Karnekampia Wagner, 1988
WAGNER, H. P. 1988. The status of four scallop species (Mollusca; Bivalvia; Pectinidae), with description of a new genus. Basteria, 52: 41-44, figs. 1-3. [p. 41]
«Karnekampia nov. gen.
Type species.— Pecten bruei Payraudeau, 1826 (fig. 1).
Other species.-- Pecten sulcatus Müller, 1776 (fig.2); Chlamys alicei Dautzenberg & Fischer, 1897; Chlamys gilchristi Sowerby 3rd, 1904 (fig. 3).
Etymology.— The new genus is named in honour of Mr. Cor Karnekamp, founder and promotor of the Malacologische Contactgroep Amsterdam, that will celebrate its 25th anniversary this year. Cor is one of the most important people that made malacology popular among a broad public in The Netherlands.
Diagnosis.— Shell longer than wide, rather delicate. Valves inequilateral, left valve more convex than the right one. Pronounced (primary) ribs of lelt valve single and hollow, hiding riblets formed by rows ol small tubercles, that become visible when the ribs are damaged. Secondary ribs also consist of rows of small tubercles which, however, are not hidden. In between primary and secondary ribs fine grooves may be observed. All ribs of right valve equally pronounced, but clustered on broad plicae that coincide with the interspaces between the pronounced ribs of the left valve. Ribs appear gradually at equal distances from the apex. Anterior auricles twice as large as posterior, with a reticulate structure carrying tubercles at each crossing-point. In between this structure fine grooves are visible. Posterior auricles with tuberculous ribs only.
Remarks.— Karnekampia canbe distinguished from both Chlamys s.s. and Manupecten by the presence of hollow ribs on the left valve. The sculpture in Chlamys s.s. consists of squamae, while Karnekampia has tubercles. Generally the shells of Chlamys s.s. are also more solid. Manupecten is characterized by a shagreen pattern covering the whole shell (including the upper surface of the ribs). It only has tubercles on the auricles, which are much larger than in Karnekampia. Lucas (1979: 9) earlier pointed out that "Chlamys" bruei is clearly diflerent from Chlamys s. s. He thought of proposing a new generic name for it, Porosichlamys, but directly rejects the idea, thereby creating the proposed name as a publication in synonymy according to art. 11e of the International Code of Zoologícal Nomenclature (Dr. L. B. Holthuis, personal communication). Lucas (op.
cit.) also relegated K. sulcata to the synonymy of K. bruei, as was done by previous authors. Indeed, a mix-up has often occurred in the literature regarding both species, but they can be distinguished morphologically (Wagner, in prep.). Geographically both species are also isolated; K. bruei is restricted to the Mediterranean and the adjacent part in the Atlantic Ocean (from the Bank of Galicia south to NW. Africa), while K. sulcata is only found in the Arctic Ocean, Norway, Iceland, Faroër Islands, Shetland Islands, north coast of Scotland, the Irish Sea and Helgoland.» HOWARD-PAUL WAGNER, 1988
|
Karnekampia bruei (Payraudeau, 1826); H. P. Wagner, The status of four scallop species (Mollusca; Bivalvia; Pectinidae), with description of a new genus, figure 1; figure 2: Karnekampia sulcata (Müller, 1776); figure 3; Karnekampia gilchristi (Sowerby 3rd ,1904).
|
«Karnekampia was also present by Rupelian time, an example being the species from the Rupelian of Germany identified by Neuffer (1973: 37, pI. 5, figs. 18, 19) as Chlamys (Chlamys) striatocostata (Münster in Goldfuss, 1833). Specimens of this species reported by Glibert (1957: 20, pI. 1, figs. 15a-d) from the Chattian of Belgium were examined by the author. They have the third-order T-shaped costellae and commarginal lirae that mark Node P6, and Glibert remarked on the probable relationship of this species to Peplum Bucquoy, Dautzenberg, and Dollfus, 1889, a genus now regarded by most malacologists as a junior synonym of Pseudamussium.»
WALLER, T. R. 2006. New Phylogenies of the Pectinidae (Mollusca: Bivalvia): reconciling Morphological and Molecular Approaches. In S.E. Shumway & G.J. Parsons (Ed.) 2006: Scallops: Biology, Ecology and Aquaculture, 1-44. [p. 19]
|