Trichogenia (Braasch and Soldan, 1988)

Webb, J. M., Braasch, D. & Mccaferty, W. P., 2006, Reevaluation of the Genera Compsoneuria Eaton and Trichogenia Braasch & Soldán (Ephemeroptera: Heptageniidae), Zootaxa 1335, pp. 55-68 : 66

Key to the Species of Trichogenia larvae

1 Gill lamellae 2–7 long, narrow and sharply pointed; base of outer canines of mandibles without dense lateral brush of setae; supracoxal sclerites short; distribution Thailand, Vietnam..................................................................................................... T. maxillaris

- Gill lamellae 5–7 rounded with pointed apex; base of outer canines of mandibles with dense lateral brush of setae; supracoxal sclerites long and pointed; distribution Indonesia................................................................................................................................ 2

2 Anterior surface of femora with setae all of approximately same size and shape ( Fig. 9 ); abdominal terga with numerous, many-branched robust setae ( Fig. 10 ); distribution Celebes ............................................................................................................ T. hubleyi

- Anterior surface of femora with some robust setae distinctly larger than others ( Fig. 13 ); abdominal terga with few branched robust setae, generally found only near posterior margins; distribution Sumatra, Borneo ..................................................... T. ulmeri

Figures

FIGURE 6 – 10. Trichogenia hubleyi. 6, maxilla: ventral; 7, labial palp: dorsal view of terminal segment; 8, supracoxal sclerites (indicated by arrows); 9, hindfemur: setae on middle section of anterior face; 10, tergum V: setae.

FIGURE 11 – 13. 11 – 12, T. maxillaris, 11, hypopharynx: a. dorsal b. ventral; 12, labial palp: dorsal view of terminal segment. 13, T. ulmeri, hind femur: setae on middle section of anterior face.