Pectinella sigsbeei (Dall, 1886)
DALL, W. H. 1886. Report on the Mollusca, Part I. Brachiopoda and Pelecypoda. Reports on the results of dredging, under thesupervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer “Blake”…. Bulletin of the Museum of Comparative Zoology at Harvard University, 12: 171-318, pls. 1-9. [p. 223, pl. 4, fig. 2]
1886 Pecten (Pseudamusium) [sic] sigsbeei Dall, 1886
W. H. Dall, 1886, plate 4.
|
«Valves rather convex, the left one most so; both apparently polished, but with microscopic silky concentric striae; no radiating sculpture, no prismatic markings; anterior auricles well marked, very small, oblique; posterior auricles larger, with a broad shallow byssal sulcus but no fasciole or pectinium, the markings only of concentric growth lines; color brownish with opaque white splashes. Alt. 11.5; Ion. 9.1 ; diam. max. 3.75 mm.
Two valves were obtained by Sigsbee in 158 fms., Lat. 22° 10', W. Lon. 82° 20', near Havana, Cuba. This little species is very recognizable by its plump oval shape, like an apricot stone, and its smooth surface destitute of radiating sculpture.» WILLIAM HEALEY DALL, 1886
|
«The species richness of the Syncyclonematinae declined dramatically after the end-Cretaceous extinction. A few species occur in the Palaeocene (Danian) of Greenland, Denmark, and the Chatham Islands (Stilwell, 1998; Heinberg, 1999; Petersen & Vedelsby, 2000), but members of the subfamily are unknown until the late Pleistocene or Holocene of Vanuatu (formerly the New Hebrides; Waller, 1977). The rarity and highly disjunct distribution of Pectinella in the present-day Caribbean and Pacific (Hawaii and New Caledonia) attest to the improbability of the group being found in the Cenozoic fossil record.»
WALLER, T. R. 2006. Phylogeny of families in the Pectinoidea (Mollusca: Bivalvia): importance of the fossil record. Zoological Journal of the Linnean Society, 148: 313-342, figs. 1-12. [p. 327]
|
Pectinella sigsbeei (Dall, 1886); T. R. Waller, 2006, Phylogeny of families in the Pectinoidea (Mollusca: Bivalvia): importance of the fossil record, figure 8.
|