Elmomorphus longitarsis, Selnekovič & Jäch & Kodada, 2024

Selnekovič, Dávid, Jäch, Manfred A. & Kodada, Ján, 2024, Taxonomic revision of the genus Elmomorphus Sharp, 1888. II. Redescription of the genus and review of the species from India, Nepal, Bhutan, Myanmar, China, Thailand, Laos, Cambodia, and Vietnam (Coleoptera: Dryopidae), European Journal of Taxonomy 957, pp. 1-229 : 112-115

publication ID	https://doi.org/ 10.5852/ejt.2024.957.2651
publication LSID	lsid:zoobank.org:pub:9957F2DF-3F31-4B58-84BC-2F8E0F45C6E3
DOI	https://doi.org/10.5281/zenodo.13773536
persistent identifier	https://treatment.plazi.org/id/6F6843C0-4D46-4CF6-BD01-81D340EF2901
taxon LSID	lsid:zoobank.org:act:6F6843C0-4D46-4CF6-BD01-81D340EF2901
treatment provided by	Plazi
scientific name	Elmomorphus longitarsis
status	sp. nov.

Treatment

Elmomorphus longitarsis sp. nov.

urn:lsid:zoobank.org:act:6F6843C0-4D46-4CF6-BD01-81D340EF2901

Figs 52–53 View Fig View Fig , 55C View Fig , 111F View Fig

Differential diagnosis

Elmomorphus longitarsis sp. nov. ( Fig. 52 View Fig ) is characterised by having a plastron on the dorsal cranial surface (except for the anteriorly narrowed area on the vertex) and the lateral sides of the pronotum and elytra. Elytral punctures are scattered, and striae are absent. Similar characters are also present in E. sausai sp. nov., E. umphangicus sp. nov., E. yunnanensis sp. nov., and E. bispinosus sp. nov. Elmomorphus sausai sp. nov. differs in the distinctly wider elytral plastron bands, each band occupying approximately two thirds of elytron width (in midlength), while in E. longitarsis sp. nov., it is approximately one-third. Elmomorphus umphangicus sp. nov. differs in smaller body dimensions (TL in E. longitarsis sp. nov.: ♂♂ 2.93–3.09 mm (n=3), ♀♀ 3.15–3.32 (n =2), while in E. umphangicus : ♂♂ 2.64–2.90 mm (2.76 ± 0.10, n=5), ♀♀ 2.46–3.12 mm (2.83 ±0.30, n=6)), elytra being widest behind midlength and shorter, and in the wider parameres. Elmomorphus longitarsis differs from E. yunnanensis in the less convex body, longer tarsi with terminal protarsomere approximately 1.3× as long as preceding segments combined (versus as long as preceding segments in E. yunnanensis ), shorter and stouter phallobase ( Fig. 53 View Fig for E. longitarsis , Fig. 51 View Fig for E. yunnanensis ), and the different positions of the microsclerites of the bursa copulatrix ( Fig. 55C View Fig ). From E. bispinosus it differs in the slenderer body and the microsclerites of the bursa copulatrix (for E. bispinosus see Figs 54 View Fig , 55D View Fig , for E. longitarsis see Figs 52 View Fig , 55C View Fig ).

Etymology

The epithet is a Latin adjective referring to the long tarsi.

Type material

Holotype

THAILAND – Mae Hong Son Province • ♂; “NW-Thailand, Mae Hong Son distr., Ban Suan Pu , V. 1992, J. Strnad leg.”; NMW.

Paratypes

THAILAND – Mae Hong Son Province • 2 ♂♂, 2 ♀♀; same collection data as for holotype; CKB, NMW.

Type locality

Thailand, Mae Hong Son Province, Ban Suan Pu.

Description

Measurements (mm): TL: ♂♂ 2.93–3.09 (n =3), ♀♀ 3.15–3.32 (n= 2); PL: ♂♂ 0.64–0.71 (n=3), ♀♀ 0.71–0.78 (n =2); PW: ♂♂ 1.23–1.31 (n= 3), ♀♀ 1.27–1.32 (n =2); EL: ♂♂ 2.39–2.50 (n=3), ♀♀ 2.47–2.63 (n=2); EW: ♂♂ 1.48–1.60 (n= 3), ♀♀ 1.53–1.61 (n=2); PhL: 0.52–0.64 (n =2); PrL: 0.37– 0.41 (n =2).

Body oblong oval, moderately convex dorsally ( Fig. 52 View Fig ). Integument black; mouthparts, antennae, and tarsi reddish-brown. Pubescence consists of very short yellowish setae. Plastron present on dorsal surface of head except anteriorly narrowed area on vertex, on lateral sides of pronotum and elytra, and on ventral surface except for prosternal process, median part of metaventrite, median part of ventrite 1 and anteromedian portion of ventrite 2.

Head with small round punctures separated by 0.5–1.0 × puncture diameter. Labrum transverse, anterior margin straight, exposed portion microreticulate, setae concentrated along anterior margin and equal in length in both sexes. Eyes oval, moderately protruding; ID: ♂♂ 0.40–0.49 mm (n=3), ♀♀ 0.41– 0.46 mm (n =2). Antennae 10-segmented, densely setose.

Pronotum transverse, widest at base, moderately convex, PW/PL: ♂♂ 1.84–1.94 (n =3), ♀♀ 1.701– 1.78 (n=2); anterior angles protruding, acute; lateral pronotal sides convergent, weakly rounded; dorsal surface smooth, with round setiferous punctures; plastron bands covering entire lateral pronotal sides. Lateral and posterior edges of prosternal process rounded, lateral portions raised, without clusters of long setae, median keel arcuate. Scutellum longer than wide, acute at apex. Metaventrite with median part weakly convex, without clusters of long setae. Elytra oval, moderately convex, widest around midlength, EL/EW: ♂♂ 1.56–1.61 (n= 3), ♀♀ 1.61–1.63 (n= 2); surface almost inapparently microreticulate, with weak bronze lustre, setiferous punctures scattered; plastron forming wide, posteriorly expanding lateral bands, each covering about half of elytron width at midlength. Tibiae straight, protibia ca 1.15 × as long as protarsus; PrTL/PL: ♂♂ 1.27–1.37 (n =3), ♀♀ 1.18–1.20 (n =2). Terminal protarsomere approximately 1.3× as long as all preceding segments combined.

Ventrites covered with plastron except for entire median portion of ventrite 1 and anteromedian portion of ventrite 2. Aedeagus ( Fig. 53 View Fig ): phallobase rather short and wide, PhL/PrL: 1.42–1.58 (n =2); parameres moderately curved ventrad, apices rounded (lateral aspect); penis rounded at apex; sclerotised fibula present. Bursa copulatrix with four rather large spines laterally on each side ( Fig. 55C View Fig ).

Secondary sexual dimorphism

Females slightly larger than males.

Distribution

Thailand ( Fig. 111F View Fig ).