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Hippasteria tuberculata
Taxonomy
Goniaster tuberculatus was named by Forbes (1852). It is not extant. Its type specimen is Museum of Practical Geology.
It was recombined as Hippasteria tuberculata by Rasmussen (1972) and Lewis (1993).
It was recombined as Hippasteria tuberculata by Rasmussen (1972) and Lewis (1993).
Synonymy list
| Year | Name and author |
|---|---|
| 1852 | Goniaster tuberculatus Forbes p. 31 figs. pl. 4, fig. 5 |
| 1858 | Goniaster tuberculatus Heller p. 160 |
| 1876 | Goniaster tuberculatus Quenstedt p. 64 figs. pl. 92 fig. 14 |
| 1909 | Goniaster tuberculatus von Linstow p. 50 |
| 1972 | Hippasteria tuberculata Rasmussen pp. 48-50 figs. pl. 4 fig. 1-5 |
| 1993 | Hippasteria tuberculata Lewis p. 54 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Hippasteria tuberculata Forbes 1852
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. W. Rasmussen 1972 | A Hippasteria with rather large disc and long, very narrow arms. The dorsal surface of the disc is covered by polygonal plates forming a distinct radial row of rather large plates and a dorsolateral pavement of slightly smaller plates together with much smaller plates. The ventral surface of the disc is covered by polygonal plates forming oblique rows from the adambulacrals towards the marginals. The plates along the adambulacrals are rather large and elongate in the direction of the rows with parallel sides and oblique cut ends. The long and narrow arms have almost parallel sides and a single row of radial dorsal plates with a row of small dorsolateral plates on each side. There are no ventral plates between marginals and adambulacrals in the arm. Small rudimentary spines are placed in spine pits on the surface of dorsal and ventral plates. There is a row of 5-6 spines on the edge of each adambulacral against the ambulacral furrow, and two rows o smaller spines on the ventral surface. The margin is high and steep along the disc in the interradial area but rapidly diminishes towards the arm. It is formed by closely granulated superomarginals and inferomarginals. A stout conical spine is attached to each superomarginal and at least to some inferomarginals. The granulation of the marginals appears to be primary, but may be due to adhering rudimentary spines. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Aberhan 1992, Blake 1990, Aberhan et al. 2004 | |||||
Collections
No collection or age range data are available