Microdolichostyrax hefferni, Gabris, Radim, Kundrata, Robin & Trnka, Filip, 2016

Gabris, Radim, Kundrata, Robin & Trnka, Filip, 2016, Review of Dolichostyrax Aurivillius (Cerambycidae, Lamiinae) in Borneo, with descriptions of three new genera and the first case of (ovo) viviparity in the long-horned beetles, ZooKeys 587, pp. 49-75 : 55

Taxon classification Animalia Coleoptera Cerambycidae

Microdolichostyrax hefferni sp. n. Figs 27-33

Type material.

Holotype, female, "Malaysia, Sabah / Sipitang area / II-1-2003 / local coll // Dolichostyrax / longipes / Aurivillius / det J. Sudre 06 // HOLOTYPE / Microdolichostyrax / hefferni Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n." (HNHM, ex PCDH). Three paratypes. Female, "Malaysia, Sabah / Sipitang area / II-1-2003 / local coll // Dolichostyrax / longipes / Aurivillius / det. J. Sudre 06 // PARATYPE / Microdolichostyrax / hefferni Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n." (PCDH); female, "Malaysia, Sabah / Mt. Trus-Madi / III-17-2003/ local coll ‘Addle‘ // Dolichostyrax / longipes / Aurivillius / det J. Sudre // PARATYPE / Microdolichostyrax / hefferni Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n." (PCDH); female, "Malaysia, Sabah / Sipitang area / III-3-2003 / local coll ‘Unil‘ // Dolichostyrax / longipes / Aurivillius / det J. Sudre 06 // PARATYPE / Microdolichostyrax / hefferni Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n." (PCDH).

Diagnosis.

This species is very similar to Microdolichostyrax minutus sp. n., but differs by slightly larger body (BL 9.8-10.5 mm vs. 9.0, respectively); body pubescence darker, chestnut brown (vs. yellowish brown; Figs 27, 34), antennomere II relatively longer, 0.7 times as long as antennomere III (vs. 0.5 times), spermatheca with apex rounded (vs. tapered), and the sclerotized part of spermathecal duct very long, strongly coiled (vs. short; Figs 33, 39).

Description of holotype

(female). BL 9.8 mm, BW 3.3 mm. Body brown; antennae, legs and palpi lighter. Body densely clothed with very short chestnut brown pubescence, incorporating fine detritus particles (Fig. 27).

Head slightly wider than anterior pronotal margin. Antennae 0.7 times as long as body; scape enlarged, reaching about half of pronotum, gradually widened towards apex, thickest at apical part, surface slightly distorted, not smooth, covered with very short dense pubescence; the relative ratio of antennomere lengths: 3.4: 0.7: 1.0: 1.2: 1.1: 0.9: 0.8: 0.8: 0.8: 0.8: 1.4 (Fig. 31).

Prothorax as long as wide, laterally with one small obtuse tubercle; pronotal disc with pair of tubercles near middle and one median at second half; pronotal tubercles punctured. Prosternum in front of coxae 0.8 times shorter than diameter of coxal cavity. Scutellum transverse, about 3.5 times as wide as long. Elytra elongate, 1.8 times as long as wide at widest part, 2.3 times as long as pronotum, widest near middle; each elytron with three rows of irregular, slightly elevated tubercles (Figs 27-28), sparsely covered by large deep punctures irregularly in rows, surface not wrinkled. Legs long, slender; relative lengths of metatarsomeres 1.0: 0.6: 1:0: 1.6.

Female genitalia with ovipositor elongate, narrow, apically with short styli (Fig. 32). Vagina narrow, with pair of vaginal plates. Bursa copulatrix small. Spermatheca well-sclerotized, simple, slender, elongate, slightly curved, apex rounded; sclerotized part of spermathecal duct very long, strongly coiled (Fig. 33).

Variability.

BL 9.8-10.5 mm, BW 3.3-3.7 mm. Paratypes are slightly larger and more oval than holotype.

Distribution.

Malaysia: Borneo (Sabah: Sipitang, Trus Madi).

Etymology.

The specific name is a patronym in honor of Mr. Daniel J. Heffern (Houston, USA), who kindly provided us with the type material.