Mexico borneensis, 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 : 30-32

publication ID

https://doi.org/ 10.5852/ejt.2019.583

publication LSID

lsid:zoobank.org:pub:4F834ADD-57E7-4CE3-B16A-127F1BE4AE14

DOI

https://doi.org/10.5281/zenodo.5386757

persistent identifier

https://treatment.plazi.org/id/C119FDE3-9A59-4A07-A77A-AF4C067C5D1B

taxon LSID

lsid:zoobank.org:act:C119FDE3-9A59-4A07-A77A-AF4C067C5D1B

treatment provided by

Plazi

scientific name

Mexico borneensis
status

sp. nov.

Mexico borneensis sp. nov.

urn:lsid:zoobank.org:act:C119FDE3-9A59-4A07-A77A-AF4C067C5D1B

Figs 11A View Fig , 16 View Fig

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 View Fig ) 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 View Fig ) small, slightly sclerotized, Y-shaped. Sternite IX ( Fig. 16C View Fig ) well sclerotized, lightly curved in basal part; apical plates long and stout, pointed at apices.

AEDEAGUS ( Fig. 16 View Fig 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 View Fig ) similar to that of male, but lacking extra setae. Urosternite ( Fig. 16H View Fig ) well sclerotized, T-shaped, with long and slender apodeme. Ovipositor ( Fig. 16I View Fig ) 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.).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Limnichidae

Genus

Mexico

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