Mexico borneensis Yoshitomi 2019, sp. nov.
Creators: name: Yoshitomi, Hiroyuki
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Limnichidae
Mexico
Mexico borneensis

description: Mexico borneensis sp. nov.
urn:lsid:zoobank.org:act: C119FDE3-9A59-4A07-A77A-AF4C067C5D1B
Figs 11A, 16
Etymology
This species is named after its type locality.
Material examined
Holotype MALAYSIA • ♂; “BRITISH N BORNEO Labuan Island Nov. 28–29, 1958 ”; “Intertidal Zone”; “ L. W. Quate Collector ”; BPBM.
Paratypes MALAYSIA • 1 ♀; same collection data as for holotype; BPBM • 1 ♂, 1 ex.; “BRITISH N BORNEO Labuan Island Nov. 28–29, 1959 ”; “ Intertidal Zone ”; “ Maa Collector ”; 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, slightly convex on dorsum between eyes; distance between eyes about 0.8 times as long as eye diameter in dorsal view.
ANTENNAE. Short, reaching about anterior third of pronotum.
PRONOTUM. Closely punctate; lateral margins gently arcuate; PW/ PL 2.04–2.30 (2.20). Scutellum small, square.
ELYTRA. Oval, widest at base, gently tapered posteriorly; caudal quarter of lateral margins slightly and minutely serrate; EL/ EW 1.33–1.48 (1.38); EL/ PL 3.11–3.70 (3.35); EW/ PW 1.09–1.14 (1.11); TL/ EW 1.73–1.88 (1.79).
ABDOMEN. Sternite VII (Fig. 16A) with two pairs of long and stout extra setae, bearing about 20 long setae, bifid in postero-lateral corners, gently projecting triangularly in median part of caudal margin. Sternite VIII (Fig. 16B) small, slightly sclerotized, Y-shaped. Sternite IX (Fig. 16C) well sclerotized, lightly curved in basal part; apical plates long and stout, pointed at apices.
AEDEAGUS (Fig. 16 D–F). Long and slender, almost symmetrical; basal piece oval; lateral lobes short, with 4 apical setae; median lobe long and slender, subparallel-sided near base to near apex, finely punctuate, with nipple-like apex; ventral plates long and slender, reaching about apical tenth of median lobe, mostly fused to median lobe; ML/ BL 2.36; ML/ LL 2.57.
Female
Sexual dimorphism slight. Sternite VII (Fig. 16G) similar to that of male, but lacking extra setae. Urosternite (Fig. 16H) well sclerotized, T-shaped, with long and slender apodeme. Ovipositor (Fig. 16I) well sclerotized; coxite sparsely punctuate, obtuse at apices; apex of baculus bifid; approximate ratio of coxite and baculus (n = 1) 1.0: 5.5.
Measurements
Unsexed (n = 3): TL 1.70–1.88 (1.81) mm; PW 0.90–0.92 (0.91) mm; PL 0.40–0.45 (0.42) mm; EL 1.30– 1.48 (1.39) mm; EW 0.98–1.05 (1.01) mm.
Distribution
Malaysia (Labuan Island, off Borneo).
Remarks
This species is similar to M. baliensis sp. nov. in the shape of the aedeagus, but differs from it in the following characteristics: median lobe pointed at apex (obtuse in M. baliensis sp. nov.) and lateral lobes bearing 4 apical setae (3 in M. baliensis sp. nov.).
description: Published as part of Yoshitomi, Hiroyuki, 2019, Review of the Asian Thaumastodinae (Coleoptera, Byrrhoidea, Limnichidae), with a phylogeny of the genera, pp. 1-45 in European Journal of Taxonomy 583 on pages 30-32, DOI: 10.5852/ejt.2019.583, http://zenodo.org/record/3564532