1014
Journal of Paleontology 91(5):1001–1024
1830a Ananchytes cinctus Morton, p. 246, pl. 3, fig. 7. 1830a Ananchytes fimbriatus Morton, p. 245, pl. 3, fig. 9. 1830b Ananchytes cinctus; Morton, p. 200. 1830b Ananchytes fimbriatus; Morton, p. 200. 1834 Ananchytes cinctus; Morton, p. 78, pl. 3, fig. 19. 1834 Ananchytes fimbriatus; Morton, p. 78, pl. 3, fig. 20. 1840 Holaster cinctus; Agassiz, p. 1. 1847 Holaster fimbriatus; Agassiz and Desor, p. 141. 1851– Cardiaster cinctus; Bronn, p. 205. 1852 1853– Cardiaster cinctus;d’Orbigny, p. 147, pl. 905, fig. 4. 1856 1853– Cardiaster fimbriatus;d’Orbigny, p. 147, pl. 905, fig. 3. 1856 1858 Cardiaster cinctus; Desor, p. 346. 1891 Holaster cinctus; Clark, p. 77. 1893 Cardiaster cinctus; Clark, p. 75, pl. 37, figs. 1a–h. 1907 Cardiaster cinctus; Weller, p. 296, pl. 16, figs. 1–8. 1915 Cardiaster cinctus; Clark in Clark and Twitchell, p. 83, pl. 36, figs. 2a–h.
1942 Holaster cinctus; Cooke, p. 52. 1959 Holaster cinctus; Cooke, p. 65, pl. 27, figs. 1–5.
Type.—Holotype ANSP 1485, from the Vincentown Forma- tion, Timber Creek, New Jersey. Holotype of Ananchytes fimbriatus ANSP 38170 (ex “258”,ex “1485”).
Description.—Test cardiate, domal, notched anteriorly, oral surface nearly flat, with slight posterior keel. Apical disc slightly anterior of center, elongate, paired plates juxtaposed, four genital pores. Anterior ambulacrum depressed, pores small, pore pairs slightly oblique, ornamented with two small tubercles or beads. Paired ambulacra flush, subpetaloid, open distally, anterior pair diverge at 140º, posterior pair diverge at 70º; pores equal, elongate, conjugate. Periproct elliptical, taller than wide. Peristome in anterior quarter of test, semicircular, transverse, lipped. Primary tubercles crenulate, sunken aborally, largest aborally in anterior paired interambulacra and proximal to apical disc, reduced in size towards margin; large but flush orally in paired interambulacra, constant size, with asymmetric areoles, posterior paired ambulacra naked orally, finer tuberculation covers plastron. Plastron protosternous, possibly with small extension of labrum in contact with second sternal plate. No fascioles.
Additional material.—USNM 29467, USNM 540912, Vincen- town Formation, Burlington and Monmouth Counties, New Jersey.
Occurrence.—Vincentown Formation, Timber Creek, Glouce- ster County, New Jersey (exact locality unknown). Other localities in Rancocas Creek, Vincentown, Burlington County, and Big Brook, Marlboro, Monmouth County, New Jersey listed by (Cooke, 1959).
Remarks.—Description is based on the original description. There is little to add to Cooke’s (1959) description. The deep anterior sulcus and protosternous plating of P. cinctus are basis for its placement in Pseudholaster rather than Holaster.
Morton’s (1830a) species Ananchytes cinctus and A. fimbriatus were synonymized by Clark (1891) as Holaster cinctus. Smith and Jeffery (2000) suggested that P. cinctus is synonymous with P. faxensis (Hennig, 1898), but P. cinctus differs by a deeper and more pronounced anterior sulcus and a smaller peristome set farther back from the anterior margin.
Subfamily Echinocorythinae Wright, 1856 Genus Echinocorys Leske, 1778
Echinocorys ovalis (Clark, 1893) Figure 7.9, 7.10
1893 Ananchytes ovalis Clark, p. 74, pl. 36, figs. 1a–h. 1907 Ananchytes ovalis; Weller, p. 295, pl. 13, figs. 1–8. 1915 Ananchytes ovalis; Clark in Clark and Twitchell, p. 81, pl. 35, figs. 1a–h.
1924 Echinocorys ovalis; Lambert and Thiéry, p. 418. 1942 Echinocorys ovalis; Cooke, p. 39. 1959 Echinocorys ovalis; Cooke, p. 66, pl. 27, figs. 6–9.
Type.—There were two specimens with the identification USNM 559479 in the Smithsonian collection. Clark in Clark and Twitchell (1915), figured as the type the specimen with damage to the aboral portion of interambulacrum 4. This is the same specimen figured by Cooke (1959) as a cotype, and is here designated the lectotype, with a new catalog number USNM 636366. The other specimen, with damage to the posterior of the test, has the new catalog number USNM 636367. Both specimens are from the Vincentown Formation, Vincentown, New Jersey.
Description.—Outline ovate, profile domal with nearly flat oral surface, rounded margin, protruding somewhat around the submarginal periproct. Apical disc elongate, four gonopores, paired genital plates in contact, anterior pair separated from posterior by ocular plates; genital 2 (with madreporite) largest, genital 3 smallest plate. Ambulacra subpetaloid, pores elongate, pairs transverse near apical disc, becoming progressively more oblique towards margin, anterior pair diverge at 150º, posterior pair diverge at 60º. Peristome transverse, oval, inclined, in the anterior third of the test. Plastron meridosternous. Primary tubercles small, sparsely scattered, denser aborally towards posterior margin; denser on oral surface except posterior paired ambulacra naked. No fascioles.
Additional material.—UF 68910, from the Clayton Formation, Wilcox County, Alabama.
Occurrence.—Vincentown Formation, Vincentown, Burlington County, New Jersey (exact locality unknown). Clayton Forma- tion (McBryde Member), creek west of Alabama River, off State Highway 10 east of Kimbrough, Wilcox County, Alabama (UTM Zone 16, E 460,334 m, N 3,536,159 m, NAD83).
Remarks.—Description is based on the original description. The UF specimen from Alabama is somewhat crushed and missing the apical area but in other respects is indistinguishable from material from the Vincentown Formation of New Jersey.
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