Drosophila (Sophophora) parabicornuta Katoh & Watada, 2025
|
publication ID |
https://doi.org/10.11646/zootaxa.5661.4.8 |
|
publication LSID |
lsid:zoobank.org:pub:79E4289A-A7E8-407A-B5C7-B6FD5321E8E2 |
|
persistent identifier |
https://treatment.plazi.org/id/039387D2-FF87-B07A-21EA-FD2C2A1777D2 |
|
treatment provided by |
Plazi |
|
scientific name |
Drosophila (Sophophora) parabicornuta Katoh & Watada |
| status |
sp. nov. |
Drosophila (Sophophora) parabicornuta Katoh & Watada , sp. nov.
( Figs 2A View FIGURE 2 , 3A View FIGURE 3 , 4 View FIGURE 4 )
Diagnosis: Median gonocoxite strongly protruded, apically truncated, with a pair of fine spines ( Fig. 2A View FIGURE 2 ).Abdominal tergites VI and VII of female entirely yellowish brown ( Fig. 3A View FIGURE 3 ).
Description (♂, ♀). Head: Eye red, with interfacetal setulae. Frons pale brown. Fronto-orbital plate pale brown. Frontal triangle brown. Facial carina brown, high, narrow. Clypeus grayish brown. Gena pale brown. Palpus grayish brown, with terminal prominent seta. Prementum and postgena pale brown. Occiput brown, marginally darker. Antennal pedicel brown; first flagellomere grayish yellow; arista with 4–5 dorsal and 2–3 ventral branches and moderate terminal bifurcation.
Thorax: Scutum and scutellum yellowish brown. Acrostichal setulae in 6 irregular rows. Postpronotal lobe yellowish brown, with 2 setae. Anepisternum and anepimeron brown. Katepisternum yellowish brown.
Wing hyaline. Veins brown. C 1 setae 2. R 2+3 straight; R 4+5 and M 1 nearly parallel. Halter pale brown.
Legs yellowish brown. Preapical dorsal setae present on tibiae of all legs, weak on fore- and hind-legs; apical ventral setae on fore- and mid-tibiae. Male fore-leg with 2 longitudinal sex combs on tarsomeres I and II; sex comb teeth 23 (range: 21–23) on tarsomere I, 16 (15–17) on tarsomere II. Fore-leg tarsomere I twice length of tarsomere II, and tarsomere II half of rest together; tarsomere Is of mid- and hind-legs as long as rest together.
Abdomen: Tergites yellowish brown, each with medially not interrupted caudal dark brown band, sometimes narrow in female. Sternites pale brown.
Male terminalia ( Figs 2A View FIGURE 2 , 4A–D View FIGURE 4 ): Epandrium yellow, with 3–4 setae on dorsal to lateral part; ventral lobe with 9–13 setae. Surstylus brown, conical, fused to epandrium, with 6 short peg-like teeth in row near caudal margin, and cluster of 5–7 short and 1 long, dorsally curved setae on ventral margin. Cercus brown, separated from epandrium, not pubescent; upper portion somewhat triangular, with 11–13 setae on lateral surface, with 1 large, black, stout spine on margin to ventral robe; ventral robe conical, bearing 3 large, black, stout, ventrally curved spines on posterior margin and 4–6 setae on anterior margin. Subepandrial sclerite dark brown, X-shaped. Hypandrium brown, longer than wide, pubescent near caudal margin of gonocoxites; median gonocoxite strongly protruded, apically truncated, with a pair of spine. Pregonite brown, hemispherical, with 2–3 sensilla. Postgonal sheaths as long as aedeagus, distally less sclerotized and finely serrated on margin, not fused to each other. Postgonite apically fused to postgonal sheath. Aedeagus long, nearly straight, apically somewhat pointed, subapically broadened in ventral view, finely but densely hirsute from ventrosubapical portion to apical margins surrounding gonopore, basally fused to phallapodeme; phallapodeme as long as aedeagus, basally broadened and rounded in lateral view. Ejaculatory apodeme with somewhat square plate protruded at each corner; stem of apodeme nearly straight.
