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Nuculana (Saccella) umboniinflata
Taxonomy
Nuculana (Saccella) umboniinflata was named by Eames (1951) [DISTRIBUTION: Eocene; Pakistan.]. Its type specimen is L. 79855, a shell, and it is not a trace fossil.
Sister species lacking formal opinion data
N. alferovi, N. amuriensis, N. bathurstensis, N. borsonii, N. calkinsi, N. camelorum, N. castor, N. coelata, N. coloradoensis, N. complanata, N. corbetensis, N. corpulentoides, N. demissa, N. deshayesiana, N. dodona, N. dodsoni, N. duplicarina, N. equilateralis, N. evansi, N. fiski, N. inornata, N. kenyana, N. kittensis, N. minmiensis, N. mutuata, N. saffordana, N. securiformis, N. smirna, N. sulcellata, N. travisana, N. turgeo, N. tyrolensis, N. yunnanensis, N. pennula, N. compalana, N. slodkewitschi, N. parleacllli, N. taioma, N. vadosa, N. carinata, N. elliptica, N. grandensis, N. perdita, N. perlonga, N. yatsushiroensis, N. meriani, N. duplicarina, N. fragilis, N. gnonom, N. nagaoi, N. wajampolkana, Saccella communis, Saccella miensis, Saccella panayensis, Saccella robusta, Saccella tumida
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Nuculana (Saccella) umboniinflata Eames p. 326 figs. pl. 9, figs. 14a, b |
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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.
†Nuculana (Saccella) umboniinflata Eames 1951
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. E. Eames 1951 | Shell of moderate size for the genus, transversely subelliptical, elongate,
rostrate, strongly inflated, especially in the umbonal region. Umbos only moderately prominent, rather broad, median in position. Antero-dorsal margin long, slightly convex, only slightly descendent. Anterior end rather narrowly rounded. Ventral margin gently convex, slightly emarginate towards the posterior end adjacent to the rostrum. Posterior end rostrate, produced, the tip appearing narrow and vertically truncated. Postero-dorsal margin long, slightly concave, only slightly more steeply descendent than the antero-dorsal margin. Ornament consisting of closely spaced, distinct concentric threads which are of the same width as or slightly wider than their intervals; there are 12 in 2 mm. on the central portion of the shell. Valve margins internally smooth. Characters of lunule and escutcheon not determinable, since the hinge teeth show through where the shell has been somewhat worn dorsally. |