Drosophila freidbergi, Grimaldi & Jones, 2020

Grimaldi, David A. & Jones, Lance E., 2020, A Revision of the Drosophila spinipes Species Group (Diptera: Drosophilidae), Zootaxa 4809 (1), pp. 1-28 : 13-14

Drosophila freidbergi , new species

Figs. 3A , 9B , 10F , 11B , 12H

LSID urn:lsid:zoobank.org:act:153B7D88-8B95-4353-AA35-3ACCBC006392

Diagnosis: Anterior reclinate small (OR2/OR1 0.73, vs.>.08–0.93); apex of male abdomen dark (including epandrium); distiphallus width in dorsoventral view at least twice that of phallus stem, large and thick in lateral view, with fine medial spicules, no medial scales; lateral margin of aedeagus not serrate, tip papillate.

Description: Coloration typical of group, katepisternum and meron very slightly infuscate and pollinose; tergite 6 lighter than preceding segments, epandrium and cerci darker. Setation as in diagnosis and measurements. Protarsal spines with typical array of 8 fang-shaped spines alternating in size, 4 on each on two basal tarsomeres. Male genitalia: Hypandrium with narrowed anterior end, width 0.5x the posterior end; phallus in dorsoventral view gradually broadened subapically to at least twice the width of phallus shaft. Like cameroonensis , without coarse or fine scales, only minute pimpules apically, short, dense spicules medially; aedeagus best distinguished from cameroonensis in lateral view, freidbergi being larger and much thicker ( Fig. 12h , cf. fig. 12e). Female unknown. Measurements:

Head: HD/HW 0.77; FL/LFW 0.89; VB2/VB1 0.64; EW/ED 0.67; OR2/OR1 0.73; OR3/OR1 1.06; OC/POC 1.50; FW/FD 0.68; ODB/ODA 0.40. Thorax: ThL 0.99 mm.; UPS/LHS 0.82; LHS/ThL 0.23; ADC/PDC 0.46; AKE/PKE 0.63; LF1/LF2 0.84.

Holotype: Male , HS-06, “ Cameroon: 20 Km S. Bamenda, 1800 m, 22.XI.1987, A. Freidberg. ” Minuten doublemounted, genitalia dissected by DG; in TAU.

Other Specimens: Known only from the holotype.

Etymology: Patronym for the dipterist Amnon Freidberg, Tel Aviv University, collector of the holotype and many other specimens used in this study.

Figures

FIGURE 3. Lateral and dorsal habitus of several Drosophila spinipes-group species. A. D. freidbergi n. sp. (HS-06). B. D. malagasy n. sp. (HS-18). C. D. nigrospinipes n. sp. (HS-24). D. D. phalloserra n. sp. (HS-08). E. Dorsal thorax, sp. C (HS-13). F. D. spinipes Lamb (NHMUK 014335955), dorsum. G. D. spinipes Lamb (NHMUK 014335956), lateral.

FIGURE 9. Hypandrium with aedeagus of five species in the Drosophila spinipes group. A. D. cameroonensis n. sp. (HS-10). B. D. freidbergi n. sp. (HS-06). C. D. hypandrilata n. sp. (HS-38). D. D. malagasy n. sp. (HS-16), with subepandrial sclerite. E. D. malagasy n. sp. (HS-17), with subepandrial sclerite. F. D. nigrospinipes n. sp. (HS-24).

FIGURE 10. Continued from Fig. 9, hypandrium with aedeagus of two species in the Drosophila spinipes group, ventral views. A-C: D. phalloserra n. sp. (HS-07, HS-08, DMSA 140413, respectively). D. sp. D (HS-03). E-K: subepandrial sclerites, all to the same scale. E. D. cameroonensis n. sp. (HS-10). F. D. freidbergi n. sp. (HS-06). G. D. malagasy n. sp. (HS-20). H. D. nigrospinipes n. sp. (HS-24). I. D. phalloserra n. sp. (DMSA 140413). J. D. suma Burla (HS-01). K. sp. D (HS-03). A-D: to same scale as ones in fig. 9.

FIGURE 11. Distiphallus of most species in the Drosophila spinipes group, ventral view, all to the same scale. A. D. cameroonensis n. sp. (HS-10). B. D. freidbergi n. sp. (HS- 06). C. D. hypandrilata n. sp. (HS-38). D. D. malagasy n. sp. (HS- 20). E. D. malagasy n. sp. (HS- 16). F. D. nigrospinipes n. sp. (HS- 24). G. D. phalloserra n. sp. (HS-08). H. D. phalloserra n. sp. (HS- 07). I. D. phalloserra n. sp. (DMSA 140413). J. D. suma Burla (HS-01). K. sp. D (HS-03).

FIGURE 12. Aedeagus, aedeagal apodeme, and postgonite for most species in the Drosophila spinipes group, lateral views, all to the same scale. Spicules on the phallus are on the inner (mesal) surface. A. D. suma Burla (HS-01). B. D. malagasy n. sp. (HS- 17). C. D. malagasy n. sp. (HS-20). D. D. malagasy n. sp. (HS-22). E. D. cameroonensis n. sp. (HS- 10). F. D. hypandrilata n. sp. (HS- 38). G. sp. D (HS- 03). H. D. freidbergi n. sp. (HS- 06). I. D. nigrospinipes n. sp. (HS-24). J. D. phalloserra n. sp. (HS-07). K. D. phalloserra n. sp. (HS-08). L. D. phalloserra n. sp. (DMSA 140413).