Zarcosia sumatrensis, Gompel, 2020

Gompel, Nicolas, 2020, Synopsis of the Asian species in the genus Zarcosia Collado & Alonso-Zarazaga 1996 with new combinations and descriptions of fourteen new species, Zootaxa 4838 (2), pp. 151-178 : 174-175

publication ID	https://doi.org/ 10.11646/zootaxa.4838.2.1
publication LSID	lsid:zoobank.org:pub:0AD43D95-7508-466C-980F-CBEF38CA1198
DOI	https://doi.org/10.5281/zenodo.4404275
persistent identifier	https://treatment.plazi.org/id/0AF41C62-6C5E-40C6-8FB6-0F5B93D10D04
taxon LSID	lsid:zoobank.org:act:0AF41C62-6C5E-40C6-8FB6-0F5B93D10D04
treatment provided by	Plazi
scientific name	Zarcosia sumatrensis
status	sp. nov.

Treatment

Zarcosia sumatrensis n. sp.

( Figures 1 View FIGURE 1 ; 3g,h View FIGURE 3 ; 4p View FIGURE 4 ; 5o View FIGURE 5 ; 6f View FIGURE 6 )

Etymology. The species’ name refers to its geographical origin.

Type locality. Republic of Indonesia: Sumatra, Goea Limau Moangkaer [04°14’ N 98°10’ E] GoogleMaps .

Distribution. Republic of Indonesia: Sumatra ( Figure 1 View FIGURE 1 ).

Description. ( Figure 3g,h View FIGURE 3 ). Body length. ♂ holotype: 3.00 mm; ♀: 2.65± 0.19 mm (n=7). Dark brown, darker anteriorly, gracile, covered with very short, pulverulent pubescence. Appendages orange-brown.

Head. Small, dark, barely wider than pronotum. Palpi orange, last article securiform. Integument, finely and densely punctuated, lightly rugose. Occiput lined with a very fine fringe of dense and short silver hairs posteriorly.

Antennae. A third longer than elytra in ♂, as long as elytra in ♀, orange-brown, regularly filiform with antenommeres 3–10 cylindrical.

Pronotum ( Figure 6f View FIGURE 6 ). Round and convex, slightly elongated in ♂, as long as wide in ♀. Sides regularly curved. Surface mat, finely and densely punctuated, covered with dense, pruinose double pubescence.

Elytra. Length: ♂ holotype: 2.00 mm; ♀: 1.95± 0.10 mm (n=7). Punctation fine and shallow, dense (space between points as wide as the points themselves). Disc depressed. Pubescence dense and short, whitish, comprised of short hairs borne from the points and interspersed pulverulent hairs.

Legs. Particularly elongated. Foretibia thickened in a smooth tooth on their inner side ( Figure 5o View FIGURE 5 ). Mesothoracic legs not observed (a single male devoid of mesothoracic legs was present in the type series).

Aedeagus ( Figure 4p View FIGURE 4 ). Sides subparallel in dorsal view, apex tapered in apical fifth, ending with a button. Strongly bent in lateral view, apex with a weak upward deflection. Appendages visible near apex.

Type material. Holotype (♂, BMNH). Republic of Indonesia: Sumatra, Goea Limau Moangkaer , 04°14’ N 98°10’ E (J. C. van der Meer Mohr) 20.III.1932 GoogleMaps . Paratypes. Republic of Indonesia: Sumatra, Goea Limau Moangkaer , 04°14’ N 98°10’ E (J. C. van der Meer Mohr) 20.III.1932 (2 ♀ paratypes, BMNH) GoogleMaps ; Sumatra, Goea Lau Rakit I, 02°20’ N 98°40’ E (J. C. van der Meer Mohr) 5.X.1934 (6 ♀ paratypes, BMNH; 2 ♀ paratypes, NGPC) GoogleMaps .

Note. The extremely thin and elongated appendages of species likely represent adaptations to life in caves.

Figures

FIGURE 4. Aedeagus of selected Zarcosia species. a, Z. barclayi n. sp., holotype, from Malaysia, lateral and dorsal views. b, Z. bedosae n. sp., holotype, from Laos, lateral and dorsal views. c, Z. bipartita (Pic, 1901) from India, lateral view. d, Z. cephalica (Pic, 1901) from Republic of Indonesia, lateral view. e, Z. deharvengi n. sp., holotype, from Laos, lateral and dorsal views. f, Z. gerstmeieri n. sp., holotype, from Vietnam, lateral and dorsal views. g, Z. ilonae n. sp., holotype, from Thailand, lateral and dorsal views. h, Z. kempi (Blair, 1924), holotype, from India, lateral and dorsal views. i, Z. lemairei n. sp., holotype, from Laos, lateral and dorsal views. j, Z. obscuricornis (Pic, 1927) from Vietnam, lateral view. k, Z. palliditarsis (Pic, 1912) from Sri Lanka, lateral view. l, Z. picina (Fairmaire, 1893), lectotype, from Vietnam, lateral view. m, Z. rubrobasalis (Pic, 1921) (slight uncertainty on the identity of this specimen) from Singapore, lateral view. n, Z. schawalleri n. sp., holotype, from Malaysia, lateral and dorsal views. o, Z. sinuata n. sp., holotype, from Thailand, lateral and dorsal views. p, Z. sumatrensis n. sp., holotype, from Republic of Indonesia (Sumatra), lateral and dorsal views. q, Z. troglodytes (Champion, 1916), holotype, from Malaysia, lateral view. r, Z. weigeli n. sp., holotype, from China (Yunnan), lateral and dorsal views. s, Z. spinifemur n. sp., holotype, from Sri Lanka, lateral and dorsal views. t, Z. dentatifemur (Pic, 1912), holotype, from Sri Lanka, lateral and dorsal views. u, Z. srilankaensis n. sp., paratype, from Sri Lanka, lateral and dorsal views. v, Z. intermedia n. sp., paratype, from Sri Lanka, lateral and dorsal views. w, Z. brunnea n. sp., paratype, from Sri Lanka, lateral and dorsal views. Scale bars: 100 µm.