CLADOENDESIS OF EPHEMEROPTERA
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Figure 103. Leptohyphes/fg1-Tricorythodes/fg1, larva.

A–B – minutus [Tricorythodes]: A – right margin of abdominal segments II-VII with right tergalii, ventro-lateral view, tergalii not pressed to the body (compare with Fig.101:D); B – transverse section on level of end of abdominal segment V, tergalii pressed to the body. C – cubensis [Tricorythodes], right tergalius III, dorsal view. D–F – sacculobranchis [Tricorythodes]: D – left tergalius II (gill operculum), ventral view; E – abdominal sternum IX and caudalii of male larva; F – the same of female larva. (D–F – from Kluge & Naranjo 1990).

Abbreviations: II:a – anal branch of ventral lobe of tergalius II; II:c – costal branch of ventral lobe of tergalius II; II:d – dorsal lobe of tergalius II (gill operculum); III:a – anal branch of ventral lobe of tergalius III; III:c – costal branch of ventral lobe of tergalius III; III:d – dorsal lobe of tergalius III; IV:a – anal branch of ventral lobe of tergalius IV; IV:c – costal branch of ventral lobe of tergalius IV; IV:d – dorsal lobe of tergalius IV; a.r – anal rib; c.r – costal rib; v.r – additional rib on costal branch of ventral lobe