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Nuculana (Saccella) rakhiensis
Taxonomy
Nuculana (Saccella) rakhiensis was named by Eames (1951) [DISTRIBUTION: Eocene; Pakistan.]. Its type specimen is L. 79842, a shell, and it is not a trace fossil. Its type locality is Fossil Bed F.1986, Rakhi Nala, which is in a Bartonian marine shale in the Drazinda Formation of Pakistan.
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. turgeo, N. vadosa, N. smithvillensis, N. carinata, N. elliptica, 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) rakhiensis Eames p. 323 figs. pl. 9, fig. 9 |
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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) rakhiensis Eames 1951
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. E. Eames 1951 | Shell of moderate size for the genus, transversely oval. Umbonal region
somewhat crushed, but umbos probably submedian in position. Antero-dorsal and postero- dorsal margins of about the same length, fairly straight, gently descendent. Anterior end moderately narrowly rounded. Ventral margin moderately convex, internally smooth. Posterior end bluntly rostrate, not produced, the tip of the rostrum being situated rather high up. Siphonal region vaguely flattened, with no indication left of any radial fold. Ornament consisting of distinct but very fine, sharp, narrow concentric threads with wide intervals. Although distinct, these threads are so narrow that they show little width; they are spaced # mm. apart on the ventral portion of the holotype. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Aberhan et al. 2004, Kiessling 2004, Sanchez Roig 1926 | |||||
Collections
No collection or age range data are available