File:The Eurypterida of New York plate 82.jpg

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Pterygotus (Erettopterus) globiceps nov. Page 374

  • 1 Nepionic stage showing the enormous size of the lateral eyes, the position of the ocelli and the small number of segments. × 30
  • 2 Another larval specimen showing slightly different form of carapace, thickened rim of eyes and small number of segments of tapering abdomen. × 30
  • 3 An older (neanic) stage in which the abdomen has assumed the proportion and composition of the adult stage. A broad thickened rim surrounds the eyes. × 12
  • 4 Carapace of a young individual showing somewhat different characters, apparently due to compression in longitudinal direction. × 15
  • 5 Fragment of carapace of young individual, showing the smooth cornea of the eyes partly separated from the facettae. × 5
  • 6 Well preserved carapace. Type of the species. × 3
  • 7 Largest carapace observed. Shows the lateral eye, somewhat distorted by oblique compression (indicated by the wrinkles) and the ocelli. On the antelateral corner a fragment of the marginal shield of the ventral side with traces of ornamentation is seen. Natural size
  • 8 Tergite showing antero-lateral lobes and ornamentation. × 3
  • 9 Second sternite with genital appendage of young female. × 3
  • 10 Swimming leg. Natural size

Pterygotus (Erettopterus) sp.

  • 11 Portion of a telson showing fine bristles on the margin. Natural size
  • 12 Telson of young individual. × 3

The figures 8, 10, 11 are referred with doubt to this species.

Pterygotus? sp. 13 Problematical fossil, possibly the female genital appendage of a Pterygotus [cf. similar appendage of Pterygotus anglicus, Huxley and Salter, pl. 3, fig. 4, 5, 7]. Horizon and locality. Shawangunk grit. Otisville, N. Y.

The originals are the State Museum

The Eurypterida of New York. Volume 2. New York State Museum Memoir 14, plate 82
Date
Source California/Google Books
Author John Mason Clarke (1857-1925) and Rudolf Ruedemann (1864-1956)
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The author died in 1956, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 60 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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current23:44, 8 April 2012Thumbnail for version as of 23:44, 8 April 2012963 × 1,320 (342 KB)Ras67 (talk | contribs)cropped
12:38, 17 June 2011Thumbnail for version as of 12:38, 17 June 2011971 × 1,333 (427 KB)Enomil (talk | contribs){{Information |Description=''The Eurypterida of New York''. Volume 2. New York State Museum Memoir 14, plate 82 |Source=[http://babel.hathitrust.org/cgi/pt?id=uc1.31822000675504 California/Google Books] |Date=1912 |Author=John Mason Clarke (1857-1925) and

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