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Hannestheronia australis
Taxonomy
Hannestheronia australis was named by Vinther et al. (2012). Its type specimen is C730, an other (fully articulated), and it is a 3D body fossil. Its type locality is Waboomberg Formation (4th Shale), Tafelberg, which is in an Eifelian marine siltstone/mudstone in the Waboomberg Formation of South Africa. It is the type species of Hannestheronia.
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Hannestheronia australis Vinther et al. pp. 1013 - 1014 fig. 3 |
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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.
†Hannestheronia australis Vinther et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Vinther et al. 2012 | Strobilepid with a distinct reticulate ornament on all dorsal plate surfaces.
The holotype is fully articulated concealing the outlines of the plates (Fig. 3A, C, D). The head plate is almost pentagonal with an arcuate anterior area and straighter lateral areas. The tail plate is similar in outline, defined by an arcuate posterior area and four facets: left and right lateral flanking an anterior area with two facets separated by a median keel. The umbo is posteriorly positioned. Lateral intermediate plates 2–5 are divided into a raised lateral and inner area with almost straight margins and a depressed median area with an arcuate anteriorly convex margin. There appears to have been a row of median intermediate shell plates along the midline. An imperfect impression of this plate is evident in rows 1 and 3–5 (Fig. 3A). A central raised triangular structure similar to the median plate in other multiplacophorans is particularly evident in row 4. The upper surface of all shell plates and spines is covered by a distinctive reticulate, rhombic pattern of fine ridges (Fig. 3A, C, D). The shell plates show densely pectinated margins in many places (Fig. 3E). The most anterior preserved spine, which is almost complete, is shorter than those behind it, indicating that spine length may increase posteriorly. The marginal spines (Fig. 3) have a median dorsal groove as in Hercolepas (Appendix S1) and other strobilepids. |
Measurements
No measurements are available
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| Source: c = class | |||||
| References: Kiessling 2003, Vendrasco et al. 2004 | |||||