Cooka melanderi (Cook)

Amorim, Dalton de Souza & Brown, Brian V., 2020, Urban Scatopsidae (Diptera) of Los Angeles, California, United States, Insect Systematics and Diversity 4 (1), No. 1, pp. 1-41 : 38

Cooka melanderi (Cook)

( Figs. 14 and 27 )

Cooka melanderi (Cook), 1975: 74 , Figs. 18 (♂ terminalia), 30 (♀ terminalia) ( Rhexoza ). Type ♂, NMNH.

Ref.– Cook 1978 (redescription), Figs. 7 (♂ segment 7), 15 (♂ terminalia), 22 (♀ terminalia). Amorim 2007 (new combination).

Diagnosis. One single whorl of setae on flagellomeres 1–9. Large maxillary palpus, rounded distally. Sternites 1–4 unsclerotized. Pre-tergites 2 and 3 produced. Length of cell r5 about five times its width at base. Aedeagal plate present, flattened. Tergite 9 laterally compressed, distally rounded; gonostylus absent; sperm duct opening at the apex of a short basal extension of the aedeagal sclerite. Female sternite 8 well projected, with a deep posterior incision.

Material Examined. 2 ♂♂, United States, California, Los Angeles Co., Glendale , 34.149°N 118.218°W, BioSCAN site 13, Malaise trap, 245.4 m, Coll. Karen Hoffman, BioSCAN sample 16722 (LACM) .

Distribution. United States, southern California.

Remarks. The type locality of C. melanderi is Santa Ana, California, just southeast of Los Angeles. Only two males of this species have been collected, both in the same sample. The type series of C. melanderi had only two specimens, the male holotype and a female paratype. We have no photos of these specimens, but Cook’s (1975) original illustrations are good enough for the recognition of the species. There are no records for species of Cooka in the BOLDSystems website.

Figures

Figs. 11–14. Habitus. 11. Abrhexosa grossa (Cook), male. 12. Akorhexosa grossa (Cook), female. 13. 10. Abrhexosa ryckmani (Cook), male. 14. Cooka melanderi (Cook), male.

Figs. 25–27. Abdomen.25. Akorhexosa grossa (Cook), male. 26. Akorhexosa grossa (Cook), female. 27. Cooka melanderi (Cook), male.

Figs. 15–20. Abdomen. 15. Ectaetia betzi sp.nov, male holotype. 16. Psectrosciara gonzalezae sp.nov., female paratype. 17. Scatopse notata (Linnaeus), female. 18. Aztecatopse huertai sp.nov., female paratype. 19. Coboldia fuscipes (Meigen), male. 20. Coboldia fuscipes (Meigen), female (white arrow indicates the diagnostic lunulate sternite 7 posterior incision).

Figs. 7–10. Habitus. 7. Coboldia fuscipes (Meigen), male (black arrow indicates the diagnostic tergite 8 spatulate projection). 8. Coboldia fuscipes (Meigen), female. 9. Quateiella quatei (Cook), male. 10. Quateiella quatei (Cook), female.