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Iotacrinus novamexicanus
Taxonomy
Iotacrinus novamexicanus was named by Rhenberg and Kammer (2013). It is not extant. Its type specimen is UMMP 74068, a calyx.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Iotacrinus novamexicanus Rhenberg and Kammer |
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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.
†Iotacrinus novamexicanus Rhenberg and Kammer 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. C. Rhenberg and T. W. Kammer 2013 | Diagnosis.—Calyx low to medium bowl; tegmen as high or slightly higher than calyx.
Description.—Calyx small, low bowl. Arms strongly grouped, extended into short arm lobes. Calyx plates with multiple radiating ridges. Basals small, three, equal in size. Basal circlet accounts for 10 percent of calyx height. Radial circlet is 35 percent of calyx height. Radials hexagonal, wider than high. Tegmen as high or slightly higher than calyx, lobed, inflated. Tegmen plates are numerous, medium in size, smooth to slightly nodose. Anal tube eccentric. Primanal hexagonal, slightly narrower than radials, followed by 2–3 plate formula. Interrays in contact with tegmen. First interradial hexagonal, followed by two plates. First primibrachial hexagonal, wider than high. Second primibrachial axillary, supporting one arm facet each. Arms and column not known. Paratypes: UMMP 74069, UMMP 74070, and five more specimens. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan et al. 2004, Kiessling 2004, Aberhan 1992 | |||||