cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Megaselia hojerensis Henry & Bøggild 2021, n. sp.
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia hojerensis

description: Megaselia hojerensis n. sp.,
(Figs 97–107).
Diagnosis. In the keys of Lundbeck (1922) it runs to Group VI couplet 32 lead 2 M. impolluta (Schmitz), a synonym of M. sylvatica (Wood), but its hypopygium is clearly different. In the key to the males of the British species (Disney, 1989) it runs to couplet 232, but its hypopgium fits neither option. In Borgmeier’s (1966) key to Nearctic Group VII it runs to couplet 21 lead 2 M. postcrinata Borgmeier, but its costal index is only about 0.44.
Description. Male. Frons as Fig. 97, with dense but very fine microtrichia. Cheek with 3 bristles and jowl with 2 that are longer and more robust. Postpedicels, without SPS vesicles, palps and proboscis as Fig. 98, the labella lacking short spinules below. Thorax with 3 notopleural bristles and no cleft in front of these, and mesopleuron bare (Fig. 99). Scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdomen as Fig. 100, the gray venter with small hairs on segments 3–6. Hypopygium as Figs 101–103, the hypandrium with a pale left lobe but no right lobe, and the epandrium has a bristle each side that is longer than the subequal hairs on the rest and those of the cerci, proctiger and at the rear of tergite 6. Legs yellow. Fore tarsus with posterodorsal hair palisade on segments 1–5 (Figs 104 and 105). Dorsal hair palisade of mid tibia extends about 0.8 times its length. Hairs below basal half of hind femur longer than those of anteroventral row of outer half (Fig. 106). Hind tibia with about a dozen differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 107) 1.85 mm long. Costal index 0.47. Costal ratios 3.5: 1.8: 1. Costal cilia (of section 3) 0.12 mm long. Vein 3 hair 0.02 mm long. 4 axillary bristles, the outermost being 0.12 mm long. Sc not reaching R1. Haltere knob pale.
Type material. Holotype male, DENMARK, DK, SJ, Højer Sluse, 4–17.V.2017, Esben Bøggild (UCMZ —9– 27).
Etymology. Named after the type locality
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on pages 319-321, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Megaselia jenshjerrildi Henry & Bøggild 2021, n. sp.
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia jenshjerrildi

description: Megaselia jenshjerrildi n. sp.,
(Figs 108–120)
Diagnosis. In the keys of Lundbeck (1922) it runs to Group IV couplets 36, or 45 lead 2 or 46 lead 2, but the hypopygia are all different. In the key to the males of the British species (Disney, 1989) it runs to couplet 62, where likewise the hypopygia are different. In the key of Schmitz & Beyer (1965) for Abteilung IV Zweite Reihe it runs to couplet 20, where hypopygia differ, especially in having a long bristle as well as hairs on each side of the epandrium. In Borgmeier’s (1964) key to Nearctic Group IV it runs to couplet 17 lead 1 M. difficilis (Malloch) but it’s hypopygium and hind femur are different.
Description. Male. Frons as Fig. 108, with microtrichia restricted to margins. Cheek with 5 bristles and jowl with 2 that are much longer and more robust. Postpedicels, without SPS vesicles (Fig. 110), palps and proboscis as Fig. 109, the labella with numerous short spinules below (Fig. 111). Thorax brown with 3 notopleural bristles and no cleft in front of these, and mesopleuron with hairs (Fig. 112). Scutellum (Fig. 113) with an anterior pair of small hairs and a posterior pair of bristles. Abdomen as Fig. 114, the venter with a few small hairs on segments 3–5 but several long hairs on 6. Hypopygium as Figs 115 & 116. Legs brown to yellowish brown. Fore tarsus (Fig. 117) with posterodorsal hair palisades on segments 1–4 and 5 dilated and broader than 4. Dorsal hair palisade of mid tibia extends about 0.64 times its length. Hind femur (Fig. 118) with blunt spines in basal third (Fig. 119)marginally shorter than hairs of anteroventral row of outer half. Hind tibia with about 20 moderately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 120) 2.3 mm long. Costal index 0.49. Costal ratios 3.5: 2.1: 1. Costal cilia (of section 3) 0.15 mm long. Vein 3 hair 0.05 mm long. 6 axillary bristles, the outermost being 0.18 mm long. Sc not reaching R1. Haltere knob yellow (Fig. 114).
Type material. Holotype male, DENMARK, DK, EJ, Onsild Mose, 21.V.–5.VI.2017, Esben Bøggild (UCMZ — 9–19).
Etymology. Named after Jens Hjerrild, who works for the Government’s Nature Agency and suggested valuable sites for Esben’s malaise traps.
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on page 321, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Megaselia micawberi Henry & Bøggild 2021, n. sp.
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia micawberi

