Seguenzia Jeffreys, 1876,

Geiger, Daniel L., 2019, The Family Seguenziidae Verrill, 1884 in the Northeast Pacific, including a comment on excessive numbers of taxonomic data portals, Zoosymposia 13, pp. 61-69: 64

publication ID

http://dx.doi.org/10.11646/zoosymposia.13.1.7

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:16D27C71-5A6C-4ADF-AD6C-6B07C2773112

persistent identifier

http://treatment.plazi.org/id/D557D228-F438-FFBA-D58F-FCA3FB59F82D

treatment provided by

Plazi

scientific name

Seguenzia Jeffreys, 1876
status

 

Seguenzia Jeffreys, 1876 

( Figure 2View FIGURE 2)

Seguenzia Jeffreys, 1876: 200  . Type species (M): S. formosa Jeffreys, 1876  . Northwest Atlantic.

Description. Shell to 10 mm, thin, fragile, umbilicate or anomphalous, external and internal surfaces with nacreous luster. Apertural lip bordering three labral sinuses often flaring in mature shells. Columella curved, ending abruptly. Sculpture of narrow spiral carinae, basal cords; fine spiral threads, sharp axial riblets curving parallel to labral sinuses.

Remarks. Species occur throughout the world on the lower continental slope and abyssal plain. Seguenzia occidentalis Dall, 1908  (see Keen 1971) is known from the Panamic Province. There are two groups of Seguenzia  , 1) specimens with globular shells and with less prominent spiral keels: S. cervola  , S. macleani  , and 2) biconical shells with more prominent spiral keels: S. giovia  , S. stephanica  .

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Family

Seguenziidae

Loc

Seguenzia Jeffreys, 1876

Geiger, Daniel L. 2019
2019
Loc

Seguenzia

Jeffreys, J. G. 1876: 200
1876