Mexico baliensis, Yoshitomi, 2019

Yoshitomi, Hiroyuki, 2019, Review of the Asian Thaumastodinae (Coleoptera, Byrrhoidea, Limnichidae), with a phylogeny of the genera, European Journal of Taxonomy 583, pp. 1-45 : 24-26

Mexico baliensis sp. nov.

urn:lsid:zoobank.org:act:98D64DE9-6A33-4EBF-A7F9-26F9A7BA409E

Figs 4B , 11D , 13

Etymology

This species is named after its type locality.

Material examined

Holotype

INDONESIA • ♂; “ Bali Is. Indonesia Nusa Dua, Kuta South 16-II-2013 Kiyoshi ANDO leg.”; EUMJ.

Paratypes

INDONESIA • 1 ♂, 3 ♀♀, 2 ex.; same collection data as for holotype; EUMJ • 3 ex.; “ Nusa Dua , North Island 8°47′52.72″ S, 115°14′9.31″ E, Bali, INDONESIA 7–8. VIII. 2010 H. Yoshitomi leg.”; EUMJ • 1 ex.; same collection data as for preceding; NMW • 1 ex.; same collection data as for preceding; BPBM • 4 ♂♂, 4 ♀♀, 13 ex.; “ Nusa Dua , South Island 8°48′6.81″ S, 115°14′16.07″ E, Bali, INDONESIA 8. VIII. 2010 H. Yoshitomi leg.”; 1 ♀ on slide no HY 1141; EUMJ • 3 ex.; same collection data as for preceding; NMW • 3 ex.; same collection data as for preceding; BPBM .

Description

Male

BODY. Oval, slightly convex dorsally, shiny, closely covered with suberect golden setae. Coloration of body black; elytra with small, irregular silver spots consisting of erect setae.

HEAD. Finely punctate, projecting anteriorly between eyes; distance between eyes about 0.8 times as long as eye diameter in dorsal view.

ANTENNAE. Very short, reaching about anterior quarter of pronotum.

PRONOTUM. Closely punctate, gently arcuate on lateral margins; PW/ PL 1.75–2.55 (2.06). Scutellum square.

ELYTRA. Oval, widest at base, gently tapered posteriorly; caudal third of lateral margins serrate; EL/EW 1.32–1.43 (1.38); EL/ PL 2.53–4.00 (3.25); EW/ PW 1.09–1.20 (1.14); TL/ EW 1.67–1.88 (1.81).

ABDOMEN. Sternite VII ( Fig. 13A ) with two pairs (inner and outer) of long and stout setae and two extra pairs of such setae, pointed at postero-lateral corners, slightly projecting on median part of caudal margin. Sternite VIII ( Fig. 13B ) slightly sclerotized, small, Y-shaped. Sternite IX ( Fig. 13C ) moderately sclerotized, slender, curved in basal part; apical plates long, truncate at apices.

AEDEAGUS ( Fig. 13 D–G). Long and slender; basal piece oval, subparallel-sided; lateral lobes short and robust, with 2–3 apical setae; median lobe long and slender, subparallel-sided near base to apex, finely punctuate, pointed at apex; ventral plates long and slender, reaching about apical tenth of median lobe, mostly fused to median lobe; ML/ BL 2.26; ML/ LL 2.72.

Female

Sexual dimorphism slight. Sternite VII ( Fig. 13H ) similar to that of male, but one pair, not two, of extra inner setae. Urosternite ( Fig. 13I ) well sclerotized, Y-shaped, with long and slender apodeme. Ovipositor ( Fig. 13J ) well sclerotized; coxite sparsely punctuate, rather pointed at apices; apex of baculus bifid; approximate ratio of coxite and baculus (n = 1) 1.0: 6.2.

Measurements

Unsexed (n = 20): TL 1.88–2.40 (2.19) mm; PW 0.95–1.13 (1.06) mm; PL 0.40–0.60 (0.52) mm; EL 1.48–1.80 (1.67) mm; EW 1.05–1.30 (1.21) mm.

Distribution

Indonesia (Bali Island).

Remarks

This species is similar to M. borneensis sp. nov. in the shape of the aedeagus, but differs from it in the following characteristics: median lobe obtuse at apex (pointed in M. borneensis sp. nov.); and apical setae on lateral lobes relatively short (long in M. borneensis sp. nov.).

Biological notes

The type series was collected from the surface of wet rocks on a seashore ( Fig. 4B ) together with three species of Laius Guérin-Méneville, 1830 ( Melyridae : L. baliensis Yoshitomi, 2014 , L. satoi Yoshitomi, 2008 and L. pankowi Wittmer, 1999 ) and Parathroscinus sp. ( Limnichidae ) ( Yoshitomi 2008, 2014b).

Figures

Fig. 4. Habitats (A–C) and living adults (D–F) of Asian Thaumastodinae Champion, 1924. A. Dondong River, Pengkol, Yogyakarta special Region, Java, Indonesia (type locality of Acontosceles javanicus Yoshitomi & Putra, 2011 (F) and Pseudeucinetus javanicus Yoshitomi & Putra, 2010 (D)). B. Nusa Dua, Bali, Indonesia (type locality of Mexico baliensis sp. nov.). C. Hirashima, Ogasawara, Japan (type locality of Mexico ogasawaraensis sp. nov.). D. Type locality of Pseudeucinetus javanicus Yoshitomi & Putra, 2010. E. Mexico masamii (Satô, 1994) in Shikinejima, Izu Islands. F. Type locality of Acontosceles javanicus Yoshitomi & Putra, 2011.

Fig. 11. Species of Mexico Spilman, 1972. A. M. borneensis sp. nov., holotype (BPBM). B. M. papuanus sp. nov., holotype (BPBM). C. M. ogasawaraensis sp. nov., holotype (EUMJ). D. M. baliensis sp. nov., holotype (EUMJ). E. M. palauensis sp. nov., holotype (EUMJ). F. M. masamii (Satô, 1994) (EUMJ). G. M. taiwanus (Satô, 1994), paratype (EUMJ). Scale bars: 1.0 mm.

Fig. 13. Mexico baliensis sp. nov., male (A–G) and female (H–K) genitalia (paratypes, EUMJ). A, H. Sternite VII. B. Sternite VIII. C. Sternite IX. D. Aedeagus in dorsal view. E. Aedeagus, ventral view. F. Aedeagus in right lateral view. G. Aedeagus, left lateral view. I. Urosternite. J. Ovipositor. K. Spermatheca.