Female terminalia ( Fig. 4E View FIGURE 4 ): Hypogynium dark orange brown, subapically broadened, apically rounded, with 13– 16 marginal peg-like teeth and 1 trichoid sensillum subapically. Spermathecal capsule atrophied, less sclerotized.
Measurements: BL (straight distance from anterior edge of pedicel to tip of abdomen) = 2.12 mm in holotype (paratypes: 1.96–2.24 in 10 ♂, 2.24–2.56 in 10 ♀); ThL (distance from anterior notal margin to apex of scutellum) = 0.93 mm (0.86–1.00 in ♂, 0.94–1.04 in ♀); WL (distance from humeral cross vein to wing apex) = 1.71 mm (1.58–1.74 in ♂, 1.80–1.93 in ♀); WW (maximum wing width) = 0.86 mm (0.80–0.88 in ♂, 0.86–0.96 in ♀).
Indices: frontal width/head width (FW/HW) = 0.43 (0.37–0.44), maximum width of gena/maximum diameter of eye (ch/o) = 0.08 (0.07–0.11), proclinate orbital/posterior reclinate orbital in length (prorb) = 0.93 (0.80–0.97), anterior reclinate orbital/posterior reclinate orbital in length (rcorb) = 0.40 (0.36–0.57), subvibrissa/vibrissa in length (vb) = 0.83 (0.73–0.86), anterior dorsocentral/posterior dorsocentral in length (dcl) = 0.63 (0.57–0.69), basal scutellar/apical scutellar in length (sctl) = 0.86 (0.81–0.93), anterior katepisternal/posterior katepisternal in length (sterno) = 0.63 (0.53–0.73), mid katepisternal/posterior katepisternal in length (sterno2) = 0.26 (0.23–0.32), distance between proclinate and posterior reclinate orbitals/distance between inner vertical and posterior reclinate orbital (orbito) = 0.63 (0.53–0.70), length distance between ipsilateral dorsocentrals/cross distance between anterior dorsocentrals (dcp) = 0.48 (0.42–0.54), distance between ipsilateral scutellars/cross distance between apical scutellars (sctlp) = 1.15 (1.00–1.36), a/b (where a = 2nd costal section between subcostal break and R 2+3; b = 3rd costal section between R 2+3 and R 4+5) (C) = 1.96 (1.77–2.23), b/d (where d = M 1 between r-m and dm-m) (4c) = 1.59 (1.40–1.73), c/d (where c = M 1 between dm-m and wing margin) (4v) = 2.71 (2.38–2.93), e/f (where e = M 4 between dm-m and wing margin; f = dm-m between M 1 and M 4) (5x) = 2.25 (1.88–2.83), b/h (where h = distance between distal ends of R 4+5 and M 1) (ac) = 3.00 (2.50–3.38), e/d (M) = 1.06 (0.88–1.17), g/b (where g = length of heavy setation on 3rd costal section) (C3F) = 0.59 (0.54–0.63).
Holotype: ♂, from iso-female line (14028-0511.00) originated from a wild-caught female collected in Ken- Ting , Taiwan, 6.i.1968 ( NTUM).
Paratypes: 9 ♂ and 10 ♀, same data as holotype ( NTUM, SEHU) .
Etymology: Morphological resemblance to D. bicornuta .
Distribution: Taiwan.
Relationships: This species clearly belongs to the montium species group in light of their morphological characteristics such as the sex-combs of longitudinal rows along entire length of tarsomeres I and II of male fore-leg and male genital structures, and according to Yassin’s (2018) classification, is assigned to the birchii species complex of the serrata species subgroup. This species is very closely related to D. bicornuta , but can be distinguished from it by having the shorter and weaker apical spines on the median gonocoxite process ( Fig. 2A, B View FIGURE 2 ), entirely yellowish abdominal tergites VI and VII in female (black in D. bicornuta ; Fig. 3A, B View FIGURE 3 ). Combinations of some quantitative characters can be used to discriminate this species from D. bicornuta ( Table 2).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.