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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]. 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), 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), Guendouz et al. (2022).
Species
Species lacking formal opinion data
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. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 56 | 39.1 | 7.40 | 111.0 | 44.8 | 19.7 | |
| shell diameter | 56 | 82.7 | 13.5 | 301.0 | 87.0 | 54.5 | |
| shell inflation | 56 | 13.9 | 1.50 | 65.0 | 17.9 | 12.4 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: base of the Middle Cenomanian to the top of the Early/Lower Turonian or 100.50000 to 89.80000 Ma
Collections (95 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cenomanian | USA (Utah) | M. geslinianum (5608 5610) | |
| Cenomanian | USA (New Mexico) | M. geslinianum (88813) M. sp., M. whitei, M. mosbyense (230799) | |
| Cenomanian | USA (Texas) | M. crassicostae (4648) M. latoventer (6595) M. swallovii (6641) M. swallovii macrum, M. swallovii (6646) | |
| Cenomanian | USA (Arizona) | M. sp. (3076 3080 3081 3082) | |
| Late/Upper Cenomanian | USA (Texas) | M. geslinianum (167820 175717 177097) M. geslinianum, M. kanabense, M. ornatum (167821) | |
| Late/Upper Cenomanian | France | M. geslinianum (59811) | |
| Late/Upper Cenomanian | Angola | M. gibbosum (175545) | |
| Late/Upper Cenomanian | USA (Colorado) | M. whitei (78164) | |
| Late/Upper Cenomanian | USA (Utah) | M. geslinianum (5609) M. sp. (3289 3321 3324 3325 3326) M. whitei (175427) | |
| Late/Upper Cenomanian | Niger | M. geslinianum (175431) | |
| Late/Upper Cenomanian | Algeria | M. geslinianum (227883 227884) | |
| Late/Upper Cenomanian | USA (Montana) | M. geslinianum (175421) M. mosbyense (167813 168055 168066 168067 175372) M. mosbyense, M. muelleri (167812 168064 168068 168069) M. muelleri (168053) | |
| Late/Upper Cenomanian | Libya | M. geslinianum (208626) | |
| Late/Upper Cenomanian | USA (Wyoming) | M. frontierense (167818 177118) M. mosbyense (175371) M. praecox (167808 167810) M. sp. (233803) M. sp. A (167809) | |
| Late/Upper Cenomanian | Germany (Sachsen) | M. geslinianum (172049 172053 172061 172062 172063 172064) | |
| Late/Upper Cenomanian | Germany | M. geslinianum (9178) | |
| Late/Upper Cenomanian | Kyrgyzstan (Batken) | M. asiaticum (3796) | |
| Late/Upper Cenomanian | USA (New Jersey) | M. bergquisti (167811) | |
| Late/Upper Cenomanian | USA (Arizona) | M. frontierense (167819) M. geslinianum (53401 54145 55435) M. mosbyense (54118 54155 55631) M. sp. (2171 3084) M. whitei (176939) | |
| Late/Upper Cenomanian | Venezuela (Lara) | M. sp. (87993) | |
| Late/Upper Cenomanian | Nigeria | M. sp., M. ornatum (82730) | |
| Late/Upper Cenomanian | Spain | M. geslinianum (186992 186993) M. muelleri (186991) | |
| Late/Upper Cenomanian | Mexico | M. sp., M. whitei (73573) | |
| Late/Upper Cenomanian | United Kingdom (England) | M. geslinianum (4071 4072) | |
| Late/Upper Cenomanian | USA (Minnesota) | M. bergquisti (88011 88015) M. swallovi (1987 1989) Metrioceras swallovi (1990) | |
| Late/Upper Cenomanian | Mexico (Coahuila de Zaragoza) | M. bosei (88675) | |
| Late/Upper Cenomanian | USA (New Mexico) | M. geslinianum (167816 167817 175425) M. geslinianum, M. muelleri (230782) M. mosbyense (44284) M. sp. (177087 230784) | |
| Middle Cenomanian | USA (Texas) | M. latoventer (167815) M. swallovi (167814) | |
| Middle Cenomanian - Late/Upper Cenomanian | Brazil | M. geslinianum (140839) | |
| Cenomanian - Turonian | USA (Texas) | M. geslinianum (234310) | |
| Early/Lower Turonian | Mexico (Coahuila de Zaragoza) | M. sp., M. whitei (88255) | |
| Late/Upper Turonian | Canada (Alberta) | M. sp. (89195) | |
| Middle Turonian - Early/Lower Campanian | USA (Utah) | M. whitei (100218) |