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Retusa (Cylichnina)
Taxonomy
Cylichnina was named by Monterasato (1884) [Sepkoski's age data: T Than R]. It is extant.
It was reranked as Retusa (Cylichnina) by Martin (1904), Glibert (1962), Palmer and Brann (1966) and Mandic and Steininger (2003).
It was assigned to Scaphanderidae by Turner (1938); to Scaphandridae by Durham (1944) and Harris and Palmer (1947); to Cylichnidae by Squires (1984), Squires (1987), Squires (1988), Squires and Demetrion (1992) and Squires (1999); to Cephalaspida by Sepkoski (2002); to Retusidae by Todd (2001) and Harzhauser and Kowalke (2002); and to Retusa by Martin (1904), Glibert (1962), Palmer and Brann (1966) and Mandic and Steininger (2003).
It was reranked as Retusa (Cylichnina) by Martin (1904), Glibert (1962), Palmer and Brann (1966) and Mandic and Steininger (2003).
It was assigned to Scaphanderidae by Turner (1938); to Scaphandridae by Durham (1944) and Harris and Palmer (1947); to Cylichnidae by Squires (1984), Squires (1987), Squires (1988), Squires and Demetrion (1992) and Squires (1999); to Cephalaspida by Sepkoski (2002); to Retusidae by Todd (2001) and Harzhauser and Kowalke (2002); and to Retusa by Martin (1904), Glibert (1962), Palmer and Brann (1966) and Mandic and Steininger (2003).
Subtaxa
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Cylichnina Monterasato |
| 1904 | Retusa (Cylichnina) Martin p. 135 |
| 1938 | Cylichnina Turner p. 67 |
| 1944 | Cylichnina Durham p. 190 |
| 1947 | Cylichnina Harris and Palmer p. 450 |
| 1962 | Retusa (Cylichnina) Glibert p. 57 |
| 1966 | Retusa (Cylichnina) Palmer and Brann p. 878 |
| 1984 | Cylichnina Squires p. 39 |
| 1987 | Cylichnina Squires p. 53 |
| 1988 | Cylichnina Squires p. 17 |
| 1992 | Cylichnina Squires and Demetrion p. 34 |
| 1999 | Cylichnina Squires p. 22 |
| 2001 | Cylichnina Todd |
| 2002 | Cylichnina Harzhauser and Kowalke p. 74 |
| 2002 | Cylichnina Sepkoski |
| 2003 | Retusa (Cylichnina) Mandic and Steininger p. 274 |
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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.
Subg. Retusa (Cylichnina) Monterasato 1884
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†Cylichnina coelata Deshayes 1862
†Cylichnina petrosa Conrad 1848
†Cylichnina tantilla Anderson and Hanna 1925
†Cylichnina turneri Effinger 1938
†Retusa (Cylichnina) aequiattenuata Eames 1952
†Retusa (Cylichnina) conutus Deshayes 1824
†Retusa (Cylichnina) marylandica Martin 1904
†Retusa (Cylichnina) subspissa Conrad 1848
Diagnosis
No diagnoses are available