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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Choia striata
Taxonomy
Choia striata was named by Xiao et al. (2005) [Choia? striata]. Its type specimen is NIGPAS-134520, an other (sponge), and it is a compression fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Choia striata Xiao et al. p. 97 figs. 3A-D |
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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.
†Choia striata Xiao et al. 2005
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Xiao et al. 2005 | A possible species of Choia with a poorly defined central disc and abundant, densely packed coronal oxeas. Coronal oxeas large (up to 2.5 mm in maximum width and 50–100 mm in length), speckled with subcircular patches of organic matter. Fine monaxons about 0.07–0.1 mm in diameter are distributed in the central disc area. Coronal oxeas and some fine monaxons bear longitudinal striae.
An incomplete, fan-shaped speci- men about 110240 mm in size. The poorly defined central disc is roughly 30–40 mm in radius. Numerous fine monaxons (0.07–0.1 mm in diameter and about 1–10 mm in length) occur in the central disc, but the central disc is not thatched. Coronal oxeas, 1.0–2.5 mm in maximum width and 50–100 mm in length, taper to pointed ends at both termini. Coronal oxeas are flattened in their middle part where the width is the greatest, and become cylindrical toward tapering termini. Subcircular patches (about 0.1 mm in diameter) of amber-colored organic matter are found on most coronal oxeas, but not in rock matrix. Striae occur in both types of spicules with a consistent spacing of 0.03–0.04 mm, but some spicules have no striae probably because of poor preservation. |
Measurements
No measurements are available
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| Source: g = genus, c = class | |||||
| References: Whittington et al. 1997, Bambach et al. 2007, Kiessling 2004 | |||||
Age range: Meishucunian or 530.70000 to 521.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Meishucunian | China (Anhui) | Choia striata (96370) |