Psammoecus parallelus Grouvelle 1919
Creators: name: Karner, Michael
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Silvanidae
Psammoecus
Psammoecus parallelus

description: Psammoecus parallelus Grouvelle, 1919
(Fig. 4)
Material examined
Holotype
♀: ‘ Salisbury | Mashonaland | Aug. 1900 | GaKM’ [on backside of mounting label], ‘Type’ [round label with orange border], ‘Salisbury, | Mashonaland. | Marshall. | 1902 -245’, ‘ Psammoecus | parallelus | typ | Grouv’ [Grouvelle’s hand] (BMNH).
Other material
1 spm ‘COLL. MUS. CONGO | Kasenyi | 19-VIII-1937 | H.J. Brédo’ (MRAC). 1♀ ‘Dans marais | roselier’, ‘I.R.S.A.C. – MUS. CONGO | Kibali-Ituri: Blukwa (Tsa) | 1820 m. I-1954 | N.Leleup’ (MRAC). 1♀ ‘I.R.S.A.C. - MUS. CONGO | Bendera, terr. Albertville | 1000 m. (à la lumière) | N. Leleup X-1958 ’ (MRAC). 1♂ ‘I.R.S.A.C. - MUS. CONGO | Bendera, terr. Albertville | riv. Kiymbi 1000 m. | B. 18 N, Leleup VII-1958 ’, ‘Biot. No 18 | dans détritus | et humus’ (MRAC). 1♂ ‘COLL. MUS. CONGO | Urundi: Bugesera, rives | lac Tshohoha YX- 1957 | N. Leleup’ (MKF). 1 spm ‘MUSÉE DU CONGO | Haut-Uelè: Watsa | - 1922 | L. Burgeon’ (MRAC). 1♀ ‘Récolté dans | panicule de | riz’, ‘COLL. MUS. CONGO | 15 kn E. Yangambi | 21 1952 | J.Decelle’ (MRAC). 2 spms ‘COLL. MUS. CONGO | Kivu: Sanghe, Pl. Ruzizi | (à la lumière) XII-1951 | H. Bomans’ (MRAC). 1♀ ‘I.R.S.A.C. – MUS. CONGO | Kivu: Lemera, terr. Uvira | 1600 m. XII-1956 | N. Leleup’ (MRAC). 2♀♀ ‘Biot. No 25 | racines de | plantes basses’, ‘I.R.S.A.C. - MUS. CONGO | Mont Kabobo, terr. Albert- | ville, Hte Kiymbi 1700 m. | B.25 N. Leleup IX-1958 ’ (MRAC). 1 spm ‘COLL. MUS. CONGO | Nioka | VII-1937 | J. Ghesquière’ (MRAC). 1 spm ‘COLL. MUS. CONGO | Sankuru: Gandajika | V-1955 | J. Decelle’ (MRAC). 1 spm ‘COLL. MUS. CONGO | Tanganika: Musosa, 980 m. | (à la lumière) XI-1953 | H. Bomans’ (MRAC). 1♀ ‘COLL. MUS. CONGO | Elisabethville (A la | lumière) x-1959 | Ch. Seydel’ (MKF). 1♂ ‘I.R.S.A.C. - MUS. CONGO | Bas-Congo: Rives de | La N’Tadi 9-IX-1949 | N. Leleup’ (MRAC). 1 spm ‘MUSÉE DU CONGO | Kisantu | - 1932 | R.P. Vanderyst’ (MRAC). 1♀ ‘COLL. MUS. CONGO | Bas Congo: Thysville | 1-2/XII-1952 | P. Basilewsky’ (MRAC). 1 spm ‘COLL. MUS. CONGO | Côte d’Ivoire: Adiopo- | doumé 1957 | P. Dessart’ (MRAC).
Differential diagnosis
Differs from Ps. personatus and Ps. leleupi sp. nov. by the shorter lateral teeth of pronotum; from Ps. leleupi sp. nov. also by narrower elytral striae, round dark maculae in posterior third of elytra, darkened suture near elytral apex, and the absence of a darkened area at bases of elytra; from Ps. hacquardi and Ps. laetulus by round dark maculae in posterior third of elytra, darkened suture near elytral apex, the absence of a darkened area at bases of elytra and very wide bases and club-shaped extensions of parameres; from Ps. marginicollis by 1 st antennomere being almost three times as long as 2 nd and from Ps. marginicollis and Ps. luchti sp. nov. by very wide bases and club-shaped extensions of parameres.
Redescription
BODY. Slender, total length 2.85-3.30 mm (Fig. 4A), surface yellowish-brown, elytra with round dark maculae at beginning of posterior third near lateral margins, suture darkened along posterior third. Antennae yellowish brown, 7 th- 10 th and apex of 6 th antennomere brown, 11 th antennomere lighter reddishbrown, but somewhat darker than basis of antennae.
HEAD. Wide, temples curved; width 0.48-0.78 mm, length 0.40-0.45 mm, 1.41-1.82 times as wide as long. Eyes protuberant, 0.21-0.23 mm long, distance of inner margins 0.48-0.53 mm. Puncturation on vertex coarse, dense, density of punctures variable. Pubescence composed of long, semierect setae, directed anteriorly; microsculpture visible only in few specimens, very shallow, reticulate. Longitudinal impressions on vertex distinct, extending slightly behind middle of eyes. Antennae as in Fig. 4B, slender, 1.35-1.63 mm long; antennomere proportions of holotype as follows: 2.9: 1.2: 1.4: 1.5: 1.5: 1.3: 1.2: 1.1: 1.0: 1.0: 2.2.
PRONOTUM. Subquadrate, 0.73-0.81 mm wide, 0.60-0.68 mm long, 1.19-1.26 times as wide as long. Anterior angles with distinct group of small teeth; lateral margins with five teeth, tooth I small, teeth II and III larger, of similar size, teeth IV and V as big as tooth I; posterior angles with small tooth. Puncturation and pubescence on disc as on vertex, microsculpture absent.
ELYTRA. Oval, length 1.80-2.10 mm, combined width 1.03-1.25 mm, 1.67-1.76 times as long as their combined width. Rows of punctures on disc slightly wider than interstices; pubescense composed of long, semierect setae, directed posteriorly; microsculpture absent.
PARAMERES. With very large base and club-shaped apical extension. Inner margins of base and apical extension with numerous setae of variable size, apex with one large seta (Fig. 4C).
description: Published as part of Karner, Michael, 2012, A revision of African Psammoecus (Coleoptera, Silvanidae) and descriptions of two new species from the collection of the Musée royal de l'Afrique centrale, pp. 1-31 in European Journal of Taxonomy 17 (17) on pages 9-11, DOI: 10.5852/ejt.2012.17, http://zenodo.org/record/3857844