Zarcosia barclayi, 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 : 153-154

Zarcosia barclayi n. sp.

( Figures 1 ; 3i,j ; 4a ; 6g )

Etymology. The species is named after Max Barclay in acknowledgment of his unflagging support over two decades to guide me through the insect research collections of the British Museum of Natural History.

Type locality. Malaysia: Sarawak, Gunung Mulu National Park , Deer Cave [04°05’’ N 114° 53’ E] .

Distribution. Malaysia ( Figure 1 ).

Description. ( Figure 3i,j ). Body length. ♂: 1.74± 0.02 mm (n=2); ♀: 1.96± 0.13 mm (n=7). Dark brown, densely covered with silver applied pubescence. Appendages orange to brown.

Head. Wider than pronotum in males, as wide as pronotum in females. Palpi orange, last article securiform. Integument mat, finely rugose.

Antennae. A fourth to a third longer than elytra in males, shorter than elytra in females, orange, slightly and progressively thicker toward apex. Antennomere 4 and higher with a slight serration.

Pronotum ( Figure 6g ). Subcylindrical, convex, slightly longer than wide, marked by a strong lateral constriction on each side.

Elytra. Length: ♂: 1.20± 0.07 mm (n=2); ♀: 1.21± 0.08 mm (n=7). Finely and densely punctuated, covered with double pubescence. Moderately convex, depressed on disc.

Legs. No notable sexual characters. Male foretibia with a faint sinuation of their inner side.

Aedeagus ( Figure 4a ). Simple, narrow, progressively tapered, slightly and regularly bent in lateral view. Appendages visible near apex.

Type material. Holotype (♂, BMNH). Malaysia: Sarawak, Gunung Mulu National Park , Deer Cave, 04°07’’ N 114° 53’ E (360 m) (P. M. Hammond & J. E. Marshall leg.) 6.V.1978 . Paratypes. Malaysia: Sarawak, Gunung Mulu National Park , Deer Cave, 04°07’’ N 114° 53’ E (360 m) (P. M. Hammond & J. E. Marshall leg.) 6.V.1978 (3 ♀ paratypes, BMNH) . Sarawak, Gunung Mulu National Park , Clearwater Cave, 04°07’ N 114°55’ E (360 m) (P. M. Hammond & J. E. Marshall leg.) 13.V.1978 (1 ♀ paratype, BMNH) , 20.V.1978 (2 ♀ paratypes, BMNH; 1 ♀ paratype, 1 ♂ paratype, NGPC) .

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 3. Habitus of new Zarcosia species. a, Z. lemairei n. sp., ♂ holotype, from Laos. b, Z. lemairei n. sp., ♀ paratype, from Laos. c, Z. ilonae n. sp., ♂ holotype, from Thailand. d, Z. gerstmeieri n. sp., ♂ holotype, from Vietnam. e, Z. weigeli n. sp., ♂ holotype, from China (Yunnan). f, Z. deharvengi n. sp., ♂ holotype, from Republic of Indonesia (Sumatra). g, Z. sumatrensis n. sp., ♂ holotype, from Republic of Indonesia (Sumatra). h, Z. sumatrensis n. sp., ♀ paratype, from Republic of Indonesia (Sumatra). i, Z. barclayi n. sp., ♂ holotype, from Malaysia. j, Z. barclayi n. sp., ♀ paratype, from Malaysia. k, Z. schawalleri n. sp., ♂ holotype, from Malaysia. l, Z. schawalleri n. sp., ♀ paratype, from Malaysia. m, Z. bedosae n. sp., ♂ holotype, from Laos. n, Z. sinuata n. sp., ♂ holotype, from Thailand. o, Z. sinuata n. sp., ♀ paratype, from Thailand. p, Z. spinifemur n. sp., ♂ holotype, from Sri Lanka. q, Z. dentatifemur (Pic, 1912), ♂ holotype, from Sri Lanka, after remounting (same specimen as in Fig. 2o). r, Z. srilankaensis n. sp., ♂ paratype, from Sri Lanka. s, Z. intermedia n. sp., ♂ paratype, from Sri Lanka. s, Z. brunnea n. sp., ♂ paratype, from Sri Lanka. Scale bars: 0.5 mm.

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 6. Thoraces of selected Zarcosia species in dorsal view. a, Z. lemairei n. sp., ♂ holotype, from Laos (left) and Z. lemairei n. sp., ♀ paratype, from Laos (right). b, Z. ilonae n. sp., ♂ holotype, from Thailand. c, Z. gerstmeieri n. sp., ♂ holotype, from Vietnam. d, Z. weigeli n. sp., ♂ holotype, from China (Yunnan). e, Z. deharvengi n. sp., ♂ holotype, from Republic of Indonesia (Sumatra). f, Z. sumatrensis n. sp., ♂ holotype, from Republic of Indonesia (Sumatra) (left) and Z. sumatrensis n. sp., ♀ paratype, from Republic of Indonesia (Sumatra) (right). g, Z. barclayi n. sp., ♂ holotype, from Malaysia (left) and Z. barclayi n. sp., ♀ paratype, from Malaysia (right). h, Z. schawalleri n. sp., ♂ holotype, from Malaysia (left) and Z. schawalleri n. sp., ♀ paratype, from Malaysia (right). i, Z. bedosae n. sp., ♂ holotype, from Laos. j, Z. sinuata n. sp., ♂ holotype, from Thailand (left) and Z. sinuata n. sp., ♀ paratype, from Thailand (right). k, Z. dentatifemur (Pic, 1912), holotype, from Sri Lanka. l, Z. intermedia n. sp., ♂ paratype, from Sri Lanka. m, Z. srilankaensis n. sp., ♂ paratype, from Sri Lanka. n, Z. spinifemur n. sp., ♂ holotype, from Sri Lanka. o, Z. brunnea n. sp., ♂ paratype, from Sri Lanka. Scale bars: 100 µm.