Lindapecten lindae Petuch, 1995
PETUCH, E. J. 1995. Molluscan discoveries from the Tropical Western Atlantic Region. La Conchiglia, 27 (275): 36-41, figs 1-11. [p. 40, figs. 10, 11]
Lindapecten lindae n. sp.
«Type material
Besides the holotype (Figs. 9, 10) [sic] in the Cornegie Museum, a paratype is present in the collection of the Author. Locus typicus
200 m depth, 50 km South of Apalachicola, Florida. Distribution and Habitat
Found on coralline algal rubble bottoms, of depths of 200 m, along the Northeastern Gulf of Mexico Description
Shell suborbicular in outline, with valves flattened, only slightly inflated; bottom valve only slightly more flattened than top valve, which is slightly more convex; umbones not prominent, in same plane as hinge; posterior commissure straight, anterior commissure slightly contorted or flexed near auricular area; anterior auricle large, narrow, distinctly projecting; both auricles with 6 large, scaly ribs; smaller secondary ribs sometimes present between moin auricular ribs; hingeline spinose, with spines along edge of bottom valve longer than those of top valve, comblike in appearance; holotype and paratype both with 19 large, equally-spaced rodial ribs; each rib with 3 rows of spines, comprising one central row and two lateral rows; spines of central row 2 to 3 times longer than those of lateral rows; areas between ribs smooth; central row of spines not equal in size on all ribs, with 5 ribs having longer central spines than other 14 ribs; ribs with longest central spines include central midline rib and 2 pairs of lateral ribs (shown here best in fig.10); third posteriormost rib has longest and thickest spines of all ribs, with spines being 2 to 3 times lorger than others, producing comblike appearance; color pale salmon-pink with large, evenly-spaced, dark red-brown, zig-zag flammules arranged in horizontal rows; top valve more brightly colored than bottom valve. Etymology
Named after my wife, Linda Joyce Petuch. Discussion
Lindapecten lindae is most similar to the widespread Caribbean L. muscosus (Wood, 1828), but differs in being a flatter, much more compressed species with far greater spinous development. Although both species have three rows of spines on each rib, the spines of L. muscosus are proportionally much smaller and are all of approximately equal size. ln L. lindae, however, the central spines of each rib are much larger, than the lateral spines and some rows of central spines are even longer than the others, producing a secondary radial pattern that stands above the rest of the shell. The extremely large and well-developed spines along the posterior edge of the shell (mostly on the third posteriormost rib) is also very distinctive and is not seen on L. muscosus. The new species has a planar hinge line with depressed umbones, while the umbones of L. muscosus project well above the hinge line. The auricles of the two species are also different, with the posterior auricle of L. lindae being broader and straight-edged and lacking the shallow concavity seen on the posterior auricle of L. muscosus. The color patterns of the two species also differ greatly, with L. muscosus having a relatively uniformly colored shell and L. lindae having a much more colorful shell with horizontal bands and flammules. Although L. muscosus is commonly colored deep red, red-brown, orange or yellow, the pale solmon-pink color of L. lindae has not, to my knowledge, been seen on any specimen of L. muscosus. ln the new species, the bottom valve is distinctly paler and less colorful than the top volve, while in L. muscosus the bottom valve is generally only slightly paler, and in some specimens is equal in color intensity. EDWARD JAMES PETUCH, 1995
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E. J. Petuch, 1995, figures 10, 11.
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