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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Crassatella (Crassatella) duplex
Taxonomy
Crassatella (Crassatella) parisiensis duplex was named by Berezovsky (2004) [= Crassatella distincta Deshayes: Klushnikov, 1958, p. 81, pl. 6, figs. 3 and 3a (non fig. 2).].
It was recombined as Crassatella (Crassatella) duplex by Berezovsky (2018).
It was recombined as Crassatella (Crassatella) duplex by Berezovsky (2018).
Sister species lacking formal opinion data
C. aequalis, C. africana, C. aperta, C. bellovacensis, C. boncevi, C. bosqueti, C. brandmayri, C. carcaensis, C. carcarensis, C. carcarensis, C. carolinana, C. chaillolensis, C. chatfieldensis, C. chilena, C. ciplyensis, C. compressirostrea, C. conradi, C. dainellii, C. deformis, C. depressa, C. desensis, C. deshayesiana, C. dilatata, C. distincta, C. djakovi, C. eutawacolens, C. evansi, C. exalta, C. excelsa, C. faxensis, C. foveolata, C. franzeseii, C. fruscogorensis, C. gabbi, C. gigantea, C. grignonensis, C. groenwalli, C. haskoviensis, C. hemileia, C. incurva, C. inglisia, C. inquirenda, C. ioannes, C. jousseaumi, C. kaiseri, C. kokeni, C. krachi, C. krumbecki, C. littoralis, C. maruejoli, C. montensis, C. negreetensis, C. neusensis, C. newkirkensis, C. nilotica, C. normaniana, C. obliquata, C. oblongata, C. ocordia, C. parva, C. pauxilla, C. pirovanoi, C. planiuscula, C. pleshakovi, C. plicata, C. porcus, C. protracta, C. protracta, C. pugetensis, C. pyrenaica, C. quaasii, C. quinlanensis, C. radiatus, C. regularis, C. rhombea, C. roodensis, C. rossii, C. sanchezi, C. schaurothi, C. schoonoverae, C. seccoi, C. semilaevis, C. sforzai, C. sinuosa, C. slavonica, C. sowerbyi, C. subgibbosula, C. subsulcata, C. tenuistriata, C. tenuisulcata, C. thallavignesi, C. transversus, C. trapoquara, C. trigonata, C. trigonula, C. tumidum, C. ustjurtensis, C. uvasana, C. uvasana, C. vadosa bexarensis, C. vadosa cedarensis, C. vadosa chatfieldensis, C. vadosa manorensis, C. wasana, C. washingtonensis, C. wemmelensis, C. wilcoxi, C. yabei, C. gibbosula, C. fuschsi, C. gigantica, C. imitatoris, C. jamaicensis, C. manifesta, C. negreetensis, C. personata, C. remissacosta, C. subrotunda, C. oblongata, C. pauxilla, C. ustjurtensis, C. tenuicostata
Entered
by P. Wagner on 2026-06-16; modified by P. Wagner on 2026-06-16
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Crassatella (Crassatella) parisiensis duplex Berezovsky p. 44 figs. 6-7 |
| 2018 | Crassatella (Crassatella) duplex Berezovsky pp. 1230 - 1234 figs. Plate 2, figs. 2 and 3; Plate 3, figs. 1-5 |
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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.
†Crassatella (Crassatella) duplex Berezovsky 2004
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. A. Berezovsky 2018 | Part of central field near posterior bend with densely spaced and thin lamellar ribs. Remaining surface of central field with thin and densely spaced rugose ribs. Posterior field covered with densely spaced, lamellar concentric ribs. In addition posterior field having two distinct radial ribs (one of them central). Valves having distinct microorna-mentation (very densely spaced and narrow concentric striae and more widely spaced thin radial bars) confined in adults to their upper half. |
Measurements
No measurements are available
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| Source: f = family, superf = superfamily | |||||
| References: Sanchez Roig 1926, Eames 1951 | |||||
Age range: Priabonian or 37.71000 to 33.90000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Priabonian | Ukraine (Dnipropetrovsk) | Crassatella duplex (77068) |