description: Megaselia micawberi n. sp.
(Figs 132–145)
Diagnosis. In the key of Lundbeck (1922) it runs to couplet 47 lead 1, where its pale legs and hypopygium clearly distinguish it, or to couplet 48 lead 2 to M. nudiventris (Wood), whose hypopygium is clearly different (Figs 9 & 10 in Disney, 2011d). In the key to the males of the British Isles (Disney,1989) it runs to couplets 191 lead 1 or 192 but its hypopygium fits none of the options. It fails to run down in keys for the rest of the world’s fauna and subsequent additions.
Description. Male. Frons as Fig. 132, with dense but very fine microtrichia. Cheek with 3 or 4 bristles and jowl with 2 that are longer and more robust. Postpedicels, which lack SPS vesicles (Fig. 134), palps and proboscis as Fig. 133. The labella with only a few short spinules below. Thorax brown, with 3 notopleural bristles and no cleft in front of these and mesopleuron bare (Fig. 135). Scutellum with an anterior pair of dorsal hairs and a posterior pair of bristles. Abdominal tergites brown with moderate hairs, but longer ones at rear of tergites) gray, and with hairs on segments 3–6 (Fig. 136). Hypopygium as Figs 137–140, the left side of epandrium having one bristle longer the those at rear of T6. The pale left hypandrial lobe with small microtrichia absent near tip and on inner face (Fig. 138). The right hypandrial lobe very short but broad (Fig. 139). Legs dusky yellow to yellow. Fore tarsus with posterodorsal hair palisade on segments 1–5 and 5 only just longer than 4 (Figs 141 & 142). Dorsal hair palisade of mid tibia extends about 0.75 times its length. Hairs below basal half of hind femur longer than those of anteroventral row of outer half (Fig. 143). Hind tibia about 15 modferately differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 144) 1.77–1.80 mm long. Costal index 0.45–0.50. Costal ratios 2.8–3.4: 1.7–2.0: 1. Costal cilia (of section 3) 0.11–0.12 mm long. Vein 3 hair 0.05 mm long. 4 axillary bristles (Fig. 145), the outermost being 0.0.11– 0.13 mm long. Sc reaching R1. Haltere knob pale (Fig. 145).
Type material. Holotype male, DENMARK, DK SJ, Draved Skov, 17.V.–8.VI.2014, Esben Bøggild (UCMZ — 9–26). Paratype male as holotype.
Etymology. Named after the ever-optimistic Wilkins Micawber in the Dickens novel David Copperfield. His optimistic approach to hardships is ever inspiring.
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on page 324, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Megaselia munki Henry & Bøggild 2021, n. sp.
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia munki

description: Megaselia munki n. sp.
(Figs 146–156)
Diagnosis. In the keys of Lundbeck (1922) it runs to Group IV couplet 5 lead 2 M. subnitida (Lundbeck), but its hypopygium is different (Figs 27–30 in Disney & Häggqvist, 2018). In the key to the males of the British Isles (Disney,1989) it runs to couplet 248, but neither option applies. In Borgmeier’s (1966) key to Nearctic Group VII it runs to couplet 12 M. minuta (Aldridh), a species widely recorded in the Palaearctic Region since Borgmeier’s key. However, its hypopygium is different and it has only 2 bristles on the notopleuron. It fails to key out in the rest of the world’s fauna.
Description. Male. Frons as Fig. 146, with dense but very fine microtrichia. Cheek with 2 bristles and jowl with 2 that are longer and more robust. Postpedicels, without SPS vesicles, and palps as Fig. 147. Proboscis as Figs 147 and 148, the labella with many small hairs below. Thorax as Figs 149 and 150, with 3 notopleural bristles and no cleft in front of these, mesopleuron bare and scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdominal tergites as Fig. 150, with T5 and T6 as Fig. 151. Venter gray, and with hairs on segments 3–6. Hypopygium as Figs 152 & 153, the epandrium having hairs at most as long as those on the cerci, protiger and those at rear of T6 and the hypandrium with a very short but broad lobe without microtrichia and the right lobe absent. The pale anal tube shorter than length of epandrium. Legs brown but not dark brown. Fore tarsus with posterodorsal hair palisade on segments 1–4 and 5 just longer than 4 (Fig. 154). Dorsal hair palisade of mid tibia extends about 0.67 times its length. Hairs below basal half of hind femur longer than those of anteroventral row of outer half (Fig. 155). Hind tibia with 14–16 weakly differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 156) 1.38 mm long. Costal index 0.41. Costal ratios 4: 1.5: 1. Costal cilia (of section 3) 0.09 mm long. Vein 3 hair 0.01 mm long. With 2 unequal axillary bristles (repesented by their sockets only in the holotype). Sc not reaching R1. Haltere knob pale (Fig. 150).
Type material. Holotype male, DENMARK, DK, EJ, Hevring Hede, 15.V–18.VI. 2006, Thorkild Munk (UCMZ —9–21).
Etymology. Named after the collector, Thorkild Munk.
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on pages 324-326, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Megaselia nigricia Disney & Durska
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia nigricia

description: Megaselia nigricia Disney & Durska
(Figs 169–172)
Megaselia nigricia Disney & Durska, 2011: 4 (male)
Diagnosis. This species was described from a single male from Poland. It closely resembles M. nigrescens (Wood). Indeed, the hypopygia are very alike. Unfortunately, the front legs of the holotype were damaged and only the incomplete front tarsus of one leg remained. The specimens from Denmark allow a clearer distinction. Thus, the fore tarsus of M. nigrescens has posterodorsal hair palisades on segments 1 to 4 only (Fig. 172); whereas in M. nigricia they are present on all five segments (Fig. 171). In addition, the postpedicels of M. nigrescens lack SPS vesicles (Fig. 170) but are present in M. nigricia (Fig. 169).
Material examined. Denmark, 2 males, Tofte Mose, 13–24. V. 2007, Esben Bøggild (UCMZ —9–17). Male, DK NEJ, Døstrup, Simested Å, 5–14. V.2016, Esben Bøggild (UCMZ —8–63).
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on page 328, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Megaselia svendi Henry & Bøggild 2021, sp. n.
Creators: name: Henry, R.
name: Bøggild, Esben
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Megaselia
Megaselia svendi

