Craspedochaeta transversa, Czerny, 1903

Lonsdale, Owen & Marshall, Stephen A., 2006, Revision of the New World species of Craspedochaeta (Diptera: Clusiidae), Zootaxa 1291 (1), pp. 1-101 : 18

Craspedochaeta transversa species group

The Craspedochaeta transversa species group is most easily recognized on the basis of an additional pair of reclinate fronto­orbital bristles at the anterior margin of the frons ( Fig. 8 ). Other synapomorphies (found in most or all species) include lighter bristles and paler notal colouration, united cerci that are often large and plate­like ( Fig. 52 ), an elongate basiphallus ( Fig. 59 ), atrophy of the distiphallus and the ejaculatory apodeme ( Fig. 59 ) and a long subterminal flagellum on the female ventral receptacle ( Figs. 67–77 ).

The order of species descriptions reflects the order in which the species appear on the cladogram ( Fig. 116 ).

Figures

FIGURE 116. Phylogenetic hypothesis for the New World Craspedochaeta, using a hypothetical ancestor as an outgroup (removed from final figure). Selected from one of the 48 equally parsimonious trees calculated by PAUP (Phylogenetic Analysis Using Parsimony (Swofford, 2003)) from the matrix in table 2, using a simple heuristic search with all characters unweighted (length=74 steps, CI=0.48, RI=0.83), and using the command “condense collapse=minbrlen”. Solid circles indicate unique characters and open circles are homoplasies or character reversals.

FIGURES 7–9: heads; outline drawing, left lateral (arista and bristles removed, excluding vibrissa and fronto­orbital bristles); 7: Craspedochaeta concinna (Williston, 1896) (C. concinna species group); 8: C. pleuralis (Williston, 1896) (C. transversa species group); 9: C. argoniae spec. nov. (C. biseta species group).

FIGURES 47–52: male terminalia, external: Figs. 47–48: Craspedochaeta pollostos spec. nov.; Fig. 47: left lateral; Fig. 48: posterior; Figs. 49–50: C. chela spec. nov.; Fig. 49: left lateral; Fig. 50: posterior; Figs. 51–52: C. weemsi spec. nov.; Fig. 51: left lateral; Fig. 52: posterior.

FIGURES 59–60: Labeled hypandrial complex of Craspedochaeta synneura (Hennig, 1938); Fig. 59: left lateral; Fig. 60: anterior.

FIGURES 67–70: Internal female genitalia; Figs. 67: Craspedochaeta pleuralis (Williston, 1896); Figs. 68: C. pollostos spec. nov.; Figs. 69: C. weemsi spec. nov.; Figs. 70: C. synneura (Hennig, 1938).

FIGURES 71–77: Female internal genitalia (double line indicates the removal of an elongate median section to facilitate illustration); Fig. 71: Craspedochaeta feminea spec. nov.; Fig. 72: C. claripennis (Melander & Argo, 1924); Fig. 73: C. ornata Hennig, 1938; Fig. 74: C. transversa Czerny, 1903; Fig. 75: C. protomis spec. nov.; Fig. 76: C. nigrithorax (Hennig, 1938); Fig. 77: C. apsilutea spec. nov.