Drosophila (Dudaica) gracilipalpis Katoh & Gao

Katoh, Takehiro K., Zhang, Guang, Toda, Masanori J., Suwito, Awit & Gao, Jian-Jun, 2018, A revision of the subgenus Dudaica Strand of the genus Drosophila Fallen, with descriptions of six new species (Diptera, Drosophilidae), ZooKeys 781, pp. 19-50: 19

publication ID

http://dx.doi.org/10.3897/zookeys.781.27354

publication LSID

lsid:zoobank.org:pub:8035F589-CED1-4CC3-AE43-B737FF782157

persistent identifier

http://treatment.plazi.org/id/A1FE2033-50A4-40D8-BAD0-0BA5B93B4890

taxon LSID

lsid:zoobank.org:act:A1FE2033-50A4-40D8-BAD0-0BA5B93B4890

treatment provided by

ZooKeys by Pensoft

scientific name

Drosophila (Dudaica) gracilipalpis Katoh & Gao
status

sp. n.

Drosophila (Dudaica) gracilipalpis Katoh & Gao  sp. n. Figures 2B, 4, 5, 6B, 8B, 9B, 11

Type material.

Holotype ♂ (#00484): CHINA: Wangtianshu, Mengla, Yunnan, ca. 670 m a.s.l., 22‒25.iv.2007, JJ Gao ( KIZ).

Paratypes. INDONESIA: 1♂ (#03902), Bogor, West Java, 14‒15.xi.2009, MJ Toda ( MZB). CHINA: 1♂ (#00033), Xishuangbanna Tropical Botanical Garden, Mengla, Yunnan, ca. 650 m a.s.l., 19.iii.2006, MJ Toda & KT Takano ( KIZ); 1♂ (#03423), same except for 27‒28.ix.2011, JJ Gao ( KIZ); 1♂ (#06001), same except for 28.ix.2011, JJ Gao ( KIZ); 1♀ (#00485), same data as holotype ( KIZ); 4♂, 1♀ (#00491, #00492, #03364, #03424, #03425), same except for 30.ix.2011 ( KIZ).

Diagnosis.

Palpus long, sinuate, with several stout setae only on basal portion (Figure 9B). Foreleg tibia with one apical seta (Figure 11A). Cercus with distinct caudoventral process (Figure 11F). Hypandrium pubescent, but very indistinctly, on caudolateral lobes (Figure 11J).

Description

(characters in common with D. malayana  not repeated). Adult ♂ and ♀. Head (Figures 2B, 4-6B, 8B, 9B): Arista with 7-8 dorsal and 3-4 ventral branches. Supracervical setae 26-27 per side; postocular setae 12-14 per side. Cibarium with ca. ten medial and ca. nine posterior sensilla per side. Prementum with six (one proximal, three lateral, and two distal) pairs of setae.

Thorax (Figure 2B): Postpronotal lobe with two prominent and rarely 1-2 short setae. Stripes on thoracic pleura mostly confluent with each other.

Abdomen (Figure 2B): Anterior bands on tergites 5 and/or 6 (and 7 in female) medially broadly interrupted.

Male terminalia (Figure 11 B–L): Epandrium with ca. two and 10-12 long setae per side on caudodorsal and ventral portions, respectively. Cercus with 22-24 setae. Surstylus with 8-9 prensisetae and ca. seven ventral spines. Paramere ventrosubapically with one sensillum (longer in Indonesian specimen than in Chinese ones). Aedeagal apodeme ca. 1/2 length of aedeagus.

Female terminalia (Figure 11 M–O): Tergite 8 with 4-5 small setae on ventral portion but no on caudodorsal portion. Oviscapt valve with three lateral and 12-13 marginal ovisensilla. Spermathecal capsule apically slightly narrowed, slightly broader than long.

Measurements (in mm): BL = 2.20 in holotype (range in 8♂/2♀ paratypes: 1.63 –2.50/2.03– 2.63), ThL = 1.00 (0.88 –1.06/0.98– 1.06), WL = 1.84 (1.60 –2.15/2.03– 2.10), WW = 0.92 (0.83 –1.04/1.02– 1.06).

Indices. FW/HW = 0.59 (range in 8♂ and 2♀, or less if noted, paratypes: 0.58-0.63), ch/o = 0.12 (0.07-0.13), prorb = 0.65 (6♂, 2♀: 0.46-0.63), rcorb = 0.30 (7♂, 2♀: 0.20-0.37), vb = 0.45 (7♂, 2♀: 0.22-0.60), orbito = 0.63 (0.50-0.64), dcl = 0.72 (0.63-0.79), sctl = 1.26 (7♂, 1♀: 0.94-1.12), sterno = 0.56 (0.44-0.71), dcp = 0.38 (0.41-0.57), sctlp = 0.95 (0.91-1.00), C = 1.70 (1.56-2.00), 4c = 1.45 (1.32-1.58), 4v = 2.05 (1.83-2.26), 5x = 2.38 (1.80-2.43), ac = 2.90 (2.87-3.29), M = 0.90 (0.75-0.95), C3F = 0.56 (0.52-0.59).

Distribution.

Indonesia (West Java), China (Yunnan).

Etymology.

Referring to the long and thin palpus.

Remarks.

This species closely resembles the foregoing species, D. malayana  , in having the long, sinuate palpus and pubescent caudolateral lobe of hypandrium, but can be distinguished from the latter by having only one apical seta on foreleg tibia.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

ORDO

Family

FAMILIA

Genus

Drosophila