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Swataria derstleri
Taxonomy
Swataria derstleri was named by Blake (2014) [North Museum of Natural History and Science, Lancaster, Pennsylvania; Paleontology-Echinodermata (P-E) collection. Holotype counterparts P-E 309-K (oral) and P-E 309-S (aboral); paratypes counterparts P-E 57-J (oral), PE-57-I (aboral) and an isolated arm P-E 57-G; P-E 348 (oral) and P-E 348-A (aboral); counterparts P-E 349 and P-E 349-A; counter- parts P-E 350 (aboral) and P-E 350-A (oral).]. Its type specimen is See comments, a partial skeleton, and it is a 3D body fossil. Its type locality is Swatara Gap, 1 mile north-northwest of Lickdale, which is in an Edenian prodelta siltstone/mudstone in the Martinsburg Formation of Pennsylvania. It is the type species of Swataria.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Swataria derstleri Blake p. 1165 figs. Figure 2-4 |
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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.
†Swataria derstleri Blake 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. B. Blake 2014 | Body wall ossicles small, plate-like, closely abutted, weakly rounded to polygonal in outline, not differenti- ated into carinal, primary circlet series. Marginal ossicles absent. Axillary broad, upright, shield-like. Madreporite ventrally positioned beyond axillary. Podial pores lacking from proximal- most ambulacrals but present medially and distally. Arm adambulacrals more or less L-shaped; base of ‘‘L’’ abutting transverse ridge of ambulacral, ascending arm of ‘‘L’’ directed proximally and thereby closing the podial position; a distally directed basal flange present on at least some adambulacrals. Arm adambulacrals bearing short, robust spine and spine base. MAO bearing single prominent spine base on the distal flange; abutted ventral oral edge of MAO pair not forming narrow ridge, as in Phragmactis. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Aberhan 1992, Bambach et al. 2007 | |||||