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Oyenaster oblidus

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Journal Article

IMPLICATIONS FOR THE STUDY OF FOSSIL ASTEROIDEA (ECHINODERMATA) OF NEW GENERA AND SPECIES FROM THE EOCENE OF FLORIDA

DANIEL B. BLAKE, ROGER W. PORTELL
Published: 01 July 2009
Journal of Paleontology (2009) 83 (4): 562–574.
DOI: https://doi.org/10.1666/08-097R.1
...DANIEL B. BLAKE; ROGER W. PORTELL Abstract Oyenaster oblidus , Ocalaster timucum , and Ocalaster seloyi are new genera and species of the family Goniasteridae (Asteroidea) described from the Eocene Ocala Limestone of Florida. Although the fossil record of asteroids is sketchy, goniasterids appear...
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Figure 1. Map of Florida showing type localities of Oyenaster oblidus, Ocalaster timucum, and O. seloyi n. gen. and spp., FLMNH IP AL004, Alachua County, Newberry Quadrangle, USGS 7.5′, 1988; T9S, R17E; and CI009, Citrus County, Yankeetown Quadrangle, USGS 7.5′, 1988; T17S, R16E. Also shown is FLMNH IP CI001 (Citrus County, Yankeetown Quadrangle, USGS 7.5′, 1988, T17S, R16E) site of large ossicular concentration.

Figure 1. Map of Florida showing type localities of Oyenaster oblidus , O...

Published: 01 July 2009
Figure 1. Map of Florida showing type localities of Oyenaster oblidus , Ocalaster timucum , and O. seloyi n. gen. and spp., FLMNH IP AL004, Alachua County, Newberry Quadrangle, USGS 7.5′, 1988; T9S, R17E; and CI009, Citrus County, Yankeetown Quadrangle, USGS 7.5′, 1988; T17S, R16E. Also shown
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Figure 3. 1–6. Oyenaster oblidus n. gen. and sp., holotype, Florida Museum of Natural History UF 50000a, Upper Ocala Limestone, Florida. Scale bars 1, 2, 5–6, 15 mm; 3, 4, 5 mm. 1, 2, dorsal and ventral views of entire specimen; 3, 4, ossicular arrangement of ventral surface, arrows identify adambulacral series positioned at the straight furrow spine attachment line; two series of actinals adjacent to adambulacrals are robust and uniform; 5, 6, oblique and lateral views of arm margin showing ossicular form and overhang of marginals to form a shallow furrow between the marginal series. The tiny distal adambulacrals are upturned so that podia were directed distally; 7, 8, Calliderma spectabilisFisher, 1906, Bishop P. Museum W3732. Scale bars 10 mm. 7, dorsal lateral view of portions of disk and arm, small spine bases occur on marginals (arrow); 8, ventral view of disk with interbrachium partially cleared.

Figure 3. 1 – 6 . Oyenaster oblidus n. gen. and sp., holotype, Florida M...

Published: 01 July 2009
Figure 3. 1 – 6 . Oyenaster oblidus n. gen. and sp., holotype, Florida Museum of Natural History UF 50000a, Upper Ocala Limestone, Florida. Scale bars 1 , 2 , 5–6 , 15 mm; 3 , 4 , 5 mm. 1 , 2 , dorsal and ventral views of entire specimen; 3 , 4 , ossicular arrangement of ventral surface
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Figure 4. Oyenaster oblidus n. gen. and sp., holotype, Upper Ocala Limestone, Florida. Views of marginal series and adjacent series, oriented with IM below. Scale bars, 5 mm. 1–4, UF 50000e; 1, inclined ventral view; 2, lateral view; 3, IM and edge of SM series, abradial up; 4, abradial view. 5–9, UF 50000c, 5, 6, inclined dorsal views, right SM as seen in 6 partially replaced by small ossicles; 7, lateral view; 8, IM series, abradial up; 9, abradial view. 10–12, UF 50000d; 10, inclined dorsal view; 11, IM and edge of SM series, abradial up; 12, abradial view.

Figure 4. Oyenaster oblidus n. gen. and sp., holotype, Upper Ocala Limest...

Published: 01 July 2009
Figure 4. Oyenaster oblidus n. gen. and sp., holotype, Upper Ocala Limestone, Florida. Views of marginal series and adjacent series, oriented with IM below. Scale bars, 5 mm. 1–4 , UF 50000e; 1 , inclined ventral view; 2 , lateral view; 3 , IM and edge of SM series, abradial up; 4 , abradial