Exochomoscirtes nahangensis, Ruta & Yoshitomi, 2010

Ruta, Rafał & Yoshitomi, Hiroyuki, 2010, Revision of the genus Exochomoscirtes Pic (Coleoptera: Scirtidae: Scirtinae) 2598, Zootaxa 2598 (1), pp. 1-80 : 72-74

publication ID	https://doi.org/ 10.11646/zootaxa.2598.1.1
publication LSID	lsid:zoobank.org:pub:B7D2F686-CE7A-42AE-8395-4527E587C565
DOI	https://doi.org/10.5281/zenodo.10538732
persistent identifier	https://treatment.plazi.org/id/FA75E2AE-9D92-45BD-B86A-B958222792BE
taxon LSID	lsid:zoobank.org:act:FA75E2AE-9D92-45BD-B86A-B958222792BE
treatment provided by	Felipe
scientific name	Exochomoscirtes nahangensis
status	sp. nov.

Treatment

Exochomoscirtes nahangensis sp. nov.

( Figs. 14E View FIGURE 14 , 59 View FIGURE 59 , 60 View FIGURE 60 )

Type material. Holotype, male ( NMW): “N VIETNAM: 26.– 30.5.1996 / 160 km NNW Hanoi, 150–200m / NE env. of Na Hang / leg. Napolov & Roma” [printed label] . Paratypes. 2 males ( NMW): same data as holotype .

Diagnosis. Exochomoscirtes nahangensis sp. nov. is distincly smaller than E. nipponicus sp. nov. The species is similar to E. meghalayensis sp. nov. and E. arunachalensis sp. nov., but the body is lighter brown, the apical process of the tegmen is half as long as tegmen, and the parameres are apically widened, and have bidentate apices.

Description. Holotype, male. Body elongate oval, TL/EW 1.4, slightly flattened, covered with erect brownish setae. Head, pronotum, scutellum, and elytra brown. Mouthparts, antennae and legs yellowish, metafemora darkened, brown; antennae subtly darkening apically. Ventral surface brown.

Head with distinct punctation, punctures separated by ca. 1.0 diameter. Eyes big, protuberant; head 2.0 X wider than interocular space. Antennae filiform. Antennomere 1 subcylindrical, antennomeres 2 and 3 of subequal lengths, antennomeres 4–11 slightly shorter than antennomeres 2 and 3 combined. Palpomeres of maxillary palpi slightly widened.

Pronotum moderately convex, covered with distinct punctation, similar to that on head, separated by ca. 1.0 diameter, anterolateral corners obtuse, slightly projecting anteriorly; lateral margins subtly rounded; posterolateral corners acute; base of pronotum bisinuate, with complete margination along basal margin; PW/PL 2.9. Scutellum punctured as on pronotum, equilaterally triangular. Angle between pronotum and elytra not marked in dorsal outline.

Elytra oblong, with slightly explanate lateral margins, widest in basal 1/3, punctation stronger than on pronotum, punctures deep, separated by ca. 1.0 diameter; humeri well marked; EL/EW 1.2; EL/PL 5.1; EW/ PW 1.4.

Legs moderately long. Hind tibial spurs well developed, dorsal one weakly curved, unmodified, as long as 3/4 length of tarsomere 1, and over twice as long as ventral one; ventral spur weakly curved.

Ventrite 1 with sparse setation in mesal portion, and short longitudinal ridge, ventrite 2 with basal row of big punctures. Apex of tergite 7 unmodified. Apex of ventrite 5 subtly emarginated.

Sternite 9 (L 0.47, W 0.33) elongated, consisting of two subrectangular hemisternites, with moderately long setae at apical margin, which are dense in mesal portion. Tergite 8 (L 0.62, W 0.45) moderately sclerotized, apical portion subtrapezoidal, bearing indistinct setae on apical margin, apodemes moderately long, diverging basally; tergite 9 (0.29, W 0.48) small, moderately sclerotized, with wide apical portion and minute setae at apex, with a pair of short apodemes strongly diverging basally, apodemes fused anteriorly. Tegmen (L 0.55, W 0.40) large, well sclerotized, parameres straight, widening and incurved apically, apices with large denticles, mesal process very narrow, widened at apex, reaching half of the length of parameres. Penis (L 0.23, W 0.12) small, elongate oval, parameroids indistinct.

Female unknown.

Variability. TL/EW 1.3–1.4 (1.4)

Measurements. Males (n = 3): TL 3.10–3.45 (3.29), PL 0.53–0.65 (0.58), PW 1.55–1.75 (1.65), EL 2.68– 3.14 (2.84), EW 2.23–2.58 (2.42).

Distribution. N Vietnam.

Etymology. Locotypically, after Na Hang in N Vietnam.