Drylichus hylesinoides Heller 1916
Creators: name: Kodada, Ján
name: Jäch, Manfred A.
name: Jr, Čiampor Fedor
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dryopidae
Drylichus
Drylichus hylesinoides

description: Drylichus hylesinoides Heller, 1916
(Figs 1, 2–6, 8–9, 11–21, 30–38)
Drylichus hylesinoides Heller, 1916: 284.
Type locality: "Mt. Canala, 700 m ", New Caledonia.
Material examined: Holotype 3 (SMTD): "Drs. F.Sarasin & J. Roux Neukaledonien Mt.Kanala [p]; [back side] cr. 700 m. 3. 11. 1911 [hw] / 1914 [p] 6 [hw] hylesinoides Heller [hw] Typus [p] / Drylichus I - 2 v hylesinoides Heller [hw] / Staatl. Museum fur Tierkunde Dresden". 1 Ƥ (QMM): " NEW CALEDONIA Mt Do summit 20 May 1984 G. Monteith & D. Cook / Q. M. BERLESATE No. 654 21. 45 S X 166. 0 0 E, Rainforest, 1000 m Litter".
Diagnosis: Drylichus hylesinoides is characterized by the large size, indistinct elytral striae, and by the shape and size of the aedeagus and the ovipositor.
Redescription: Habitus (Fig. 1). Length (TL): 3 4.26 mm, Ƥ 4.37 mm; width (EW): 3 1.90 mm, Ƥ 1.97 mm. Head, pronotum and venter black; elytra dark brown; legs, mouthparts and antennal club reddish-brown. Diameter of macropunctures on head subequal to diameter of facet, macropunctures nearly confluent, interstices micropunctate; frons with narrow longitudinal mesal portion unpunctate. Head width: 3 1.09 mm, Ƥ 1.15 mm. Antenna 11-segmented. Mandible with three apical teeth. Pronotal macropunctures approximately 0.7 times as large as diameter of a facet, more dense laterally, interstices densely micropunctate, 1–3 times as wide as diameter of a facet, micropunctures not confluent; pronotum more or less parallel-sided in posterior half, arcuately convergent in anterior half; disc moderately convex; pronotal rim widest in posterior half; pronotal width (MW): 3 1.94 mm, Ƥ 1.90 mm; pronotal length (PL): 3 1.31 mm, Ƥ 1.34 mm. Prosternum densely and irregularly punctate on anterior half, nearly rugose laterally, with flat granules mainly posterolaterally, granules feebly smaller than facets, irregularly arranged; prosternal process with distinct longitudinal mesal keel. Hypomeron posteriorly wider than profemur, irregularly punctate and granulate. Mes- and metepisterna irregularly punctate, punctures intermixed with few scattered small granules; metaventrite as long as prosternal process, disc deeply impressed, finely punctate, sides raised; discrimen moderately raised posteriorly. Scutellum wider than long, subtriangular, lateral margins rounded. Elytra moderately convex, subovate, widest near middle, posterior third strongly declivous; sides moderately arcuate anteriorly, strongly arcuate posteriorly, lateral edge visible in dorsal view along anterior fourth and subapically; anterior margin finely irregularly crenulate; anterolateral angle nearly rectangular, protruding; each elytron with transverse depression near anterior margin; ratio of EL/EW: 1.54 (3), 1.57 (Ƥ); elytral disc rather irregularly and shallowly punctate, rugose, with dual punctation; macropunctures smaller than facets, irregularly arranged; striae very fine, indistinct. Midline lengths of ventrites 1–5: 0.71/0.35/0.19/0.20/ 0.72 mm (3), 0.65/0.39/0.33/0.27/ 0.80 mm (Ƥ); male ventrites irregularly punctate, rugose, except of abdominal intercoxal process, which is sparsely punctate, apex of ventrite 5 rounded; in female ventrites less rugose. Male sternite 8 with short anterior process (Fig. 36); female sternite 8 as long as ovipositor, mesal process narrow (Fig. 38). Aedeagus 1.69 mm long; phallobase 2.18 times as long as parameres, subcylindrical, asymmetric basally (Fig. 30). Parameres widest basally, moderately inflected ventrad in apical half (Fig. 32); ventroapical half with longitudinal stripes (Fig. 34); apices rounded and flattened in lateral view. Penis feebly shorter than parameres, widest basally, gradually tapering to apex (Fig. 31); apex narrow, subacute; anterolateral apophyses short and wide. Membranous ventral sac robust; surface with mosaic structure (Fig. 33), meshes larger and more oblique basally; fibula distinct and strong. Ovipositor 2.13 mm long (ca. as long as abdomen), strongly sclerotized, posteroventral portion smooth; valvifer about 1.46 times as long as coxite (Fig. 37); bursa copulatrix without sclerotized spinules.
Sexual dimorphism: Tibiae of male wider than in female, especially protibia strongly thickened in distal half (as wide as combined length of tarsomeres 1–3). Abdomen of male more rugose than in female.
Distribution: So far known from two localities in New Caledonia (Fig. 48).
Habitat: Rainforest litter at higher elevations (700–1000 m a.s.l.).
description: Published as part of Kodada, Ján, Jäch, Manfred A. & Jr, Čiampor Fedor, 2009, Review of the genus Drylichus Heller (Insecta: Coleoptera: Dryopidae), pp. 43-58 in Zootaxa 2157 on page 52, DOI: 10.5281/zenodo.188880