| Collum | Anterior margin not modified (Fig. 21A) | Anterior margin strongly expanded laterad, forming trough for accommodation of antenna (Fig. 24A–B) |
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| First pair of legs | Coxosternum with a few lateral setae (cxs). Prefemoral lobes without setae (Fig. 22B–D) | Coxosternum with a large field of numerous setae (cxs). Prefemoral lobes densely clad with setae (Fig. 24C– E, Krabbe 1982: fig. 179) |
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| Post-torsal gonopod telopodite | With a curved slender lobe detaching from margin ca. at midlength (Fig. 23C, E–F: ltp) | No such lobe (Fig. 24F–G) |
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| Tip of solenomerite | Simple (Fig. 23D–E, G) | With a multi-pronged differentiation (Fig. 24H–I) |
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