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Idiospira carrickensis
Taxonomy
Protozyga carrickensis was named by Reed (1917).
It was recombined as Cyclospira carrickensis by Williams (1962); it was recombined as Idiospira carrickensis by Candela and Harper (2014).
It was recombined as Cyclospira carrickensis by Williams (1962); it was recombined as Idiospira carrickensis by Candela and Harper (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Protozyga carrickensis Reed pp. 945 - 946 figs. Plate XXIV, figs. 30, 31 |
| 1962 | Cyclospira carrickensis Williams pp. 250 - 251 figs. Pl. XXV, figs. 43, 50, 51 |
| 2014 | Idiospira carrickensis Candela and Harper pp. Supplement 1 |
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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.
†Idiospira carrickensis Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell subpentagonal, unequally biconvex, widest across middle, rounded, anteriorly emarginate, and sinuated. Pedicle-valve convex, swollen, subcarinate, highest along middle line, with short broad shallow groove on keel near anterior margin; beak small, pointed, incurved, rising above hinge-line, with apex perforated, and small triangular broad fissure below. Brachial valve weakly convex or flattened, bilobed by narrow median straight impressed line and by broad indefinite sinus near anterior margin ; beak small, inconspicuous. Surface of valves smooth. Interior unknown. | |
| A. Williams 1962 | Unequally biconvex, subpentagonal Cyclospira with a truncated anterior margin narrowly emarginate medianly; pedicle valve deeper than the brachial valve, about as long as wide, with a high, subcarinate, flattened, postero-median zone becoming cleft by a sulcus anteriorly and with gently convex flanks, ventral umbo incurved, delthyrium apparently unrestricted by deltidial plates; brachial valve with narrow median sulcus posteriorly becoming wider and shallower towards the anterior margin, lateral areas gently curving; details of internal morphology unknown but specimens sufficiently exfoliated to show a strong dorsal median septum extending anteriorly for about three-fifths of the length of the valve and the absence or obsolescence of the dental lamellae. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||