MolluscaBase name details
Crassatellites (Scambula) berryi Spieker, 1922 †
1714851 (urn:lsid:marinespecies.org:taxname:1714851)
unaccepted > superseded combination
Species
marine, brackish, fresh, terrestrial
fossil only
Spieker, E. M. (1922). The paleontology of the Zorritos Formation of the north Peruvian oil fields. <em>The Johns Hopkins University, Studies in Geology.</em> 3: 1-197, pls. 1-10., available online at https://www.biodiversitylibrary.org/page/19066928
page(s): 131; pl. VII figs. 9, 10 [details]
page(s): 131; pl. VII figs. 9, 10 [details]
Original description Shell of medium size, anteriorly inflated, posteriorly attenuate. Anterior margin rounded; ventral margin rounded anteriorly,...
Original description Shell of medium size, anteriorly inflated, posteriorly attenuate. Anterior margin rounded; ventral margin rounded anteriorly, ascending posteriorly in a reflex curve to the apex of the first of two marginal angles. The posterior dorsal margin is about straight, descending to meet the apex of the second posterior marginal angle. Umbones high, erect, inflated, prosogyrate, proximate, the tops flattened,
with the flat surface sloping backward. Anterior surface convex. A prominent keel, sharp on and near the beaks and flattened ventrally, runs from the umbo to the
lower marginal angle; before the keel there is a sulcus, narrow and sharp umbonally and shallower ventrally. Behind the posterior half of the keel is a flat to concave surface which is often bounded posteriorly by a second vestigial keel. Sculpture of strong concentric undulations, their dorsal slopes steeper, sharp on the beaks and decreasing in prominence ventrally but evident over all of the shell, sharper anteriorly on the median surface. There is additional sculpture of fine growth-lines. The concentric sculpture parallels the margins. Lunule deeply impressed, distinct, oval : escutcheon of similar lines but more lanceolate. Hinge normal. Muscle scars deeply impressed; internal valve-margins smooth ; parallel line sharp. Length, 40.5 ; height. 28 ; diameter, 20.5 mm.
This form differs from Crassatellites nelsoni. chieflv in the possession of strong concentric undulations over most or all of its surface instead of on the beaks alone. This sculpture tends to become obsolete on the ventral-posterior part
of the shell, but it is clearly marked elsewhere on all specimens, and some show it almost equally strong over the entire shell. The beaks are not as prominently flattened as in nelsoni, and the valves are more highly inflated anteriorly, tapering off in greater contrast to a thin, produced posterior ring which is much narrower and longer than that of nelsoni.
No specimens as large as those of nelsoni in the Nelson collection have been found. C. bcrryi is very prolific in the Lower Zorritos formation. Crassatellites reevei Gabb, from Gatun, Santo Domingo, and Sapote, Costa Rica, is somewhat similar, and is perhaps the closest species known from the Americas. It differs chiefly in lacking the attenuate posterior wing of berryi. In addition the area behind the keel is flatter and smaller in berryi the beaks being higher and the keel more curved. [details]
with the flat surface sloping backward. Anterior surface convex. A prominent keel, sharp on and near the beaks and flattened ventrally, runs from the umbo to the
lower marginal angle; before the keel there is a sulcus, narrow and sharp umbonally and shallower ventrally. Behind the posterior half of the keel is a flat to concave surface which is often bounded posteriorly by a second vestigial keel. Sculpture of strong concentric undulations, their dorsal slopes steeper, sharp on the beaks and decreasing in prominence ventrally but evident over all of the shell, sharper anteriorly on the median surface. There is additional sculpture of fine growth-lines. The concentric sculpture parallels the margins. Lunule deeply impressed, distinct, oval : escutcheon of similar lines but more lanceolate. Hinge normal. Muscle scars deeply impressed; internal valve-margins smooth ; parallel line sharp. Length, 40.5 ; height. 28 ; diameter, 20.5 mm.
This form differs from Crassatellites nelsoni. chieflv in the possession of strong concentric undulations over most or all of its surface instead of on the beaks alone. This sculpture tends to become obsolete on the ventral-posterior part
of the shell, but it is clearly marked elsewhere on all specimens, and some show it almost equally strong over the entire shell. The beaks are not as prominently flattened as in nelsoni, and the valves are more highly inflated anteriorly, tapering off in greater contrast to a thin, produced posterior ring which is much narrower and longer than that of nelsoni.
No specimens as large as those of nelsoni in the Nelson collection have been found. C. bcrryi is very prolific in the Lower Zorritos formation. Crassatellites reevei Gabb, from Gatun, Santo Domingo, and Sapote, Costa Rica, is somewhat similar, and is perhaps the closest species known from the Americas. It differs chiefly in lacking the attenuate posterior wing of berryi. In addition the area behind the keel is flatter and smaller in berryi the beaks being higher and the keel more curved. [details]
MolluscaBase eds. (2025). MolluscaBase. Crassatellites (Scambula) berryi Spieker, 1922 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1714851 on 2025-09-11
The webpage text is licensed under a Creative Commons
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original description
Spieker, E. M. (1922). The paleontology of the Zorritos Formation of the north Peruvian oil fields. <em>The Johns Hopkins University, Studies in Geology.</em> 3: 1-197, pls. 1-10., available online at https://www.biodiversitylibrary.org/page/19066928
page(s): 131; pl. VII figs. 9, 10 [details]
page(s): 131; pl. VII figs. 9, 10 [details]
From editor or global species database
Original description Shell of medium size, anteriorly inflated, posteriorly attenuate. Anterior margin rounded; ventral margin rounded anteriorly, ascending posteriorly in a reflex curve to the apex of the first of two marginal angles. The posterior dorsal margin is about straight, descending to meet the apex of the second posterior marginal angle. Umbones high, erect, inflated, prosogyrate, proximate, the tops flattened,with the flat surface sloping backward. Anterior surface convex. A prominent keel, sharp on and near the beaks and flattened ventrally, runs from the umbo to the
lower marginal angle; before the keel there is a sulcus, narrow and sharp umbonally and shallower ventrally. Behind the posterior half of the keel is a flat to concave surface which is often bounded posteriorly by a second vestigial keel. Sculpture of strong concentric undulations, their dorsal slopes steeper, sharp on the beaks and decreasing in prominence ventrally but evident over all of the shell, sharper anteriorly on the median surface. There is additional sculpture of fine growth-lines. The concentric sculpture parallels the margins. Lunule deeply impressed, distinct, oval : escutcheon of similar lines but more lanceolate. Hinge normal. Muscle scars deeply impressed; internal valve-margins smooth ; parallel line sharp. Length, 40.5 ; height. 28 ; diameter, 20.5 mm.
This form differs from Crassatellites nelsoni. chieflv in the possession of strong concentric undulations over most or all of its surface instead of on the beaks alone. This sculpture tends to become obsolete on the ventral-posterior part
of the shell, but it is clearly marked elsewhere on all specimens, and some show it almost equally strong over the entire shell. The beaks are not as prominently flattened as in nelsoni, and the valves are more highly inflated anteriorly, tapering off in greater contrast to a thin, produced posterior ring which is much narrower and longer than that of nelsoni.
No specimens as large as those of nelsoni in the Nelson collection have been found. C. bcrryi is very prolific in the Lower Zorritos formation. Crassatellites reevei Gabb, from Gatun, Santo Domingo, and Sapote, Costa Rica, is somewhat similar, and is perhaps the closest species known from the Americas. It differs chiefly in lacking the attenuate posterior wing of berryi. In addition the area behind the keel is flatter and smaller in berryi the beaks being higher and the keel more curved. [details]
