Syrphus conjunctus, Wiedemann, 1830

Mengual, Ximo, Miranda, Gil Felipe G. & Thompson, F. Christian, 2018, Unraveling Ocyptamus and the Baccha legacy (Diptera: Syrphidae): redefinition of groups and new species descriptions, Zootaxa 4461 (1), pp. 1-44 : 19

conjunctus Wiedemann, 1830 [incertae sedis]

Figs 27 , 44 .

Syrphus conjunctus Wiedemann, 1830: 116 . Type-locality: South America [HT ♂ ZMUC].

Baccha atypica Curran, 1930a: 10 . Type-locality: Brazil, Mato Grosso, Chapada [HT ♀ AMNH]. New synonym.

Therantha atypica . Hull (1943b: 47).

Ocyptamus atypicus . Thompson et al. (1976: 13).

Ocyptamus conjunctus . Thompson et al. (1976: 15).

Comments. This species does not fit the current definition of Ocyptamus . Preliminary morphological analyses place it close to Mimocalla species, but not all characters are in agreement with that taxon. Hull (1943b) erected the subgenus Therantha for the species Baccha atypica Curran, 1930a , a junior synonym of conjunctus Wiedemann , based on the elongate antenna, with each segment (scape, pedicel and basoflagellomere) subequal. Although there is an available generic name for this species, it is possible that it might still be allocated to one of the other taxa presented above in future analyses. Thus, it is left incertae sedis until more analyses can ascertain its position in the classification.

Figures

FIGURES 20–31. 20: Toxomerus dispar (Fabricius) [female, INPA-DIP0000142], head, lateral view. 21: Toxomerus basalis (Walker) [male, ZFMK-DIP-00012165], head, frontal view. 22: Toxomerus paragrammus (Schiner) [male syntype, NHMW], head, lateral view. 23: Toxomerus marginatus (Say) [male, USNM], habitus, dorsal view. 24: Toxomerus pallipes (Bigot) [male, ZFMK], habitus, dorsal view. 25: Toxomerus dispar, epandrium and associated structures, dorsal view (from Thompson 1981). 26: Toxomerus floralis (Fabricius), epandrium and associated structures, dorsal view (from Thompson 1981). 27: Syrphus conjunctus Wiedemann [male, CNC_Diptera209347], head, lateral view. 28: Ocyptamus maximus Thompson sp. nov. [male paratype, INB003306083], head, dorsal view. Scale = 1 mm. 29: Ocyptamus sp., O. lepidus species group, female, habitus, dorsal view, by Gil F. G. Miranda. 30: Ocyptamus sp., O. callidus species group [female, INPA-DIP0000171], habitus, dorsal view. Scale = 2 mm. 31: Ocyptamus aff. micropyga, O. lepidus species group [male, INPA-DIP0000267], epandrium and associated structures, ventral view.

FIGURES 38–45. 38: Syrphus sargoides Macquart [male, DZUP-Diptera 342599], habitus, dorsal view. 39: Syrphus sargoides [female, GFGM-MNRJ0003], metafemur and metatibia, lateral view. Scale = 1 mm. 40: Baccha grata Curran [male, USNMENT 00022542], habitus, lateral view. Scale = 2 mm. Note: framed with white, a zoom-in of the antennae. 41: Baccha grata [male, USNM], male, habitus, lateral view. 42: Baccha grata [male, USNM], male, habitus, dorsal view. 43: Baccha grata [female, USNMENT 00022543], spermatheca. Scale = 100 µm. 44: Syrphus conjunctus, female, by Steve Marshall. 45: Ocyptamus dimidiatus (Fabricius) [female, INPA-DIP0000808], antenna. Scale = 0.2 mm. Note: Arrow indicates the narrow pedicel projection over the basoflagellomere.