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Amygdalocystites radiatus
Taxonomy
Amygdalocystites radiatus was named by Billings (1854). Its type specimen is G.S.C. 1394 and is a 3D body fossil.
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1854 | Amygdalocystites radiatus Billings p. 271 figs. 7, 8 |
| 1946 | Amygdalocystites radiatus Wilson pp. 10 - 11 figs. Plate I, figures 3, 4 |
| 1950 | Billingsocystis invaginata Bassler pp. 274 - 275 fig. 17 |
| 1975 | Amygdalocystites radiatus Parsley and Mintz pp. 51 - 52 figs. PI. 5, fig. 7 |
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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.
†Amygdalocystites radiatus Billings 1854
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Invalid names: Amygdalocystites invaginata Bassler 1950 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Billings 1854 | Body oval, plates somewhat convex, and ornamented with strong ridiges which radiate from the centres to the angles; mouth ambulacral; orifice and arms unknown; column round, smooth, composed of thin joints.
The spaces between the large radiating ridges are fiat and covered with small tubercules, which disappear when the plates are a little worn. Of this fine and very distinct species, enough has not yet been found to show conclusively that it belongs to the present genus. The plates however are solid, or not poriferous, and the shape of the bodry and column is so much like the other species, in general aspect, that I have referred it to this genu for the present." | |
| R. S. Bassler 1950 (Billingsocystis invaginata) | Theca oblong, moderately flattened laterally, base invaginated, with the column attached to its central part. Height 27 mm, greatest width 25 mm, least width 22 mm, depth of invagination about 2 mm. Anal area nearly 3 mm in diameter, with its center about 6 mm below the level of the top of the theca. Theca consisting of approximately 175 plates; 8 or 9 of these occur in a distance equaling the height of the theca. Ornamenting ridges radiating from raised centers of the plates toward their angles are narrowly angular, have sharp crests, and enclose intermediate flat triangular areas. | |
| R. L. Parsley and L. W. Mintz 1975 | Plates with non-expanding rays extending from reduced central boss to plate corners; inter-ray areas pustulose; central boss only slightly elevated. |