description: Megaselia svendi sp. n.
(Figs 213–224)
Diagnosis. In the key of Lundbeck (1922) for Group VI it runs to couplet 22, but the extensive yellow colouring rules out the species. In the keys to the males of the British species (Disney, 1989) it runs to couplet 190 lead 1 or couplet 233. The colouring and the hypopygium excludes this species. It fails to run down in keys for the rest of the world’s fauna and subsequent additions.
Description. Male. Frons as Fig. 213 and devoid of microtrichia. Cheek with 5 bristles and jowl with 2 that are clearly longer and more robust (Fig. 216). Postpedicels extremely pale and lacking SPS vesicles (Fig. 215). Palps yellow and proboscis as Fig. 214 and with numerous short spinules below (Fig. 216). Thorax (Fig. 217) yellow, with 3 notopleural bristles and no cleft in front of these, mesopleuron bare, and scutellum with an anterior pair of small hairs and a posterior pair of bristles. Abdomen as Fig. 218, with the hypopygium as Figs 219 & 220. Legs yellow apart from brown tip to the hind femur. Fore tarsus with posterodorsal hair palisade on segments 1–4 (Fig. 221). Dorsal hair palisade of mid tibia extends about 0.8 times its length (Fig. 222). Hind femur as Fig. 223. Hind tibia with 15–16 differentiated posterodorsal hairs, without anterodorsals, and spinules of apical combs simple. Wings (Fig. 224, 243) extremely pale and 1.87 mm long. Costal index 0.56. Costal ratios 3.4: 2.8: 1. Costal cilia (of section 3) 0.05 mm long. Hair at base of vein 3 only 0.01 mm long. With 3 axillary bristles, the outermost being 0.13 mm long. Sc very pale and reaching or else not quite reaching R1. Haltere almost white.
Type material. Holotype male, DENMARK, DK EJ, Onsild Mose, 5–25.VI 2017, Esben Bøggild (UCMZ — 8–186).
Etymology. Named Esben’s grandson Svend.
description: Published as part of Henry, R. & Bøggild, Esben, 2021, Nineteen new species of Megaselia Rondani (Diptera, Phoridae) from Denmark, pp. 306-342 in Zootaxa 4975 (2) on page 334, DOI: 10.11646/zootaxa.4975.2.4, http://zenodo.org/record/4925219
Micridium angulicolle Fairmaire 1858
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium angulicolle

description: Micridium angulicolle (Fairmaire, 1858) as Ptilium angulicolle
(Figs. 1, 29)
Habitus Fig. 1. Length 0.52 mm. Colour: dark yellowish brown, antennae and legs yellow, elytra transluscent. Antonnomeres 3–11 length 0.19 mm. Width across eyes 0.16 mm. Pronotum length. 0.13 mm, width 0.18 mm, widest in anterior half, strongly punctured and pubescent, and without distinct linear depressions, lateral margins sinuate behind middle, Fig. 29. Elytra length, 0.33 mm, width 0.22 mm, sides evenly rounded, widest at middle, less strongly punctured and pubescent than the pronotum, shining. Wings visible through the elytra.
Remarks. The description, figure and measurements are based on the syntype in BMNH. This is mounted on a small piece of clear mica(?) attached to a card with the rear corners cut off. Labels are present as follows: ' angulicolle Brisout 1866 ' (in Matthews' hand, back corners also cut off); ' angulicolle Type from M. Brisout de Barneville France 1866' (in Matthews' hand on blue card with the rear corners cut off); '2239' (Matthews/Mason collection number); ' Matthews coll. 1904 - 120' (BMNH accession number) and 'Syntype' (added by BMNH). (Fig. 1).
Details of the ventrum, viewed through the mount, were not sufficiently clear to enable positive determination to Micridium and for the reasons given above no attempt was made to detach the insect or to dissect it so that the sex is not known.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 237, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium attenboroughi Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium attenboroughi

