Diastatotropis rubra Frieser 1992
Creators: name: Trýzna, Miloš
name: Baňař, Petr
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Anthribidae
Diastatotropis
Diastatotropis rubra

description: Diastatotropis rubra Frieser, 1992
(Figs 32–42)
Diastatotropis ruber Frieser, 1992: 48, fig. 3 on page 50 (antenna).
Rheinheimer 2004: 35 (catalogue).
Type locality. NE Madagascar, Ambodivoangy.
Note: Ambodivoangy (also as Ambodivohangy), E Madagascar, E of Maroantsetra, 5 to 50 m, station destroyed (according to Viette, 1991: 28) [Maroantsetra district].
Type material. Holotype (female): NE MADAGASCAR, TOAMASINA PROVINCE: ‘ Coll. Mus. Tervuren / N. E. Madagascar: / Ambodivoangy XII. 1961 / J. Vadon’ [p, white label] // ‘ Holo / type’ [p, a typical red label used by Frieser] // ‘ Diastatotropis / ruber sp. nov. / Holotypus ♀ [h] / det. R. Frieser [p] 19 [p] 89 [h]’ [a typical pink label used by Frieser] // ‘ Holotypus’ [black framed light orange label, additionally added by curator in MRAC] (MRAC).
Identification. Only female holotype known. Small-sized (7.18 mm), elongate species (Fig. 32). Elytra slightly convex, without sub-basal tubercles. Rostrum with only one central longitudinal carina, lateral carinae absent; central carina distinct, reaching beyond the posterior margins of eyes (Fig. 35). Antennae short, antennomeres II–VII slender, VIII wide and smoothly continue to IX, so antennal club four-segmented (Fig. 34). Disc of pronotum convex (Figs 33, 36). Surface of entire body brick reddish, underside reddish to brownish. Scape reddish, antennomeres II–VII dark brown, VIII–XI deep black.
Description. Female holotype. Measurements (in mm): Total body length—7.18. Head: total length—1.43; length of rostrum—0.77; maximum width of rostrum—1.20; length of eye—0.83; maximum width across eyes— 1.57; minimum distance between eyes—0.59.Antenna: length of segments: II—0.21, III—0.20, IV—0.23, V—0.17, VI—0.11, VII—0.11, VIII—0.11, IX—0.29, X—0.17, XI—0.26, width of segment IX—0.26. Pronotum: maximum length—1.81; width at carina (= maximal width in this case)—2.71; minimum width—1.64. Elytra: maximum length—4.08; maximum width—2.80. Pygidium: maximum length—0.84; maximum width—1.51.
Coloration of the cuticle of entire body largely brick reddish, mesosternum, metasternum and abdominal ventrites brownish. Scape reddish, antennomeres II–VII dark brown, VIII–XI deep black. Distal part of mandibles black. Legs including tarsomeres light brown, distal part of tibiae dark brown.
Vestiture. Head with brick reddish appressed setae, sparse density is also uniform along central longitudinal carina on rostrum and around eyes (Fig. 35). Labrum dark brown with shorter light-coloured setae over all its margin. Scape, pedicel and antennomeres III–IV almost bare, V–VII with sparse subdecumbent dark brown setae on their distal part, VIII–XI with appresed black setae (Fig. 34). Pronotum, including pronotal declivity, with very sparse appressed brick red setae (Fig. 33). Elytra and scutellum with very fine and sparse appressed brick reddish setae. Elytral punctures very small and inconspicuous, their diameter is much smaller than distance of individual punctures, but these punctures are bordered by dark colour in the lower layer of the cuticle, making them appear larger in dorsal view than their actual size (Fig. 32). All legs covered with dense appressed brownish setae, tibiae with subdecumbent setae in inner part, tarsomeres with light-brownish setae (Fig. 32). Whole ventral part of body and pygidium covered with indistinct sparse appressed brick reddish setae, very sparse to almost sporadic on prosternum.
Structure. Head (Fig. 35) rather shorter, rostrum wider than longer, ratio of rostrum length to maximum width 0.64 in female. Rostrum slightly bent upwards, not flat in lateral view. Lateral sides of rostrum weakly extended apically. Dorsal part of rostrum with only one central longitudinal carina, two lateral carinae absent. Central carina distinctly developed, not extended to distal part of rostrum and reaching vertex behind posterior margin of eyes. Eyes elliptical, not emarginate, dorsal ocular index 1.20. Ratio of maximum width across eyes to maximum width of rostrum 1.31.
Antennae (Fig. 34) short, not even reaching to dorsal transverse carina of pronotum. Scape not swollen, of the same width as pedicel, antennomeres III–VII flattened, but all of the same width, VIII twice as wide as previous, and thus part of the antennal club. Antennomere IX slightly longitudinal, ratio of its maximum length to maximum width 1.16 in female.
Pronotum (Fig. 33) transverse, ratio of its length to maximum width 0.67, widest in dorsal transverse carina, then abruptly narrowed to distal part, disc of pronotum regularly convex. Dorsal transverse carina slightly sinuated, not interrupted in middle. Lateral carinae of pronotum short, not reaching half of length of pronotum, widely rounded at contact with dorsal transverse carina.
Elytra (Figs 32, 36) shortly longitudinal, without sub-basal tubercles, ratio of the maximum length to maximum width of elytra 1.46. Elytral intervals completely flat, elytral punctures very small and inconspicuous, their diameter much smaller than distance between individual punctures.
Pygidium (Fig. 37) transverse, ratio of the maximum length to maximum width 0.56.
Female terminalia (Figs 38–42). Sternite VIII (Fig. 38) with bisinuate anterior margin and strongly sclerotized long apodeme. Tergite VIII (Fig. 39) slightly transverse, sub-rectangular, antero-laterally rounded, its anterior margin straight. Ovipositor (Fig. 40) wide and short, its lateral rods converging. Hemisternites unarmed, simple, without toothed plates, with only rather smaller sub-apically placed stylus each (Fig. 41). Bursa copulatrix damaged, spermatheca as in Fig. 42.
Sexual dimorphism. Male unknown.
Collecting circumstances. Unknown.
Distribution. NE Madagascar, Toamasina province, Ambodivoangy (only holotype known).
description: Published as part of Trýzna, Miloš & Baňař, Petr, 2022, Diastatotropis arofaniana sp. nov. from eastern Madagascar, a new species close to D. rubra Frieser, with a redescription of the type of the latter, and notes on morphology (Coleoptera: Anthribidae), pp. 30-52 in Zootaxa 5120 (1) on pages 41-44, DOI: 10.11646/zootaxa.5120.1.2, http://zenodo.org/record/6388821