GENUS Manayunkia Leidy, 1859

Manayunkia Leidy, 1859: 90 .— Rouse, 1996: 1771 –772.

Haplobranchus Bourne, 1883: 176 .— Hartman, 1959: 549. Dybowscella Nusbaum, 1901: 6 .— Hartman, 1959: 549.

Garjaiewella Dybowsky, 1929: 485 .— Hartman, 1959: 549.

Manayunkia aestuarina (Bourne, 1883)

Haplobranchus aestuarinus Bourne, 1883: 176 .

Manayunkia aestuarina .— McIntosh, 1923: 305 –307.— Bishop, 1984: 389 –390. Type locality: England, Sheppey Island; Ireland, Mouth of the Liffey. Type material: BMNH?

Records: Species broadly distributed in European waters and in the North American coasts: Bell (1982: 215–220) recorded it from South Carolina; Bishop (1984: 389–390) from the Gulf of Mexico, and Rouse (1995: 249) from Chesapeake Bay (Maryland).

Manayunkia speciosa Leidy, 1859

Manayunkia speciosa Leidy, 1859: 90 .— Pettibone, 1953: 149 –153, Fig. 1. Type locality: Philadelphia, Schuylkill River. Type material: ANSP.

Records: Gulf of Mexico (Brehm 1978).