description: Micridium attenboroughi sp.n.
(Figs. 10, 28, 34, 50, 63, 72 a/b, 82a/b, 95)
Habitus Fig. 10. Length 0.56 mm. Colour: yellow/brown, pubescence, legs and antennae pale yellow. Antonnomeres 3–11 length 0.20 mm. Width across eyes 0.16 mm. Mentum: narrowed to base, sides straight, submentum with 3 setae, Fig. 34. Pronotum length 0.15 mm, width 0.21 mm, with two distinct, almost parallel, linear depressions, Fig. 28. Elytra length 0.35 mm, width 0.27 mm. Mesoventrum: keel narrow not reaching posteriorly beyond mesocoxae, Fig. 50. Mesepiventra without clear reticulation, evenly rounded to mesocoxae, Fig. 50. Metaventrum: metepiventral sutures reaching posterior margin, Fig. 63; posterior intercoxal process without prominent setae in male +/-straight between lateral points, Fig. 95. Wings of usual ptiliid type.
Male: aedeagus Figs. 82a/b.
Female: spermatheca Figs. 72 a/b.
Etymology. I have great pleasure in naming this species after Sir David Attenborough, the British naturalist and broadcaster, who has recently celebrated his 90th birthday.
Diagnosis. The clearly marked, almost parallel, pronotal depressions reaching to the midpoint of the thorax will distinguish this species from all others but M. quadridens sp. n. from which it may be separated by the shorter antennae and by the form of the male characteristics.
Type data: Holotype: ♀; Bolivia, Cochabamba; BOL / Nov 2013/02, ca. 40 km E of Chimore. GPS 22, S. 17° 05' 14" E. 64° 46' 17", 213m, 22.xi.2013, sifting litter, Winkler app. extr., P. Baňař lgt. (UASC). Paratypes: ♂, same data as holotype (MMBC); 2♀ 1♂, Bolivia, Cochabamba, BOL / Nov 2013/04 ca 8 km E of Villa Tunari, GPS 24, S. 16° 59' 11" E. 65° 20' 44", 225m, 23.xi.2013, P. Baňař lgt. (MMBC, BMNH).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 237, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium boliviense Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium boliviense

description: Micridium boliviense sp.n.
(Figs. 11, 19, 35, 49, 73)
Habitus Fig. 11. Length 0.63 mm. Colour: dusky yellow, head a little darker, pubescence, legs and antennae pale yellow. Antennomeres 3–11 length 0.20 mm, 4–8 ovoid. Head with group of shallow depressions on disc. Width across eyes 0.18 mm. Mentum narrowed to base, sides straight, submentum with 3 setae, Fig.35. Pronotum with two distinct linear depressions in basal half converging anteriorly, sides evenly rounded, length 0.16 mm, width 0.23 mm, Fig. 19. Elytra widest at middle, length 0.36 mm, width 0.27 mm. Mesoventrum: keel narrow between mesocoxae, Fig. 49. Mesepiventra without clear reticulation, evenly rounded to mesocoxae, Fig. 49. Metaventrum: metepiventral sutures not reaching posterior margin, posterior intercoxal process shallowly concave. Wings absent.
Male: not known.
Female: spermatheca in the form of the number 8, Fig. 73.
Etymology. Named after the country where the insect was found.
Diagnosis. The form of the pronotal linear depressions, the absence of wings, and the shape of the spermatheca distinguish the species.
Type data: Holotype: ♀, Bolivia, Santa Cruz dep. W. Amboro NP Barientos, BOL / Nov 2013/13, 1583m, 29.xi, sifting litter palms, S. 18° 06' 11" E. 63° 48' 09", Winkler app. extr. P. Baňař lgt. (UASC).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 240-241, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium elegans Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium elegans

description: Micridium elegans sp.n.
(Figs. 8, 23, 36, 44, 57, 66, 74, 83a/b)
Habitus Fig. 8. Length 0.66 mm. Colour: dark, almost black, pubescence, antennomeres and legs brown. Antennomeres 4–8 widest medially and narrowed before base and apex; length of 3–11 0.29 mm, Fig. 44. Width across eyes 0.20 mm. Mentum narrowed towards base, sides straight, submentum with 3 setae, Fig 36. Pronotum length 0.14 mm, width 0.24 mm, widest in front of middle, with two distinct linear depressions in basal half narrowed anteriorly, Fig. 23. Elytra length 0.44 mm, width 0.29 mm. Mesoventrum: collar without clear humeri, keel flattened between mesocoxae, Fig. 57. Mesepiventra without clear reticulation, smoothly rounded to mesocoxae which are more widely separated than species with a narrow keel, Fig. 57. Metaventrum: metepiventral sutures close to lateral margins and reaching posterior margin, Fig. 66, posterior intercoxal process straight between lateral points. Wings of usual ptiliid type.
Male: aedeagus strongly humped with a large median and two shorter lateral projections Figs. 83 a/b.
Female: spermatheca Fig. 74.
Etymology. Named after the rather elegant appearance of the species.
Diagnosis. The very dark colour, length of antennomeres 4–7, lack of mesoventral humeri, and form of both the female and male genitalia quickly distinguish this species.
Type data: Holotype: ♀, Peru, Cusco Dept., Villa Carmen field station, 1.7 km west cafeteria research transect, Flight intercept trap, 12.89250S 71.41917W, 555m, 21–22.v.2011, D.J.Bennett & E. Razuri (MUSM). Paratypes: 6 examples, same data as holotype (MUSM, SEMC, BMNH).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 241-242, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium foveatum Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium foveatum

