1006
Journal of Paleontology 91(5):1001–1024
Additional material.—USNM 559497, figured by Clark (in Clark and Twitchell, 1915), from the Vincentown Formation; USNM 498879a, figured by Cooke (1959) as Cidaris sp. aff. C. splendens and MMNS 5132, both from the Salt Mountain Limestone, Clarke County, Alabama.
Occurrence.—Vincentown Formation,TimberCreek,Gloucester County, New Jersey (exact locality unknown); Vincentown, Burlington County, New Jersey (UTM Zone 18, E 520,995m, N4,421,446m, NAD83). SaltMountain Limestone, Salt Mountain, Clarke County, Alabama (UTM Zone 16, E 417,423m, N 3,478,716m, NAD83).
Remarks.—Description is based on the original published description. Morton (1842, p. 215) indicated that C. armiger was to replace the name for the same specimen named C. splendens the prior year (Morton, 1841), thus C. armiger is an objective junior synonym. Because fossil Cidaris, when known only from fragmentary material, are impossible to confidently identify to species level, all finds attributable to this genus have been lumped into this nominal species. Fragments of the test are fairly common at Salt Mountain, Alabama.
Family Psychocidaridae Ikeda, 1936 Genus Tylocidaris Pomel, 1883
Tylocidaris walcotti (Clark, 1891) Figure 4.7
1891 Cidaris walcotti Clark, p. 75. 1893 Cidaris walcotti; Clark, p. 37, pl. 6, figs. 4a–d. 1907 Cidaris walcotti; Weller, p. 281, pl. 7, figs. 10–13. 1915 Cidaris walcotti; Clark in Clark and Twitchell, p. 45, pl. 9, figs. 3a–d.
1925 Cidaris walcotti; Lambert and Thiéry, p. 559. 1941 Tylocidaris walcotti; Cooke, p. 6. 1959 Tylocidaris walcotti; Cooke, p. 12, pl. 1, figs. 7–9. 2000 Tylocidaris sp. indet. Smith and Jeffery, p. 14.
Types.—Holotype ANSP 1451, from the Vincentown Forma- tion, Timber Creek, New Jersey.
Description.—Test
small.Ambulacra narrow. Primary tubercles imperforate, set in medium, smooth areoles, separated, much of interambulacral plates covered in small, equally sized granules. Ambulacral plating simple. Spines fusiform, ribbed, thorned.
Additional material.—USNM 18828, figured by Cooke (1959) and USNM 648534, both from the Vincentown Formation, Blackwoodstown, New Jersey (exact locality unknown).
Occurrence.—Vincentown Formation, Timber Creek and Blackwoodstown, Camden County, New Jersey (exact localities unknown).
Remarks.—Description is based on the original published description. Smith and Jeffery (2000) singled out this species as indeterminate, but this does not invalidate the name.
All fragmentary material attributable to Tylocidaris from the Vincentown Formation is here assigned to this nominal species.
Tylocidaris macneili Cooke, 1959 Figure 4.4–4.6
1959 Tylocidaris macneili Cooke, p. 12, pl. 1, figs. 3–5.
Types.—Holotype USNM 562262a, paratypes (spines) USNM 563362b, c. All from the Clayton Formation, Henry County, Alabama.
Description.—Test small. Ambulacra narrow, plating simple. Primary tubercles imperforate, set in medium, smooth areoles, separated, much of interambulacral plates covered in small, equally sized granules. Spines fusiform, nodose, ribbed, ribs discontinuous and convergent towards tip, finely toothed.
Occurrence.—Clayton Formation, Henry County, Alabama (UTM Zone 16, E 671,3565 m, N 3,509,113 m, NAD83).
Remarks.—Description is based on the original description. Only known with certainty from this one locality, but all strongly nodose spines from the Clayton Formation are here attributed to this nominal species. Smith and Jeffery (2000) synonymized this species with T. hardouini (Desor, 1858), a species based entirely on spines with a distinctly clavate or club-like shape, but the spines of T. macneili are significantly different, being much more fusiform than clavate.
Tylocidaris salina Cooke, 1959 Figure 4.8
1941 Cidaris splendens (Morton) part, Cooke, p. 5, pl. 1, figs. 13–15.
1959 Tylocidaris? salina Cooke, p. 12, pl. 1, figs. 12–14. 2000 Tylocidaris salina; Smith and Jeffery, p. 39.
Types.—Holotype USNM 498879b, from the Salt Mountain Limestone, Salt Mountain, Clarke County, Alabama.
Description.—Spines fusiform, straight-ribbed, with smooth, regular beads ornamenting the ribs.
Additional material.—USNM648529, USNM 648530, USNM 648531, and MMNS 4882, all from the Salt Mountain Lime- stone, Salt Mountain, Clarke County, Alabama.
Occurrence.—Salt Mountain Limestone, Salt Mountain, Clarke County, Alabama (UTM Zone 16, E 417,423 m,N3,478,716 m, NAD83).
Remarks.—Description is based on the original published description. The spines of T. salina can be distinguished from T. walcotti by their straight, non-convergent ribs and smooth beading.
Order Salenioida Delage and Hérouard, 1903 Family Saleniidae Agassiz, 1838 Subfamily Saleniinae Agassiz, 1838
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