Phortica (Ashima) kerinciensis Toda, 2020

Toda, Masanori J., Bänziger, Hans, Sati, Pradeep C., Fartyal, Rajendra S., Suwito, Awit & Katoh, Toru, 2020, Taxonomy and evolution of asymmetric male genitalia in the subgenus Ashima Chen (Diptera: Drosophilidae: Phortica Schiner), with descriptions of seven new species, Zootaxa 4789 (1), pp. 1-54 : 30

29) Phortica (Ashima) kerinciensis Toda , sp. nov.

( Fig. 8 )

Diagnosis. Surstylus without peg-like teeth (ch.37-1); aedeagal sheath with 1 posterior and 2 anterior postgonites all strongly sclerotized, recurved, long and thick ( Fig. 8 I–K).

Description (not repeating characters common to P. nigrifoliiseta ). Supracervical setae 25–27. Dorsomedial, tentorial apodeme slightly longer than 1/2 basal, parallel portion of dorsolateral, tentorial apodeme. Arista with arb = 1–3/0. Cibarial, medial sensilla approximately 10 per side; posterior sensilla approximately 7 per side. All tarsomere Is slightly longer than rest tarsomeres together. One anterior postgonite deeply bifurcated, but the other with triangular flap submedially ( Fig. 8 I–K).

Measurements (holotype /range of 6♂ paratypes, in mm): BL = 4.13/3.94–4.32, ThL = 2.07/1.92–2.14, WL = 3.31/3.11–3.47, WW = 1.39/1.34–1.45.

Indices (holotype /range of 6♂ paratypes, in ratio): FW/HW = 0.44/0.44–0.47, ch/o = 0.12/0.10–0.11, prorb = 1.24/1.05–1.28, rcorb = 0.52/0.48–0.60, vb = 0.55/0.36–0.67, dcl = 0.51/0.51–0.62, presctl = 0.66/0.60–0.76, sctl = 0.99/0.92–1.09, sterno = 1.00/0.92–0.99, orbito = 2.04/1.56–1.90, dcp = 0.26/0.25–0.31, sctlp = 1.12/1.03–1.29, C = 2.78/2.25–2.71, 4c = 1.21/1.31–1.48, 4v = 2.75/2.69–3.33, 5x = 0.91/0.90–1.13, ac = 3.00/3.00–3.45, M = 0.54/0.59–0.69, C3F = 0.71/0.66–0.76.

The antisymmetry is observed in the postgonites: in A-type, the posterior postgonite and the bifurcated, anterior one are present on the right side, but only the other anterior postgonite on the left side; but in B-type, vice versa ( Fig. 8J ).

Holotype. ♂ (B-type; MZB), “ Mt. Kerinci , Jambi, Indonesia, 1°45’5.9”S 101°15’34.6”E, 1800–2000 m a.s.l., 6.x.2004, M.J. Toda ”.

Paratypes. Indonesia: 1♂ (A-type) 5♂ (B-type), same data as the holotype (3♂ MZB, 3♂ SEHU) .

Distribution. Sumatra (Jambi).

Etymology. Referring to the type locality.

Figures

FIGURE 8. Phortica (Ashima) kerinciensis Toda, sp. nov. (♂ paratype). A, Antenna; B, posterior portion of scutum (dorsal view); C, medial and posterior sensilla on cibarium (dorsal view); D, fore tarsus; E, abdominal sternites; F, habitus (ventral view); G, periphallic organs (caudolateral view); H, aedeagus and postgonites; I–K, phallic organs (lateral, ventral and ventrolateral views, respectively; B-type). Scale bars: 0.1 mm in A, C, D, G–K; 0.5 mm in B, E, F.