description: Micridium foveatum sp.n.
(Figs. 13, 21, 40, 46, 59, 64, 75, 85, 91, 102)
Habitus Fig. 13. Length 0.64 mm. Colour dark brown, pubescence, antennae and legs dusky yellow. Length of antennomeres 3–11 0.24 mm, antennomere 11 with branched sensillae, Fig. 46. Width across eyes 0.18 mm. Mentum: sides almost parallel expanded laterally at anterior corners, submentum with 3 setae, Fig. 40. Pronotum without linear depressions but with two groups of large setal depressions (numbers and positions slightly variable between specimens and some with a few scattered centrally) length 0.16 mm, width 0.22 mm, Fig. 21. Elytra length 0.42 mm, width 0.28 mm. Mesoventrum: keel narrow between mesocoxae, splitting anteriorly into two short projections which reach half way to the collar; collar with a small semicircular cap medially placed on the anterior margin and a medially placed bifid posterior projection, Fig. 59. Mesepiventra without reticulation, sinuate in posterior half with rounded hind angles. Metaventrum: metepiventral sutures short reaching +/– 1/4 length of the sclerite, Fig. 64. Pygidium with a sharp apical point Fig. 102. Wings of usual ptiliid type.
Male: posterior intercoxal process of metaventrum with a fringe of 8 flattened setae extending posteriorly beyond the metacoxal plates. Aedeagus: shape difficult to interpret, Fig. 85.
Female: spermatheca Fig. 75.
Etymology. Named after the pronotal depressions.
Diagnosis. The form of the mesoventrum quickly distinguishes this species from all others.
Type data: Holotype: ♀, Chile, Llanquihue Pr., Lago Chapo, 13.5 km E Correntoso, site 656, Valdivian rainfor., window trap, 310m, 16–27.xii.1982, A. Newton & M. Thayer (FMNH). Paratypes: 16 examples, same data as holotype (FMNH, BMNH); 3 examples, Chile, Valdivia Pr., 4.1km W Anticura, trap site 663, Valdivian rainfor., window trap, 270m, 19–25.xii.1982, A. Newton & M. Thayer (FMNH); 2 examples, Chile, Valdivia Pr., 4.1km W Anticura, trap site 663, Valdivian rain for., leaf litter on forest floor, 270m, 19–25.xii.1982, A. Newton & M. Thayer (FMNH); 1 example, Chile, Osorno Pr., Parque Nac. Puyehue, Antillanca road, trap site 661, Valdivian rainfor., 690m, 18–24.xii.1982, A. Newton & M. Thayer (FMNH); 11 examples, Chile, Osorno Pr., Parque Nac. Puyehue, 4.1 km E Anticura, trap site 662, Valdivian rainfor., forest leaf and log litter, 430m, 19–26.xii.1982, A. Newton & M. Thayer (FMNH, BMNH).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 242, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium groehni Polilov & Perkovsky 2004
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium groehni

description: Micridium groehni Polilov & Perkovsky 2004
Described on the basis of a single specimen from Baltic amber (Polilov & Perkovsky 2004). The photographs and line drawings included in the paper do not show the mesoventral carinae defining the genus Micridium as described here and the two depressions on the pronotum are rounded and not linear.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 242, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium halidaii Matthews, A. 1868
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium halidaii

description: Micridium halidaii (Matthews, A. 1868) as Ptilium halidaii
(Figs. 2, 25, 55, 69, 76, 84, 96, 101)
Habitus Fig. 2. Length 0.65 mm (as mounted with abdomen extruded 0.76 mm). Colour yellow brown, antennae and legs light yellow. Antonnomeres 3–11 length 0.19 mm. Width across eyes 0.18 mm. Mentum: narrowed towards base, sides slightly sinuate. Pronotum: punctured and pubescent, medial punctures larger than those at the sides; with two distinct, almost parallel, linear depressions reaching from the posterior margin to the centre, widest in the anterior half, lateral margins sinuate and hind angles clearly denoted, length 0.13 mm. width 0.22 mm, Fig. 25. Scutellum with four depressions at base Fig. 101. Elytra length 0.40, width 0.26 mm, punctured and pubescent, the punctures smaller than those on the pronotum; sides evenly rounded, wider just in front of centre, humeri with a row of concave depressions. Mesoventrum: keel narrow between the mesocoxae, not reaching metaventrum, Fig. 55. Mesepiventra without clear reticulation, straight before slight hind angles Fig. 55. Metaventrum: metepiventral sutures reaching +/– 3/4 of the distance from the mesoventrum to the hind coxae, Fig. 69.
Male: posterior intercoxal process of metaventrum with a fringe of flattened setae, Fig. 96. Aedeagus with a tapering point, Fig. 84.
Female: spermatheca Fig. 76.
Remarks. The habitus figure and measurements are taken from the holotype in BMNH. The description is based on the holotype and on a second, slightly smaller and darker specimen, in the Museum collected by J.A.Owen in Richmond Park, Surrey, UK on 7 January 1984 and determined by C. Johnson, this specimen was also used for the SEMs. A third specimen in a private collection mounted as a slide, also from Richmond, was borrowed to make the spermatheca drawing and figure of the male metaventral intercoxal process.
The holotype is mounted between two sheets of mica (?) attached to a card with the rear corners cut off. Labels are present as follows: 'halidayi Ih[?] July 1867 ' (pinned immediately below the specimen, apparently in Matthews' hand, rear corners also cut off); 'Type AM [monogram]' (in Matthews' hand on red card); 'haldaii' (in Matthews' hand on blue strip); ' Ptilium halidaii Mat. H. Britten 1931 '; ' Ptilium halidayi, Mat'; '2796' (Matthews/Mason collection number); ' Micridium halidaii Matth. C. Johnson det.'; 'in Matthews. Coll.'; 'Matthews coll 1904 - 120' (BMNH accession number) and 'Syntype' (added by BMNH). (Fig. 2).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 243-244, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium hilli Johnson 1969
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium hilli

