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Nodipecten
Taxonomy
Nodipecten was named by Dall (1898) [Sepkoski's age data: T Mi-l-u R]. It is extant.
It was reranked as Pecten (Nodipecten) by Arnold (1906), Cooke (1919); it was reranked as Chlamys (Nodipecten) by Gardner (1945), DuBar (1958); it was reranked as Lyropecten (Nodipecten) by Jung (1971).
It was assigned to Pecten by Arnold (1906), Cooke (1919); to Chlamys by Gardner (1945), DuBar (1958); to Lyropecten by Jung (1971); to Mimachlamydini by Coan et al. (2000); to Pectinidae by Addicott (1974), Woodring (1982), Moore (1984), Smith (1991), Todd (2001); and to Pterioida by Sepkoski (2002).
It was reranked as Pecten (Nodipecten) by Arnold (1906), Cooke (1919); it was reranked as Chlamys (Nodipecten) by Gardner (1945), DuBar (1958); it was reranked as Lyropecten (Nodipecten) by Jung (1971).
It was assigned to Pecten by Arnold (1906), Cooke (1919); to Chlamys by Gardner (1945), DuBar (1958); to Lyropecten by Jung (1971); to Mimachlamydini by Coan et al. (2000); to Pectinidae by Addicott (1974), Woodring (1982), Moore (1984), Smith (1991), Todd (2001); and to Pterioida by Sepkoski (2002).
Species
Chlamys (Nodipecten) caloosaensis, N. arnoldi, N. arthriticus, N. articulosus, N. atlanticola, N. colinensis (syn. N. clydonus), N. estrellanus (syn. Pecten heermanni, Lyropecten volaeformis), N. macloskeyi, N. magnificus, N. nodosus (syn. Pecten decemradiatus), N. subnodosus, N. veatchii, N. veracruzensis
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1898 | Nodipecten Dall |
| 1906 | Pecten (Nodipecten) Arnold p. 49 |
| 1919 | Pecten (Nodipecten) Cooke p. 136 |
| 1945 | Chlamys (Nodipecten) Gardner p. 69 |
| 1958 | Chlamys (Nodipecten) DuBar p. 160 |
| 1971 | Lyropecten (Nodipecten) Jung p. 165 |
| 1974 | Nodipecten Addicott p. 182 |
| 1982 | Nodipecten Woodring p. 598 |
| 1984 | Nodipecten Moore p. B57 |
| 1991 | Nodipecten Smith pp. 86 - 87 |
| 2000 | Nodipecten Coan et al. p. 242 |
| 2001 | Nodipecten Todd |
| 2002 | Nodipecten Sepkoski |
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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.
G. Nodipecten Dall 1898
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Chlamys (Nodipecten) caloosaensis Dall 1898
†Lyropecten colinensis colinensis Hodson and Hodson 1927
†Nodipecten arnoldi Aguerrevere 1925
Nodipecten arthriticus Reeve 1853
†Nodipecten articulosus Cooke 1919
†Nodipecten atlanticola Anderson 1929
†Nodipecten colinensis Hodson and Hodson 1927
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†Lyropecten colinensis vokesae Smith 1991
Invalid names: Nodipecten clydonus Woodring 1982 [synonym]
†Nodipecten estrellanus Conrad 1856
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Invalid names: Lyropecten volaeformis Conrad 1842 [synonym], Pecten heermanni Conrad 1855 [synonym]
†Nodipecten macloskeyi Anderson 1929
Nodipecten magnificus Sowerby 1835
Nodipecten subnodosus Sowerby 1836
†Nodipecten subnodosus intermedius Conrad 1867
†Nodipecten veatchii Gabb 1866
†Nodipecten veracruzensis Smith 1991
†Pecten (Lyropecten) magnificus hamiltoni Arnold 1906
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. T. Smith 1991 | Valve outline circular in most species; profiles equally convex, moderately flat to moderately convex, commonly with angular ledges. Radial ribs and interspaces costate and lirate. Right-valve interspaces cor- respond to left-valve ribs of alternating widths; left-valve ribs commonly nodose, as expressed by the scheme N r Nc r N. Auricles subequal to equal, costate and lirate. Hinge length about half shell length in most species. Byssal notch deep, ctenolium prominent. Three pairs of hinge teeth in right valve, two pairs in left valve. Hollow nodes more prominent on wider key ribs of left valves, present in right valves of some species, and commonly flanged in western Atlantic taxa.
Nodipecten is similar to the Holocene representative of Lyropecten, L. magnificus, from the Galapagos Islands. Both have costate, lirate ribs and interspaces, a deep byssal notch, and the same hinge teeth. They differ in arrangement of left-valve nodose ribs: Nodipecten is char- acterized by the scheme N r Nc r N and Lyropecten by N 2r Nc 2r N. These schemes can be traced through separate, distinct ancestral lineages despite the conver- gence of Holocene forms. Lyropecten magnificus has more rectangular auricles than Nodipecten, and as far as is known, no tendency toward ledging.One taxon, N. arthriticus (Reeve) [= N. subnodosus, s.s. auctt.], is referred here to Nodipecten although its rib scheme differs from the others. Holocene left valves look most like those of N. subnodosus [= N. intermedius of Conrad (1867)] except for the rib scheme of N 2r Nc r N. It is classified as a Nodipecten although it evolved by the late Miocene, possibly by a genetic mutation from a Pacific Panamic Lyropecten. |