Prionospio (Minuspio) multibranchiata Berkeley, 1927: 414, plate 1, fig. 1.— Mackie, 1984: 40 –45, fig. 3.— Maciolek, 1985: 365 –367: fig. 15.— Granados-Barba & Solís-Weiss, 1998: 115.
Type locality. Vancouver Island, British Columbia, Canada, intertidal. Type material. lost.
Records. Mexico: Campeche, Yucatan (Granados-Barba & Solís-Weiss 1998). Ascensión Bay, Quintana Roo, Mexico (29 ° 20´N, 84 ° 44´W), 30 m. USA: Hutchinson Island, Florida (27 º 20.4´N, 80 º 13.1´W), 9.7 m (Maciolek 1985).
Remarks. This species has a confused diagnosis and subjet to different interpretations. Foster (1971) placed it in synonymy with M. cirrifera. Mackie's figured material somewhat resembles M. lighti Maciolek (1985), but differs in that they have dorsal crests and a different prostomial shape. The best description of M. multibranchiata available is that of Maciolek (1985). She included material from Washington State, south of Nanaimo (type locality) in her description. The only question is whether her west and east coast USA material is conspecific. The record of this species for the Grand Caribbean is questionable. These records should be confirmed or described as new species.