Agyrtodes nemoralis (Broun)

Seago, Ainsley E., 2009, Revision Of Agyrtodes Portevin (Coleoptera: Leiodidae), The Coleopterists Bulletin (mo 7) 63, pp. 1-73 : 57-59

publication ID	https://doi.org/ 10.1649/0010-065x-63.sp7.1
publication LSID	lsid:zoobank.org:pub:B58B2216-0CFA-41C6-8141-7024E65ECF85
persistent identifier	https://treatment.plazi.org/id/039887BA-FFDF-C077-92D1-8136EC8C961A
treatment provided by	Carolina
scientific name	Agyrtodes nemoralis (Broun)
status

Treatment

Agyrtodes nemoralis (Broun) View in CoL

(Figs. 19, 56, 76, 96, 103)

Choleva nemoralis Broun 1909: 230 View in CoL . 2 syntypes, ‘‘Broken River’’ (BNHM, could not be located by the author)

Agyrtodes monticola View in CoL auct. (not Broun 1893). Jeannel (1936: 107) [subjective synonym of A. nemoralis (Broun) View in CoL ].

Agyrtodes nemoralis (Broun) View in CoL . Newton (1998: 166) [synonymy with A. monticola View in CoL rebutted, implicit transfer to Agyrtodes View in CoL ].

Distribution. New Zealand: north and central South Island ( Fig. 103 View Fig ). Material examined listed in Appendix 1.

Diagnosis. A. nemoralis is very slightly smaller and paler brown than the sympatric A. labralis , with male genitalia very similar in shape to those of A. labralis , but without raised teeth on internal faces of parameres. Body widest across elytral disc, abundantly pubescent, epistomal suture present, without stem; antennae with segment 8 subquadrate, scarcely longer than wide.

Redescription. TBL 5 2.6 mm, EW 5 1.45 mm, PNW 5 1.3 mm, HW 5 0.6 mm. (TBL variation: 2.4–2.7 mm)

Body (including head) medium reddish- brown, pronotum and elytral disc darker brown (Fig. 19). Head broad, integument shining reddish-brown, dorsally clothed with long golden semirecumbent hairs set into small, deep punctures. Eyes small, produced anteriad. Epistomal suture present, without stem. Clypeus large, ovate, weakly transverse; labrum small, narrow, emarginate at apex. Mandibles of normal shape, dens blunt, with small cluster of minute hairlike sensillae immediately below apex. Maxillae with galea slender, weakly sclerotized, with small, hyaline apical brush of short setae, lacinia broad, well-sclerotized at base, expanded apically and bearing large, broad spore-brush of minute, densely packed teeth; maxillary palpi with terminal segment elongate, attenuate, gently truncate at apex; penultimate segment slightly wider and less than half as long as terminal segment. Labium with two large, tapering digitiform sensillae inserted medially on distal margin of ligula; labial palpi three-segmented, terminal segments elongate, cylindrical, with evenly distributed armature of blunt, minute digitiform sensillae on all sides, intermediate and basal segments of labial palpi reduced, short and transverse. Antennae ( Fig. 56 View Figs ) with robust club, segments 1–2 yellow, 3–6 and 8 light brown, segments 7 and 9–11 medium to dark reddishbrown. First segment cylindrical, curved; second segment wider than first, weakly inflated medially. Segments 3–4 of approximately equal size and shape, segments 5–6 short, stout; segment 6 subovate, barely twice as long as wide. Segment 7 broad, cylindrical at base, weakly expanded distally; segment 8 subquadrate, very slightly longer than wide, parallel-sided. Segment 9 broader than 8, longer than all subsequent segments; segment 10 longer than wide, expanded distally. Segment 11 elongate, narrow, bluntly pointed and weakly sclerotized at apex.

Pronotum convex, transverse, integument dark brown and shining with abundant fine, long, golden recumbent vestiture set into shallow punctures. Posterior margin transparent; hind angles blunt, weakly inflexed laterally, gently produced posteriad.

Elytra strongly convex, reddish-brown laterally, darker brown at disc. Elytral vestiture of abundant long, golden, semirecumbent setae set into small, deep, conspicuous punctures in transverse strigae. No traces of longitudinal strial impressions. Elytral apices strongly deflexed, pointed but not attenuate. Scutellum small, reddish-brown.

Hypomeron light orange-brown, strongly concave posterior to procoxal cavities. Meso- and metasterna dark reddish-brown. Mesosternum with pronounced median carina, smoothly curving and convex in lateral view, effaced anteriorly. Mesepimera broad, tapering medially, squarely truncate at coxal articulations. Metasternum convex and setose medially, flattened laterally, with strigulose microsculpture of stretched sculpticells. Metepisternum lanceolate, broad and square anteriorly and tapering posteriad to an acute point.

Abdomen normal, male sternum VII deeply, broadly cleft, sternum VIII almost completely divided, connate only at basal margin.

Legs light reddish-brown, of normal proportions. Male protarsi with first two segments weakly expanded, much narrower than tibial apex; segments 1–3 narrowly cordate and bearing tenent setae. Male mesotarsi simple, neither expanded nor bearing tenent setae. Claws small, simple; female tarsi simple.

Male genital segment ( Fig. 76 View Figs ) elongate, narrow, basally constricted, with pleurites abundantly setose and sharply pointed at apices; small sclerotized remnant of sternum X internally fused to ventral margins of pleurites. Anterior apophysis minute, short, very slender, with slight expansion at apex. Aedeagus ( Fig. 96 View Figs ) with median lobe long, cylindrical, with basal piece as long as penis. Apex of median lobe very similar to A. labralis , produced into small papillate knob; subapical region of median lobe with very weakly, obtusely produced lateral corners. Parameres extending well beyond apex of median lobe, internal faces of parameres with two rows of long, stiff, inward-facing setae, without triangular median teeth; parameres slender basally, gently constricted medially, flared abruptly and tapering weakly to form flattened, oar-shaped apices. Endophallus with abundant hyaline setae, long, dense patch of medium-sized, well-sclerotized, acutely pointed teeth, and paired, slightly larger fang-shaped sclerites basally. Female terminalia with coxite slender, attenuate, stylus minute, cylindrical, one-third as long as coxite and bearing terminal seta more than twice its length.

Natural History. Collected by berlese processing of leaf litter near logs and via window traps in Nothofagus forests; also collected on pore surface of Ganoderma conk. Agyrtodes nemoralis is at least partially sympatric with A. labralis (on the northern end South Island of New Zealand, often from identical localities) but is much less frequently collected.

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Coleoptera
Family	Leiodidae
Genus	Agyrtodes