Bythograeidae, Williams, 1980

GUINOT, DANIÈLE, TAVARES, MARCOS & CASTRO, PETER, 2013, Significance of the sexual openings and supplementary structures on the phylogeny of brachyuran crabs (Crustacea, Decapoda, Brachyura), with new nomina for higher-ranked podotreme taxa, Zootaxa 3665 (1), pp. 1-414 : 97

Family Bythograeidae

The male gonopore is coxal, being located on the anterior margin of the coxo-sternal condyle in Bythograea Williams, 1980 ( Fig. 8H ), Cyanagraea de Saint Laurent, 1984, and Segonzacia Guinot, 1989 , but partially on the coxa itself ( Austinograea ). The penis is short.

Figures

FIGURE 8. Coxal gonopore in heterotreme families, including families with coxo-sternal condition (D, G, I–K). A, Corystes cassivelaunus (Pennant, 1777) (Corystidae), male 33.0 × 26.0 mm, Bay of Biscay, (MNHN-B27912); B, Thia scutellata (Fabricius, 1793) (Thiidae Thiinae), male 17.7 × 19.0 mm, Mediterranean Sea (MNHN-B416); C, Xantho hydrophilus (Herbst, 1790) (Xanthidae Xanthinae), male 20.5 × 33.0 mm, France, Concarneau; D, Goneplax rhomboides (Linnaeus, 1758) (Goneplacidae Goneplacinae), male 12.0 × 21.0 mm, Tunisia (MNHN-B10159); E, Pilumnus hirtellus (Linnaeus, 1761) (Pilumnidae Pilumninae), male, Mediterranean Sea (MNHN); F, Menippe mercenaria (Say, 1818) (Menippidae), male, Florida (MNHN-B9500); G, Ommatocarcinus macgillivrayi White, 1851 (Goneplacidae Goneplacinae), male 27.7 × 73.6, Australia, New South Wales (MNHN-B10216); H, Bythograea thermydron Williams, 1980 (Bythograeidae), male 33.0 × 60.0 mm, paratype, Galapagos Rift (MNHN-B6468); I, Rhizopa gracilipes Stimpson, 1858 (Pilumnoidea Rhizopidae), male 6.3 × 8.8 mm, Thailand (MNHN-B24500); J, Malacoplax californiensis (Lockington, 1877) (Panopeidae), male 10.0 × 14.0 mm, Gulf of California (MNHN-B10212); K, Prionoplax spinicarpus H. Milne Edwards, 1852 (Panopeidae), male 14.8 × 22.2 mm, holotype, [? China: erroneous origin] (MNHN-B10347). In E, F, penis emerging from P5 coxo-sternal condyle. a1, a3, abdominal somites 1, 3; c, coxo-sternal condyle; cx5, P5 coxa; e7, episternite 7; g, gonopore; m.l., median line; p, penis; 7, 8, thoracic sternites 7, 8; 6/7, 7/8, thoracic sternal sutures 6/7, 7/8.