Drosophila cameroonensis, 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 : 11-13

Drosophila cameroonensis , new species

Figs. 6C , 7A , 9A , 10E , 11A , 12E

LSID urn:lsid:zoobank.org:act:397FFFD3-EC60-4475-B7A3-079362DCD98B

Diagnosis: Anterior reclinate slightly larger than proclinate (OR2/OR1 1.12); lowermost postpronotal seta very long (LHS/ThL 0.28, vs. 0.18–0.24); anterior dorsocentral seta about 1/3 the size of posterior dc (vs. approximately half); anterior katepisternal seta relatively large (AKE/PKE 0.70, vs. 0.4–0.6). Aedeagus like D. suma only longer (2.6x length of aedeagal apodeme, vs. 1.8x).

Description: Coloration typical of group, apical segments of abdomen light. Protarsal spines with typical array of 8 spines alternating in size, 4 on tarsomere 1, 4 on tarsomere 2. Setation as given in diagnosis above. Male genitalia: Hypandrium with anterior end narrowed to ~0.5x the posterior width; length of aedeagus + aedeagal apodeme equal to length of hypandrium. Apex of aedeagus hardly expanded in width, with only fine, short spicules and pimpules medially, no large scales, apex with very faint, fine serrations, not well defined. Subepandrial sclerite with anterior portion expanded, posterior portion with lateral arms that articulate with surstyli. Oviscapt narrowed apically, not broadly rounded; pegs in dorsal triad and ventral pair approximately equal in size; apical notch quite shallow; ventral series of 10 small, crowded pegs. Measurements: Head: HD/HW 0.81; FL/LFW 1.20; VB2/VB1 0.61; EW/ED 0.72; OR2/OR1 1.12; OR3/OR1 1.06; OC/POC 1.90; FW/FD 0.57; ODB/ODA 0.35. Thorax: ThL 0.93 mm.; UPS/LHS 0.84; LHS/ThL 0.28; ADC/PDC 0.36; AKE/PKE 0.70; LF1/LF2 0.80.

Holotype: Male, HS10, “ Cameroon, Rt. N11, Bafut, 20 km N. Bamenda, 17,24. XI.1987, Fini Kaplan”. Minuten double-mounted, genitalia dissected by DG, in TAU.

Other Specimens: Paratype, Female HS-09, “ Cameroon: Rt. N9, 20 km E Sangmelima 7.XI.1987, A. Freidberg. ” Minute double-mounted, genitalia dissected by DG, in TAU .

Etymology: In reference to the country where the species is currently known.

Figures

FIGURE 6. Female reproductive structures. A-D: ventral receptacles, probably various views. All to the same scale. A. sp. A (HS-04). B. sp. B (HS-05). C. D. cameroonensis n. sp. (HS-09). D. D. malagasy n. sp. (HS-19). E. Posterior 4 segments, lateral view of gravid female of D. malagasy n. sp. (HS-19), showing positions and sizes of ventral receptacle and egg.

FIGURE 7. Oviscapts, lateral view of right valves, with structures and peg groups used in the descriptions indicated in K. All to the same scale. A. D. cameroonensis n. sp. (HS-09). B. D. jambiya n. sp. (HS-39). C. D. malagasy n. sp. (HS-18). D. D. malagasy n. sp. (HS-28). E. D. phalloserra n. sp. (HS-11). F. D. phalloserra n. sp. (DMSA 140142). G. D. spinipes Lamb (NHMUK 014335956). H. D. suma Burla (HS-02). I. sp. A (HS-04). J. sp. B (HS-05). K. Species undetermined.

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).