description: Micridium hilli (Johnson, 1969) as Micridina hilli
(Figs. 6, 26, 58, 68, 78, 92)
The following supplements the description of Johnson (1969). Habitus Fig. 6. Length 0.48 mm. Antonnomeres 3– 11 length 0.20 mm. Width across eyes 0.17 mm. Mentum with parallel or almost parallel lateral margins, submentum with 3 or 4 setae. Pronotum length 0.13 mm, width 0.20 mm, Fig. 26. Elytra length 0.27 mm, width 0.23 mm. Mesepiventra: lateral margins without clear reticulation, Fig. 58. Metaventrum: metepiventral sutures Fig. 68, posterior intercoxal process of male Fig. 92. Spermatheca Fig. 78.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 244, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium inornatum Darby, 2017, sp. n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium inornatum

description: Micridium inornatum sp. n.
(Figs. 18, 47, 80)
Antennomeres 3–11 length 0.26 mm, 4–8 elongate, narrowed towards base. Width across eyes 0.22 mm. Mentum lateral margins almost parallel with slight medial insinuations, submentum with 3 setae. Pronotum without sculpture or depressions, sides evenly rounded, hind angles almost obscured, length 0.17 mm, width 0.28 mm, Fig. 18. Scutellum without any distinctive features. Mesoventrum: keel between mesocoxae wide and flattened, Fig. 47. Mesepiventra with distinct reticulation, Fig. 47. Mesocoxae widely separated, Fig. 47. Metaventrum: metepiventral sutures reaching midpoint only, posterior intercoxal process straight between lateral points. Wings of usual ptiliid type.
Male: not known.
Female: spermatheca Fig. 80.
Etymology. After the smooth appearance of the pronotum lacking linear depressions.
Diagnosis. The wide separation of the mesocoxae will quickly separate this species from all others except johnsoni and elegans.
Type data: Holotype: ♀, Bolivia, Cochabamba, BOL / Nov 2013/03. ca 8km E of Villa Tunari, sifting rotten wood, Winkler app. extr., GPS 23 S. 16° 59' 12" E. 65° 20' 47", 298m, 22.xi.2013. P. Baňař lgt. (UASC). Pinned on a small piece of clear acetate as a disarticulated slide using Euparal as the mountant. Paratype: ♀, same data as holotype (MMBC); the specimen was found with the elytra missing.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 244, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium johnsoni Darby, 2017, sp. n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium johnsoni

description: Micridium johnsoni sp. n.
(Figs. 7, 22, 39, 45, 53, 61, 77 a/b)
Habitus Fig. 7. Length 0.57 mm. Colour mid brown, antennae and legs yellow. Antennomeres 3–11 length 0.19 mm Fig. 45. Width across eyes 0.18 mm. Mentum: the two long setae normally located at the anterior corners situated medially, widest anteriorly but not so marked as other species of more triangular shape, submentum Fig. 39. Pronotum with larger setal depressions towards posterior margin, length 0.12 mm, width 0.22 mm, Fig. 22. Elytra length 0.37 mm, width 0.26 mm. Mesoventrum: keel wide and flattened between mesocoxae, Fig. 53. Mesepiventra: reticulation distinct, hind angles apparent at junction with metepiventral suture, Fig. 53. Mesocoxae widely separated Fig. 53. Metaventrum: reticulation distinct, metepiventral sutures terminating anteriorly at lateral angle of mesoventral suture and bending inwards to posterior margin, Fig. 61; posterior intercoxal process concave.
Male: not known.
Female: spermatheca Fig. 77 a/b.
Etymology. I have pleasure in naming this species after Colin Johnson, former curator of entomology at the Manchester Museum.
Diagnosis. The widely separated mesocoxae, posterior angles of the mesoventrum and the reticulation of the metaventrum distinguish the species.
Type data: Holotype: ♀, Peru, Madre de Dios Dept., CICRA field station 2km NW of cafeteria, research plot, flight intercept trap, 12.55236S 70.10989W, 295m, 9–11.vi.2011, Chaboo team (MUSM). Paratypes: 6 f #, same data as holotype (MUSM, SEMC, BMNH).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 246-247, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium lineatum LeConte 1863
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium lineatum

