Elmomorphus longitarsis Selnekovič, Jäch & Kodada, 2024, sp. nov.
Creators: name: Selnekovič, Dávid
name: Jäch, Manfred A.
name: Kodada, Ján
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dryopidae
Elmomorphus
Elmomorphus longitarsis

description: Elmomorphus longitarsis sp. nov.
urn:lsid:zoobank.org:act: 6F6843C0-4D46-4CF6-BD01-81D340EF2901
Figs 52–53, 55C, 111F
Differential diagnosis
Elmomorphus longitarsis sp. nov. (Fig. 52) 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 for E. longitarsis, Fig. 51 for E. yunnanensis), and the different positions of the microsclerites of the bursa copulatrix (Fig. 55C). From E. bispinosus it differs in the slenderer body and the microsclerites of the bursa copulatrix (for E. bispinosus see Figs 54, 55D, for E. longitarsis see Figs 52, 55C).
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). 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): 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).
Secondary sexual dimorphism
Females slightly larger than males.
Distribution
Thailand (Fig. 111F).
description: Published as part of 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), pp. 1-229 in European Journal of Taxonomy 957 on pages 112-115, DOI: 10.5852/ejt.2024.957.2651, http://zenodo.org/record/13773385