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Metoicoceras
Taxonomy
Metoicoceras was named by Hyatt (1903) [Sepkoski's age data: K Ceno-m K Ceno-u Sepkoski's reference number: 716,901]. Its type is Ammonites swallovi. It is the type genus of Metoicoceratidae.
It was corrected as Metoecoceras by Böse (1923).
It was assigned to Ammonoidea by Böse (1923); to Metoicoceratinae by Cooper (1978); to Ammonoidea by Sepkoski (2002); and to Mammitinae by Chancellor (1982), Kennedy and Cobban (1990), Meister et al. (1992), Wright et al. (1996), Cooper (1998), Barroso-Barcenilla (2004) and Guendouz et al. (2022).
It was corrected as Metoecoceras by Böse (1923).
It was assigned to Ammonoidea by Böse (1923); to Metoicoceratinae by Cooper (1978); to Ammonoidea by Sepkoski (2002); and to Mammitinae by Chancellor (1982), Kennedy and Cobban (1990), Meister et al. (1992), Wright et al. (1996), Cooper (1998), Barroso-Barcenilla (2004) and Guendouz et al. (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1903 | Metoicoceras Hyatt |
| 1923 | Metoecoceras Böse p. 203 |
| 1978 | Metoicoceras Cooper p. 110 |
| 1982 | Metoicoceras Chancellor p. 83 |
| 1990 | Metoicoceras Kennedy and Cobban p. 404 |
| 1992 | Metoicoceras Meister et al. p. 66 |
| 1996 | Metoicoceras Wright et al. pp. 171 - |
| 1998 | Metoicoceras Cooper |
| 2002 | Metoicoceras Sepkoski |
| 2004 | Metoicoceras Barroso-Barcenilla p. 96 |
| 2022 | Metoicoceras Guendouz et al. p. 2167 |
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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.
G. †Metoicoceras Hyatt 1903
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†Metoicoceras bergquisti Cobban 1983
†Metoicoceras crassicostae Stephenson 1952
†Metoicoceras geslinianum d'Orbigny 1841
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†Metoicoceras whitei praecox Haas 1949
Invalid names: Mammites gourdoni de Grossouvre 1912 [synonym], Metoicoceras bosei Jones 1938 [synonym], Metoicoceras frontierense Cobban 1988 [synonym], Metoicoceras kanabense Hyatt 1903 [synonym], Metoicoceras whitei Hyatt 1903 [synonym]
†Metoicoceras gibbosum Hyatt 1903
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Invalid names: Barroisiceras trinodosum Moreman 1927 [synonym], Metoicoceras ornatum Moreman 1942 [synonym]
†Metoicoceras latoventer Stephenson 1953
†Metoicoceras muelleri Cobban 1953
†Metoicoceras praecox Haas 1949
†Metoicoceras swallovi Shumard 1859
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. W. Wright et al. 1996 | Venter on phagmocone flat, on body chamber generally rounded; ribs straight to slightly flexuous, tending to become flat on outer part of sides; inner and outer ventrolateral tubercles present, former weakening and disappearing before end of phragmocone. Macroconchs tending to be more involute and feebly ornamented and microconchs more evolute and strongly ornamented. Differs from its presumed ancestor Plesiocanthoceras mainly in its simpler suture, pseudoceratitic in some, and absence of row of siphonal tubercles (except on early whorls of earliest species). Includes smooth or ribbed, compressed, involute forms and coarsely ornamented, evolute forms. |