Camptonectes pueyrrydonensis Stanton, 1901
STANTON, T. W. 1901. The marine Cretaceous invertebrates. In W. B. Scott (ed.), Reports of the Princeton University Expeditions to Patagonia, 1896–1899. Vol. 4, Paleontology I, part I , pp. 3-43. J. Pierpont Morgan Publication Fund, Princeton, New Jersey. [p. 12, pl. 4, fig. 1]
1901 Pecten (Camptonectes) pueyrrydonensis Stanton, 1901
T. W. Stanton, 1901, plate 4.
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«Shell of medium size, ovate or subcircular in outline, moderately convex; right valve with unequal ears, the anterior one much larger, triangular with rounded extremity and bounded below by a deep byssal sinus, posterior ear much smaller, with the outer margin oblique and broadly rounded above, both with radiating striae; the body of the shell marked by rather conspicuous irregularly spaced concentric lines and by very fine curved radiating impressed lines.
Height, 25 mm.; length of hinge line 11 mm.; greatest length (about the middle of the valve) 23 mm. This description is drawn from the type, a well preserved right valve, from the locality ten miles east of Lake Pueyrrydon. The collection from four miles east of the same lake contains some less perfect specimens believed to belong to this species, and among them are two left valves having the same sculpture and general form as the type. These are slightly more convex than the right valve and the anterior ear is similar in form and only slightly larger than the posterior. The species has the typical Camptonectes sculpture and form as seen in a number of described Jurassic and Cretaceous species, but according to Dall ¹ Camptonectes is not of generic or even subgeneric rank but should be placed as a section under Pseudamusium. Locality and position.— From the Ammonite (Belgrano) beds at the two localities above mentioned.» ¹ Trans. Wagner Free Institute, Vol. Ill, pt. IV, p. 697, Philadelphia, 1898.
TIMOTHY WILLIAM STANTON, 1901
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