Dettopsomyia serripenis Wang & Gao, 2021

Wang, Ya-Lian, Li, Qiao, Toda, Masanori J. & Gao, Jian-Jun, 2021, The genus Dettopsomyia Lamb, 1914 (Diptera, Drosophilidae) from southern China, ZooKeys 1056, pp. 73-94 : 73

Dettopsomyia serripenis Wang & Gao sp. nov.

Figure 5

Material.

Holotype: ♂ (#00152), Xishuangbanna Tropical Botanical Garden , the Chinese Academy of Sciences , Menglun , Mengla, Xishuangbanna, Yunnan, China, ca. 570 m (21.92°N, 101.28°E), 19.iii.2006, ex Zingerberaceae flower (M.J. Toda) (KIZ) . Paratypes: China: 1♂ (#00153), same data except for 24.iii.2006 , ex Alocasia odora ; 1♀ (#00154), same data except for 25.iii.2006 ; 2♂, 2♀ (#00155-158), same data except for habitat (host plant unknown) (M.J. Toda) (KIZ, SEHU) .

Diagnosis.

This species is characteristic in sharing the spotted wings (Fig. 5C ) with three known species of Dettopsomyia , De. formosa ( Lamb 1914: fig. 33; Hardy 1965: fig. 20b), De. jacobsoni ( Duda 1926: fig. 3) and De. preciosa ( de Meijere 1911: fig. 49; Duda 1924: fig. 39), but differs in CS-code (AbCD??GHiJK?M) from them: De. formosa (ABCDEFGHiJKlM), De. jacobsoni (ABCDEFGHIJKLM) and De. preciosa (ABCDefGHIJKLm) (Table 3 ).

Description.

(♂, ♀; not repeating characters common to De. acutipenis sp. nov.). Head (Fig. 5A, B ): Ocellar setae located just outside triangle made by ocelli. Frons yellow, with blackish brown stripes. Face gray. First flagellomere black.

Thorax (Fig. 5A, B ): Scutum, scutellum, and thoracic pleura yellow. Scutum with confluent stripes. Scutellum with somewhat H-shaped, dark marking medially and dark stripes covering bases of ipsilateral scutellar setae laterally. Acrostichal setulae in 2-4 vestigial rows. Dorsocentral setae two pairs.

Wing (Fig. 5C ) grayish yellow, black to blackish brown basally, with four dark spots along anterior margin and 14 scattered, pale spots. Veins brown. R2+3 waved, strongly curved to costa apically; R4+5 and M1 distally diverged from each other.

Legs (Fig. 5A ) pale brown.

Abdomen (Fig. 5D, E ): Tergites blackish brown, laterally with yellowish spots: one per side on tergite II, two per side on tergites III-VI.

Male terminalia (Fig. 5F-I ): Epandrium with three setae per side laterally; ventral lobe short, narrow, apically round and sclerotized like peg, with two small setae subapically. Surstylus with prensisetae arranged in V-shape (approximately seven on caudal margin and 6-8 in oblique row on outer surface; one or two dorsalmost on outer surface somewhat separated from others), several upward-curved setae on ventral to subventral portion of inner surface and one or two trichoid setae on outer surface near base of epandrial ventral lobe. Cercus broadly fused to epandrium, pubescent anteriorly, with approximately 28 setae; several setae along caudoventral margin shorter. Hypandrium somewhat trapezoid; apodeme anteriorly truncate, twice as wide as long. Paramere fused to hypandrium, not pubescent but with a single setula. Aedeagus distally membranous, subapically dilated and serrated on lateral margins around gonopore, apically sharply pointed; apodeme as long as aedeagus.

Female terminalia (Fig. 5J-L ): Oviscapt with one trichoid and two peg-like lateral ovisensilla and 15 marginal peg-like ovisensilla more loosely arranged anteriorly; distal portion approximately 1/4 of whole length, convex on dorsal margin in lateral view. Spermathecal capsule as broad as long, finely wrinkled on basal half, with shallow apical indentation; introvert ca. 4/5 height of outer capsule.

Measurements: BL = 1.51 mm in holotype (range in 3♂ paratypes: 1.41-1.66 mm; range in 3♀ paratype: 1.53-1.80 mm); ThL = 0.57 (0.57; 0.58-0.62) mm; WL = 1.37 (1.34-1.41; 1.47-1.52) mm; WW = 0.73 (0.66-0.71; 0.71-0.74) mm.

Indices: arb = 3/2 (range in 3♂, 3♀, or less if noted, paratypes: 3 or 4/2), FW/HW = 0.60 (0.59-0.62), ch/o = 0.38 (0.33-0.47), prorb = 0.60 (0.49-0.70), rcorb = 0.20 (0.20-0.23), vb = 0.35 (0.34-0.67), dcl (anterior dorsocentral seta/posterior dorsocentral seta in length) = 0.74 (0.82-0.89), sctl = (n/a)/(1♂: 0.90), sterno = 0.71 (0.44-0.68), orbito = 0.29 (0.21-0.26), dcp (distance between ipsilateral dorsocentral setae/distance between anterior dorsocentral setae) = 0.71 (0.65-0.81), sctlp = 1.27 (1.03), C = 1.00 (0.89-1.16), 4c = 2.51 (1.71-2.79), 4v = 2.24 (1.79-2.82), 5 × = 1.90 (1.68-2.01), ac = 2.78 (2.13-3.05), M = 0.87 (0.84-1.10), C3F = 0.52 (0.54-0.69).

Distribution.

China (Yunnan).

Etymology.

Referring to the serrated, lateral margins of the gonopore of the aedeagus.

Figures

Figure 5. Dettopsomyia serripenis Wang & Gao, sp. nov. (A-I # 00152, J-L paratype # 00156) A left lateral habitus B head and thorax (dorsal view) C wing (right, dorsal view) D abdomen (lateral view) E abdomen (dorsal view) F periphallic organs (posterolateral view) G surstylus H phallic organs (ventral view) I phallic organs (dorsolateral view) J oviscapt (lateral view) K oviscapt (ventral view) L spermatheca. Scale bars: 1.0 mm (photograph) or 0.1 mm (line drawing).