Zarcosia palliditarsis (Pic, 1912) 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 : 166

Zarcosia palliditarsis (Pic, 1912) , comb. nov.

( Figures 1 ; 2t ; 4k ; 5 e–g)

Hylophilus palliditarsis Pic, 1912: 274 ; Type: MNHN (1 male “ syntype ”); BMNH (2 male “co-types”)

Xylophilus palliditarsis Pic, 1912 : Champion, 1915

Zarcosia palliditarsis (Pic, 1912) : unpublished combination in Grzymala, 2016

This species and Zarcosia lemairei n. sp. are remarkable among all Zarcosia species discussed in this work by the morphology of the male head ( Fig. 5 a–c, e–g). In both cases, the head capsule is carved dorsally and possesses a wavy brush of long yellow bristles. This sexually dimorphic trait is reminiscent of cephalic modification in some Scydmaenus species (Scydmanenidae), while these bristles are similar to the trichomes present in Paussinae Carabidae and other inquilines.

Zarcosia palliditarsis (Pic, 1912) may very well be a junior synonym of Euglenus planipennis Motschulsky, 1863 , also from Sri Lanka. The type material of this species is presumably kept in St. Petersburg or in Moscow and I did not manage to locate it. It is not possible on the sole basis of Motschulsky’s description, 1863 to clarify the taxonomic status of this species.

Type locality. Sri Lanka: Kandy .

Distribution. Sri Lanka ( Figure 1 ).

Material examined. Sri Lanka: Kandy (G. E. Bryant) VI.1908 (1 ♂ and 1 ♀ syntype, MNHN; 2 ♂ co-types, 1 ♂ and 2 ♀, BMNH) .

Figures

FIGURE 1. Distribution of Zarcosia species across South Asia. New taxa are indicated in boldface. For Z. lemairei n. sp., the broader geographical range is highlighted with a red area with a dotted line.

FIGURE 2. continued next page.

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.

FIGURE 5. Morphological details of selected Zarcosia species. a–d, Z. lemairei n. sp., ♂ holotype, from Laos: head in lateral (a), frontal (b) and dorsal (c) views; mesothoracic (left) and metathoracic (right) tarsae (d). e–g, Z. palliditarsis (Pic, 1912), ♂, from Sri Lanka: head in lateral (e), frontal (f) and dorsal (g) views. h, Z. srilankaensis n. sp., ♂ paratype, from Sri Lanka: tuft of pubescence at elytral apex. i, Z. weigeli n. sp., ♂ holotype, from China (Yunnan): elytral pubescence on disc. j, Z. gerstmeieri n. sp., ♂ holotype, from Vietnam: elytral pubescence on disc. k–t: male forelegs of Z. ilonae n. sp., holotype, from Thailand (k); Z. deharvengi n. sp., holotype, from Republic of Indonesia (Sumatra) (l); Z. schawalleri n. sp., holotype, from Malaysia (m); Z. sinuata n. sp., holotype, from Thailand (n); Z. sumatrensis n. sp., holotype, from Republic of Indonesia (Sumatra) (o); Z. srilankaensis n. sp., paratype, from Sri Lanka (p); Z. intermedia n. sp., paratype, from Sri Lanka (q); Z. dentatifemur (Pic, 1912), holotype, from Sri Lanka (r); Z. brunnea n. sp., paratype, from Sri Lanka (s); Z. weigeli n. sp., holotype, from China (Yunnan) (t). u–x: male mesothoracic legs of Z. cephalica (Pic, 1901) from Republic of Indonesia (u); Z. gerstmeieri n. sp., holotype, from Vietnam (v); Z. dentatifemur (Pic, 1912), holotype, from Sri Lanka (w); Z. spinifemur n. sp., holotype, from Sri Lanka (x). Scale bars: 100 µm.