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Nicolella strasburgensis
Taxonomy
Nicolella strasburgensis was named by Butts (1941). It is not extant.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1941 | Nicolella strasburgensis Butts p. 110 figs. pl. 95 f. 32-33 |
| 1956 | Nicolella strasburgensis Cooper p. 318 figs. pl. 39B f. 7-1 |
| 1962 | Nicolella strasburgensis Williams pp. 104 - 105 figs. P1. VIII, figs. 33, 38, 40 |
| 2014 | Nicolella strasburgensis Candela and Harper p. SI |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Nicolella strasburgensis Butts 1941
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Cooper 1956 | Fairly large for the genus, wider than long and with hinge narrower than the greatest shell width which is at or near the middle. Cardinal extremities rounded. Lateral margins gently rounded, anterior margin moderately rounded. Surface marked by strong angular costae that increase by intercalation : besides the primary costae, two sets of costae appearing, one near the middle and the other on the anterior and lateral margins. Strong, zigzag concentric growth lines over entire surface. Pedicle valve moderately convex in lateral profile and somewhat more strongly convex in anterior profile. Umbonal region swollen, the swollen part continued anteriorly nearly to the front margin to form a poorly defined fold. Slopes to cardinal extremities fairly steep in adults. Cardinal extremities deflected slightly.
Interarea nearly othocline, slightly curved. Beak overhanging interarea slightly. Delthyrium open. Interior with short dental plates and short cordate muscle area. Diductor scars fairly large, adjustor scars small. Vascula media indistinct but typically orthoid. Brachial valve moderately concave with the deepest portion along the middle line. Umbonal region concave. Flanks bounding longitudinal concave area nearly flat. Interarea short hypercline. Chilidium small. | |
| A. Williams 1962 | Diagnosis.---Concavo-convex, subcircular Nicolella with maximum width about the middle of the shell and slightly obtuse cardinal angles; chilidium small; ornamentation multicostellate consisting of about 17 angular costae the median 10 of which give rise to costellae including internal tertiaries; subcordate ventral muscle-scar vaguely impressed, about one-third as long as the pedicle valve. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy 2009, Aberhan et al. 2004 | |||||