The Family Seguenziidae Verrill, 1884 in the Northeast Pacific, including a comment on excessive numbers of taxonomic data portals Author Geiger, Daniel L. text Zoosymposia 2019 2019-02-19 13 61 69 journal article http://dx.doi.org/10.11646/zoosymposia.13.1.7 c6aa05ac-8e39-4b3f-bfe1-b0e6b1a7ecf9 1178-9905 3558484 urn:lsid:zoobank.org:pub:16D27C71-5A6C-4ADF-AD6C-6B07C2773112 Seguenzia cervola Dall, 1919 ( Figure 2 A–B) Seguenzia cervola Dall, 1919: 344 . Holotype USNM 209229 . Off North Coronado Island , Baja California , 618–692 fms [= 1130–1265 m ]. Seguenzia megaloconcha Rokop, 1972: 15 , fig. 1. Holotype USNM 701260 . SW of Farallon Islands , W of Pioneer Seamount , 3592–3798 m . New synonym. Description. Shell to 10 mm , globular inflated, suture little impressed; spiral cords decreasing in strength from shoulder to base, one below suture, one on mid-shoulder, more than one dozen from periphery to base; crossed by finest axial lines; umbilicus open, bordered by more or less distinct periumbilical cord, partially covered by umbilical chink, funiculus present; columellar wall thickened, abruptly ending. Distribution. Oregon (46˚N) to Coronado Islands, Baja Califonia (32˚N). 1100–3800 m . Remarks. Seguenzia megaloconcha is a small specimen of S. cervola as shown by the identical sculpture on the earlier portion of the teleoconch and the shared umbilical characters.