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Gogia ojenai
Taxonomy
Gogia ojenai was named by Durham (1978). Its type specimen is UCMP 14526a, b and is a 3D body fossil. Its type locality is UCMP loc. D-6344, Marble Mountains, near Cadiz, which is in a Dyeran marine shale in the Latham Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Gogia ojenai Durham pp. 195 - 196 figs. pl. 1 f. 1-9 |
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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.
†Gogia ojenai Durham 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. W. Durham 1978 | Calyx globose, about 18 mm in diameter; calyx plates larger in upper half of calyx than proximal to holdfast, prominent radiate ornamentation; epispires present on calyx plates, notches moderately shallow, vary-ing in number according to size of plates; at least 10 long brachioles, spiralled in left hand direction, cover plates present; holdfast rela-tively short, with strongly expanded distal at-tachment area, composed of numerous small unornamented plates; plates of oral region at top of calyx disordered so that arrangement cannot be recognized but brachioles appear to have been attached in groups of two or more; epispires range from as few as 4 on smaller calyx plates to possibly 12 on larger plates; epispires usually broadly "V" shaped but a few are broad "U"s; calyx plates ornamented with prominent sharp radiating ridges, ranging from as few as 4 on smaller plates to as many as 12 on larger plates, ridges occasionally meet in center of plate but more often central por-tion of ridges is replaced by prominent tuber-cles; on larger plates ridges between epispires extend to margin while ridges corresponding to apex of epispires bifurcate at margin of notch and form a bordering ridge around apex; larger calyx plates restricted to upper portion of calyx, within lower third they rapidly de-crease in size until they merge with the small unornamented plates at the top of the holdfast; on the most complete brachiole there are about 6 spirals in 15 mm, beginning close to the calyx; brachiolar plates alternating, about 7 on a side in 5 mm near base, brachiolar cover plates 2 to each brachiolar plate (P1. 1, fig. 3); median canal of brachiolar plates (Sprinkle, 1973, p. 26, Text-fig. 10, B, C) present (P1. 1, fig. 2); distal expanded attachment area of the holdfast with about 18 plates across the width, imbricating slightly distally, plates with a broad semiconical head. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum | |||||
| References: Caron and Jackson 2008, Aberhan et al. 2004, Aberhan 1992 | |||||