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Rioceratidae
Taxonomy
Rioceratidae was named by Kröger and Evans (2011) [Diagnosis. Slender, orthoconic ellesmerocerids with essentially simple,
straight, transverse sutures, and thin marginal, or nearly so siphuncle;
sutures may form ventral lobe; septal necks achoanitic
through loxochoanitic to nearly orthochoanitic; siphuncular segments
concave, with thick connecting rings; endosiphuncular and cameral
deposits unknown; diaphragms may be present in some forms.].
It was assigned to Ellesmerocerida by Kröger and Evans (2011).
It was assigned to Ellesmerocerida by Kröger and Evans (2011).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Rioceratidae Kröger and Evans |
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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.
Fm. †Rioceratidae Kröger and Evans 2011
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G. †Rioceras Flower 1964
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†Rioceras consuetum Sardeson 1896
†Rioceras dartoni Flower 1964
†Rioceras depressum Flower 1964
†Rioceras escandei Thoral 1935
†Rioceras expansum Flower 1964
†Rioceras fusiforme Flower 1964
†Rioceras lobatum Flower 1964
†Rioceras nondescriptum Flower 1964
†Rioceras tubulare Flower 1964
†Rioceras wellsi Flower 1964
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. Kröger and D. H. Evans 2011 | Diagnosis. Slender, orthoconic ellesmerocerids with essentially simple,
straight, transverse sutures, and thin marginal, or nearly so siphuncle; sutures may form ventral lobe; septal necks achoanitic through loxochoanitic to nearly orthochoanitic; siphuncular segments concave, with thick connecting rings; endosiphuncular and cameral deposits unknown; diaphragms may be present in some forms. |