Caccothryptus taiwanus, Yoshitomi, 2015

Yoshitomi, Hiroyuki, 2015, Four new species of the genus Caccothryptus (Coleoptera, Limnichidae), European Journal of Taxonomy 147, pp. 1-17 : 3-6

Caccothryptus taiwanus sp. nov.

urn:lsid:zoobank.org:act:578B475A-54DA-4600-9FFF-F5E7045F814E

Figs 1A , 2 A–E, 4A–B

Diagnosis

Smaller species in the genus; TL = 3.73–4.05 mm in male, 3.75–4.20 mm in female; parameres weakly pointed in lateral view; apical emargination of parameres deeply U-shaped, with small projections in inner margins.

Etymology

The species is named after the type locality.

Material examined

Holotype

TAIWAN: ♂ ( TARI), “Taiwan: Ilan Fushan ---- [Chinese characters] 13. IV. 2011, leg. C. F. Lee ”.

Paratypes

TAIWAN: 2 ♂♂, 7 ♀♀, 13 ex. ( TARI, EUMJ, NMW), same data as for the holotype; 1 ex. ( TARI), “ Taiwan: Nantou Nanshanchi 25. VII. 2008, leg. W.-T. Liu”; 1 ♂, 1 ex. ( SEHU), “ TAIWAN: NANTOU Nanshanchi 900 28. III. 1982 Col. T. FUJISAWA”; 1 ♂ ( EUMJ), “[ TAIWAN] Wulu Alt. ca. 700 m Haiduan Township Taitung Country ---- [Chinese characters] 17–18. VI. 2011 J. Yamasako leg.”; 1 ♀ ( EUMJ), “( TAIWAN) Hsinhsien~Wulai Taipei Hsien 2. VII, 1970 Y. Hori leg.”.

Description

Male

Body ( Fig. 1A ) oblong, convex dorsally and ventrally, shiny, densely covered with short and long silver setae. Coloration of body black; legs and antennae paler.

Head densely punctate, slightly convex dorsally. Antennae relatively long, reaching about proximal 1/4 of elytra. Pronotum punctate as in head; PW/PL 1.90–2.11 (2.03). Scutellar shield equilateral triangular, finely punctate, lateral margins straight. Elytra oblong, widest at middle, lateral margins gently arcuate, coarsely and irregularly punctate; space between punctures same as their diameter; adpressed long silver setae forming obvious zigzag, irregular markings; apex obtuse; humeral parts weakly projecting dorsally; EL / EW 1.17–1.37 (1.31), EL / PL 3.00–3.50 (3.26), EW / PW 1.17–1.37 (1.23), TL / EW 1.53–1.78 (1.72). Each claw on foreleg of same size and shape.

Sternite VIII ( Fig. 2D ) U-shaped, bearing short setae in apical parts. Sternite IX ( Fig. 2E ) elongate, with long and stout lateral projections. Aedeagus ( Fig. 2 A–C) stout, straightly curved ventrally in apical part, punctate in apical part of median lobe and parameres; median lobe wide in lateral view, rather pointed at apex; apical emargination of parameres deeply U-shaped, with small projections in inner margins; apices of parameres rounded in ventral view, weakly pointed in lateral view.

Female

Sexual dimorphism indistinct; PW / PL 1.65–2.26 (2.02), EL / EW 1.23–1.34 (1.30), EL / PL 2.65–3.56 (3.25), EW / PW 1.20–1.28 (1.23), TL / EW 1.60–1.79 (1.71). Ovipositor ( Fig. 4B ) well sclerotized; coxite closely punctuate, pointed at apices, about 1.18 times as long as spiculum ventrale ( Fig. 4A ); approximate ratio of coxite and baculus (n = 1) 1.0: 3.43.

Measurements

Males (n = 5): TL 3.73–4.05 (3.90) mm, PW 1.80–1.90 (1.86) mm, PL 0.88–1.00 (0.92) mm, EL 2.85– 3.15 (2.98) mm, EW 2.10–2.50 (2.28) mm.

Females (n = 8): TL 3.75–4.20 (4.02) mm, PW 1.80–2.03 (1.90) mm, PL 0.85–1.15 (0.95) mm, EL 2.90–3.20 (3.07) mm, EW 2.20–2.50 (2.35) mm.

Distribution

Only known from the type locality, Taiwan.

Remarks

This species belongs to the testudo species group (sensu Hernando & Ribera 2014). It resembles C. sinensis Hernando & Ribera, 2014 , known from Fujian, China, in the shape of the parameres, which are broadly and deeply emarginated, and differs from it in the following male genital characteristics: apex of the median lobe rather rounded (rather pointed in C. sinensis ); median lobe straightly projecting posteriorly (curved postero-ventrally in C. sinensis ).

Figures

Fig. 1. Habitus of Caccothryptus spp., holotypes, ♂♂. A. Caccothryptus taiwanus sp. nov. B. C. orion sp. nov. C. C. tibetanus sp. nov. D. C. chayuensis sp. nov. Scales = 1.0 mm.

Fig. 2. Male genitalia of Caccothryptus spp. A–E. Caccothryptus taiwanus sp. nov. F–J. C. orion sp. nov. — A–C, F–H. Aedeagus in ventral (A, F), dorsal (B, G) and lateral (C, H) views. D, I. Sternite VIII. E, J. Sternite IX.

Fig. 4. Female genitalia of Caccothryptus spp. A–B. Caccothryptus taiwanus sp. nov. C–D. C. orion sp. nov. E–F. C. tibetanus sp. nov. — A, C, E. Spiculum ventrale. B, D, F. Ovipositor.