Drosophila (Dudaica) dissimilis 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

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Drosophila (Dudaica) dissimilis Katoh & Gao

sp. n.

Drosophila (Dudaica) dissimilis Katoh & Gao  sp. n. Figures 3C, 4G, 5G, 7C, 8G, 9G, 16

Type material.

Holotype ♂ (#00430): CHINA: Hesong, Xiding, Menghai, Yunnan, ca. 1,900 m a.s.l., 7.iv.2011, JJ Gao ( KIZ).


Palpus short, club-shaped, medio- to baso-laterally dark grayish brown, with one prominent seta apically and several long setae ventrally (Figure 9G). Cercus without caudoventral process (Figure 16E). Paramere apically somewhat quadrate in lateral view (Figure 16J), ventroapically with three sensilla (Figure 16I, J). Aedeagus distally dilated laterally, somewhat lunate in lateral view (Figure 16 F–H).


(characters in common with D. orthophallata  sp. n. not repeated). Adult ♂. Head (Figures 3C, 4G, 5G, 7C, 8G, 9G): Longest axis of eye nearly rectangular to body axis. Frontal vitta grayish white. Fronto-orbital plate slightly grayish; anterior reclinate orbital seta situated between proclinate and posterior reclinate orbital setae. Occiput and postgena dark brown, marginally milky white. Arista with six dorsal and three ventral branches. Supracervical setae 16-19 per side; postocular setae 17-19 per side. Cibarium slightly thickened on anterior margin; medial sensilla ca. nine per side and posterior sensilla ca. nine per side; first and second medial sensilla weaker than and anteriorly apart from others. Clypeus not thickened at median portion, laterally dark brown.

Thorax (Figure 3C): Postpronotal lobe pale brownish white in upper half, dark brown in lower half; setae broken. Dorsocentral and scutellar setae broken. Notopleuron pale brownish white. Thoracic pleura nearly entirely dark brown, without stripes.

Wing (Figure 3C) slightly wrinkled at basal portion of R4+5; longitudinal veins pale brown except for basal section of M1 (brown) and CuA1 (brown).

Legs (Figure 3C) pale grayish yellow to pale yellow. Foreleg first tarsomere shorter than total length of four succeeding tarsomeres. Mid- and hind-leg first tarsomeres slightly shorter than total length of four succeeding tarsomeres, without subproximal spine.

Abdomen (Figure 3C): Tergites pale brown, each with dark brown caudal band narrower than ca. 1/2 of tergite but laterally extended anteriorly.

Male terminalia (Figure 16): Epandrium with ca. two and ca. 16 long setae per side on caudodorsal and ventral portions, respectively. Cercus with 30-31 setae. Surstylus with ca. eight prensisetae and ca. ten ventral spines; basal sclerotized ridge indistinct. Tenth sternite flat, not wrinkled. Hypandrium somewhat oval in anterior portion. Aedeagal apodeme apically not flattened, slightly shorter than aedeagus.

Measurements (in mm): BL = 2.33 in holotype, ThL = 1.04, WL = 2.35, WW = 1.16.

Indices. FW/HW = 0.60, ch/o = 0.08, prorb = n/a, rcorb = n/a, vb = n/a, orbito = 0.78, dcl = n/a, sctl = n/a, sterno = 0.62, dcp = 0.65, sctlp = 0.94, C = 2.09, 4c = 1.21, 4v = 1.95, 5x = 1.24, ac = 2.83, M = 0.64, C3F = 0.53.


China (Yunnan).


Referring to the morphological difference from the other species in the subgenus Dudaica  .


This species is the most different in morphology from the other Dudaica  species, such as the shape of palpus and parameres, apical prominent seta on palpus, and number of sensilla on parameres. Those characters are also seen in many other species than Dudaica  , suggesting the plesiomorphic states of these characters.