description: Micridium lineatum (LeConte 1863) as Ptenidium lineatum
(Figs. 4, 32)
Micridium lineatum Motschulsky 1869
Habitus Fig. 4. Length 0.53 mm. Colour dark yellowish brown, antennae light yellow. Antennomeres 3–11 length 0.16 mm. Width across eyes 0.17 mm. Head punctured and pubescent. Pronotum length 0.16 mm, width 0.21 mm, widest in middle, punctured and pubescent throughout, lateral margins slightly sinuate before hind angles Fig. 32. Elytra length 0.34 mm, width 0.25 mm, punctured and pubescent throughout as pronotum. Wings visible through elytra.
Remarks. The description, figure and measurements are taken from the syntype of Micridium lineatum Motschulsky in BMNH. This is mounted on a small piece of clear mica(?) and includes a few fragments of a second specimen now lost. Labels are present as follows: ' Micridium lineatum' (apparently in Matthews' hand, a third word is deleted); ' Micridium lineatum, Type from Motschulsky, N. America, 19, 1865' (in Matthews' hand on a light green card with the rear corners cut off); '1586, 1587' (Matthews/Mason collection numbers); 'Matthews coll. 1904 - 120' (BMNH accession number) and 'Syntype' (added by BMNH) (Fig. 4). A second specimen in the BMNH bearing a red label inscribed in Matthews' hand ' Micridium lineatum' and a Matthews/Mason number '3762' is not conspecific with the syntype. The holotype of Ptenidium lineatum LeConte is in the Museum of Comparative Zoology, Harvard University, USA (imaged at http://mczbase.mcz.harvard.edu/guid/ MCZ:Ent:6629).
Details of the ventrum, viewed through the mount, were not sufficiently clear to enable positive determination to Micridium and for the reasons given above no attempt was made to detach the insect or to dissect it so that the sex is not known.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 247, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium newtoni Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium newtoni

description: Micridium newtoni sp.n.
(Figs. 12, 20, 52, 60, 70, 81, 89a/b, 98, 100)
Habitus Fig. 12. Length 0.76 mm. Colour: yellow brown, head dark brown, pubescence, legs and antennae pale yellow. Antennomeres 3–11 length 0.26 mm. Width across eyes 0.22 mm. Mentum almost square, submentum with 3 setae. Pronotum: without linear depressions, lateral margins evenly rounded, widest just behind middle, length 0.17 mm, width 0.28 mm. Fig. 20. Scutellum Fig. 100. Elytra length 0.52 mm, width 0.29 mm. Mesoventrum: collar with a short pair of posteriorly directed medial arms bearing long pubescence, Fig. 60. Mesepiventra: reticulation absent, hind angles smoothly rounded, Fig. 58. Metaventrum: metepiventral sutures reaching to posterior margin, Fig. 70. Wings of usual ptiliid type.
Male: posterior intercoxal process of metaventrum with a fringe of elongate setae, Fig. 98. Aedeagus Fig. 89a/ b.
Female: spermatheca Fig. 81.
Etymology. Named after the collector Dr A.F.Newton who has been very helpful to the writer.
Diagnosis. The large size and long elytra distinguish the species.
Type data: Holotype: ♀, Chile, Cautín Pr., Volcán Villarrica, site 653, Noth. domb.-pumilio forest w/ Chusquea, window trap, 1250m, 15–29.xii.1982, A. Newton & M. Thayer (FMNH). Paratype: ♂, same data as holotype (BMNH); the specimen was found missing head and antennae and has been pinned on a small piece of acrylic as a disarticulated slide using Euparal as a mountant.
FIGURES 82–90. Micridium aedeagi. 82a/b. M. attenboroughi sp. n. 83a/b. M. elegans sp. n. 84. M. halidaii (Matthews). 85. M. foveatum sp. n. 86a/b. M. thayerae sp. n. 87a/b. M. proprium sp. n. 88a/b. M. quadridens sp. n. 89a/b M. newtoni sp. n. 90a/ b M. rhodeanum (Casey).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 247-248, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium oweni Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium oweni

description: Micridium oweni sp.n.
(Fig. 9, 27, 33, 56, 67)
Habitus Fig. 9. Length 0.54 mm. Colour: brown, legs and antennae yellow. Antennomeres 3–11 length 0.21 mm, 5– 8 elongate. Width across eyes 0.16 mm. Mentum narrowed towards base, submentum with 3 setae, Fig. 33. Pronotum widest medially and with two distinct linear depressions narrowed anteriorly and reaching +/– 3/4 the length of the sclerite, length 0.16 mm, width 0.23 mm, Fig. 27. Elytra fused, length 0.35 mm, width 0.26 mm. Mesoventrum: keel narrow between mesocoxae extending on to the metaventrum, Fig 56. Mesepiventra: reticulation absent, hind angles rounded, Fig. 56. Metaventrum: metepiventral sutures reaching to posterior margin, Fig. 67; posterior intercoxal process without setal fringe. This species is apterous.
Etymology. Named after Professor John Owen, the UK Coleopterist who died in 2016 and was very helpful to the writer.
Diagnosis. The length of the pronotal depressions and of the antennae distinguish this apterous species. Type data: Holotype: sex unknown (no genitalia were detected in the dissection], Madagascar, Ambohitantely Spec. Res., ABT. Sept.2011/10, 2.ix.2011, S. 18°10'63.9" E. 47°17'22.4", 1518m, sifting forest litter by waterfall, Winkler app. extraction, L.S.Rahanitriniaina lgt. (BMNH). Pinned on a piece of clear acetate as a disarticulated slide using Euparal as the mountant.
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 248-249, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium proprium Darby, 2017, sp. n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium proprium

