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Cyclocardia mesembria
Taxonomy
Cyclocardia mesembria was named by Stilwell and Zinsmeister (1992) [DISTRIBUTION: Eocene; Seymour Island, Antarctica.]. Its type specimen is USNM 441626, a shell, and it is not a trace fossil.
Sister species lacking formal opinion data
Cardita ezoensis, Cardita nuwokensis, Cardita steinekei, Cardita subcrassidens, Cardita subnipponica, C. amaninensis, C. antiqua, C. astartoides, C. awamoensis, C. belogolovensis, C. beringiana, C. compressum, C. denudata, C. elliptica, C. eoensis, C. erimoensis, C. expansa, C. ezoensis, C. ferrugianea, C. ferruginea, C. fujinaensis, C. gackhensis, C. gamali, C. grossecostata, C. hamiltonensis, C. ilpinensis, C. isaotakii, C. kickxi, C. kieli, C. kovatschensis, C. laxata, C. longini, C. lutosa, C. magica, C. myogadaniensis, C. nairoensis, C. ochotica, C. omaliana, C. orbica, C. orbicularis, C. orientalis, C. ottonis, C. ovata, C. ovraensis, C. penzhensis, C. pilvoensis, C. pliocenica, C. pornaiensis, C. poronaiensis, C. posneri, C. praeruptensis, C. rafensis, C. rjabininae, C. roundiformis, C. sakamotoi, C. scalaris, C. siogamensis, C. subnipponica, C. takedai, C. tokudai, C. tuberculata, C. tumiensis, C. veniaminovi, C. wajampolkensis, C. yakatagensis, C. hindmarshensis, C. peridonea, C. depressa, C. grossecostata, C. grossecostata, C. kickxi, C. orbicularis, C. scalaris, C. subcompacta, Venericardia nortensis, Venericardia vestitoides, Venericaridia chirstiei
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Cyclocardia mesembria Stilwell and Zinsmeister p. 69 figs. pl. 69, figs. q, r |
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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.
†Cyclocardia mesembria Stilwell and Zinsmeister 1992
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, superf = superfamily | |||||
| References: Todd 2001, Sanchez Roig 1926 | |||||
Age range: base of the Ypresian to the top of the Late/Upper Eocene or 56.00000 to 33.90000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ypresian - Lutetian | Antarctica | Cyclocardia mesembria (72405) | |
| Bartonian | Antarctica (Seymour Island) | Cyclocardia mesembria (63552) | |
| Late/Upper Eocene | Antarctica | Cyclocardia mesembria (72397) |