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Taxonomy
Nucula anodontoides was named by Meek (1871). It is a 3D body fossil.
It was recombined as Economolopsis anodontoides by Hoare et al. (1989); it was recombined as Nuculopsis anodontoides by Kues (1984) and Kues et al. (2002).
It was recombined as Economolopsis anodontoides by Hoare et al. (1989); it was recombined as Nuculopsis anodontoides by Kues (1984) and Kues et al. (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1871 | Nucula anodontoides Meek p. 71 |
| 1930 | Nucula anodontoides Sayre pp. 104 - 105 figs. pl. 8 f. 8-8a |
| 1984 | Nuculopsis anodontoides Kues |
| 1989 | Economolopsis anodontoides Hoare et al. p. 585 |
| 2002 | Nuculopsis anodontoides Kues et al. p. 127 figs. 4A-D |
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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.
†Economolopsis anodontoides Meek 1871
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. B. Meek 1871 | Shell ovate, ventricose, the greatest convexity being in the umbonal region; posterior side short, faintly subtruucate vertically at the immediate extremity; basal margin semielliptical in outline; cardinal margin nearly straight externally, equaling about half the length of the valves, carinate at the extremities; anterior side rather long, very narrowly rounded in the middle of the extremity, to which point the basal margin rounds up rather gradually, and the anterior dorsal edge slopes obliquely from the edge of the hinge; beaks moderately prominent, convex, incurved without very distinct obliquity and located about halfway between the middle and the posterior side; umbonal slopes, both before and behind, subangular, in consequence of the presence of a lunule and escutcheonlike impression, of which that on the anterior or longer side is the larger, being usually continued nearly or quite to the extremity of that side. Surface smooth, or only showing under a magnifier very obscure lines of growth. Length of the largest specimen, 0.57 inch; height, 0.40 inch; convexity, 0.30 inch. Some of the other specimens are proportionately more convex. | |
| B. S. Kues et al. 2002 | The beaks are relatively high, nearly orthogyrate to opisthogyrate, and are situated about two-thirds of the distance from the anterior to posterior margins. The anterior valve margin is more acutely convex than the more broadly rounded posterior margin, and the posterodorsal margin is slightly convex. Ornamentation consists of fine, closely spaced, locally irregular, comarginal growth lines. Slight displacement of the valves on a few specimens reveals as many as 15 taxodont hinge teeth anterior to the beak. These are small and rectangular opposite the beak but become progressively larger and more chevron shaped anteriorly |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Aberhan et al. 2004, Mikkelsen and Bieler 2008 | |||||
Age range: base of the Serpukhovian to the top of the Virgilian or 330.90000 to 298.90000 Ma
Collections (30 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Serpukhovian | USA (Oklahoma) | Nucula anodontoides (5611) | |
| Kashirian - Myachkovian | USA (New Mexico) | Nuculopsis anodontoides (46548) | |
| Desmoinesian | USA (Oklahoma) | Nuculopsis anodontoides (8632 8633 8634 8635 8636 8638 8639 8640 8641 8642 8643 8644 8645 8647 8648) | |
| Missourian | USA (Kansas) | Nucula anodontoides (160173) | |
| Missourian | USA (New Mexico) | Nuculopsis anodontoides (50767) | |
| Virgilian | USA (Ohio) | Nucula anodontoides (71993) | |
| Virgilian | USA (Texas) | Nuculopsis anodontoides (1048 1051 1053 1054 1060 1101 1131 225763) | |
| Virgilian | USA (New Mexico) | Nuculopsis anodontoides (146819 146828) |