description: Micridium proprium sp. n.
(Figs. 15, 37, 51, 87a/b, 94)
Habitus Fig. 15. Length 0.53 mm. Colour: yellow. Antennomeres 3–11 length 0.20 mm. Width across eyes 0.16 mm. Mentum narrowed towards base, submentum with 3 setae, Fig. 37. Pronotum without distinct linear or other depressions, length 0.14 mm, width 0.21 mm. Mesoventrum: keel narrow extending between mesocoxae onto the metaventrum, Fig. 51. Mesepiventra without clear reticulation, hind angles narrowly rounded, Fig. 51. Metaventrum: metepiventral sutures obliterated before reaching the posterior margin. Wings of usual ptiliid type.
Male: posterior intercoxal process of metaventrum with long fringe of short setae, Fig. 94. Aedeagus Fig. 87a/ b.
Female: Not known.
Etymology. From the Latin proprius meaning with personal characteristics.
Diagnosis. The fringe of setae on the posterior intercoxal process of the metaventrum distinguishes the males of this species.
Type data: Holotype: ♂, Bolivia, Santa Cruz dep., Santiago de Chiquitos, "env under El Mirador ", 693m, 5.xii 2013, S. 18°19'10" E.59°34'16", sifting dry litter, Winkler app. extr., P. Baňař lgt. (UASC). Pinned on a piece of clear acetate as a disarticulated slide using Euparol as the mountant..
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 250, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium quadridens Darby, 2017, sp.n.
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium quadridens

description: Micridium quadridens sp.n.
(Figs. 16, 17, 38, 42, 48, 65, 88a/b, 97)
Habitus Fig. 16. Length 0.56 mm. Colour: brown, pubescence, legs and antennae yellow. Antonnomeres 3–11 length 0.16 mm, 5–7 ovoid, Fig. 42. Width across eyes 0.17 mm. Mentum narrowed towards base, lateral margins straight; submentum with 3 setae, Fig. 38. Pronotum: sides evenly rounded, widest at middle, with two clearly defined elongate depressions reaching from the base to just past the middle and with +/– 5 large punctures between, length 0.14 mm, width 0.21 mm, Fig. 17. Elytra length 0.35 mm, width 0.27 mm. Mesoventrum: keel narrow between mesocoxae, extending on to the metaventrum, Fig. 48. Mesepiventra: reticulation absent, angles rounded, Fig. 48. Metaventrum: metepiventral sutures reaching to posterior margin Fig. 65. Wings of usual ptiliid type.
Male: Posterior intercoxal process of metaventrum with four flattened medial setae Fig. 97. Aedeagus Fig. 88a/ b.
Female: [no spermatheca was found in the dissection of the female]
Etymology. Named after the four prominent setae on the metaventral intercoxal process.
Diagnosis: The distinctive pronotum and form of the male metaventral intercoxal process distinguish this species.
Type data: Holotype: ♂, Bolivia, Cochabamba, BOL / Nov 2013/03. ca 8km E of Villa Tunari, sifting rotten wood, Winkler app. extr., GPS 23 S. 16° 59' 12" E. 65° 20' 47", 298m, 22.xi.2013, P. Baňař lgt.. Mounted on a piece of pinned acrylic as a disassembled slide (UASC). Paratype: ♀, as holotype (BMNH).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on page 250, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374
Micridium rhodeanum Casey 1924
Creators: name: Darby, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Ptiliidae
Micridium
Micridium rhodeanum

description: Micridium rhodeanum (Casey, 1924) as Dilinium rhodeanum
(Figs. 5, 30, 60, 71, 90a, 90b, 99)
Micridium rhodeanum (Casey); Johnson (2001)
Habitus Fig. 5. Length 0.65 mm. Colour yellow brown, legs and antennae yellow. Antennomeres 3–11 length 0.22 mm. Width across eyes 0.19 mm. Mentum narrowed towards base, lateral margins straight. Pronotum 0.25 mm wide, 0.19 mm long, with two distinct elongate depressions reaching from the posterior margin to just past the middle, the distance between them narrowing anteriorly; sides slightly sinuate before hind angles, Fig. 30. Elytra 0.40 mm long, 0.30 mm wide, widest just in front of middle. Mesoventrum: keel narrow between mesocoxae, collar with two short ridges extending posteriorly between the keel and the mesepiventral ridges which are faint, mesepiventra without obvious reticulation Fig. 60. Metaventrum: metepiventral sutures faint, angled inwards and extending half way to posterior margin Fig. 71; intercoxal process evenly rounded with comb of +/- 24 narrow setae Fig. 99. Wings of usual ptiliid type.
Male: aedeagus Figs. 90a/b.
Remarks. Five Casey syntypes (labelled as ‘paratypes’; designated as paralectotypes by Sörensson) (Fig. 5) were borrowed for study from the Smithsonian Institution, Washington DC, USA. One was remounted as a disarticulated slide in Euparal on a piece of acrylic attached to the pin and a male and female remounted on cards for examination in the SEM. No genitalia were detected in the female and further dissections were not carried out on the other very fragile specimens for the reasons given above.
I have also seen what appear to be two further examples of this species mounted on a single card, collected by R.Coleman in Fairfield Township, Sank Co., Wisconsin, USA, 30 Oct. 1953, in leaf mould and bearing the determination label ' Micridium sp. Dybas & Johnson' (MM).
description: Published as part of Darby, Michael, 2017, Taxonomic review of the genera Micridium Motschulsky, 1869 and Micridina Johnson, 1969 (Coleoptera: Ptiliidae) with eleven new species including the first records from South America and Madagascar, pp. 233-254 in Zootaxa 4242 (2) on pages 250-251, DOI: 10.11646/zootaxa.4242.2.2, http://zenodo.org/record/376374