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Meginoceras
Taxonomy
Meginoceras was named by McLearn (1930) [Sepkoski's age data: Tr Ladi-u Sepkoski's reference number: 302]. Its type is Steinmannites (Meginoceras) meginae.
It was reranked as Steinmannites (Meginoceras) by McLearn (1930).
It was assigned to Steinmannites by McLearn (1930); to Arpaditinae by Tozer (1981), Tozer (1994) and Gómez-Luna et al. (1998); and to Ceratitida by Sepkoski (2002).
It was reranked as Steinmannites (Meginoceras) by McLearn (1930).
It was assigned to Steinmannites by McLearn (1930); to Arpaditinae by Tozer (1981), Tozer (1994) and Gómez-Luna et al. (1998); and to Ceratitida by Sepkoski (2002).
Species
Synonymy list
Year | Name and author |
---|---|
1930 | Meginoceras McLearn |
1930 | Steinmannites (Meginoceras) McLearn |
1981 | Meginoceras Tozer p. 95 |
1994 | Meginoceras Tozer p. 147 |
1998 | Meginoceras Gómez-Luna et al. |
2002 | Meginoceras Sepkoski |
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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. †Meginoceras McLearn 1930
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†Meginoceras aylardi McLearn 1947
†Meginoceras caurinum McLearn 1947
†Meginoceras effervescens Tozer 1994
†Meginoceras meginae McLearn 1930
†Meginoceras tetsa McLearn 1947
†Meginoceras triviale Tozer 1994
Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
---|---|---|---|---|---|---|---|
shell height | 15 | 16.4 | 12.9 | 20.2 | 16.0 | 2.70 | |
shell diameter | 15 | 33.6 | 22.0 | 44.0 | 36.5 | 7.81 | |
shell inflation | 15 | 8.96 | 7.80 | 10.0 | 9.40 | 0.987 |
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Source: o = order, c = class | |||||
References: Kiessling 2004, Kiessling 2003 |
Age range: Ladinian or 242.00000 to 237.00000 Ma
Collections (29 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Ladinian | Mexico (Zacatecas) | M. sp. (216482) | |
Ladinian | USA (Alaska) | M. sp. (112532) | |
Ladinian | India (Himachal Pradesh) | M. sp. (44732) | |
Longobardian | Canada (British Columbia) | M. aylardi (57093 137174 139109) M. effervescens (138618) M. meginae (43791 137017 137019 137020 137513 137514 138619 138620 138622 138623 139108) M. tetsa (137089 137665 139102 141744) M. tetsa, M. aylardi (137088) M. triviale (137668 137947 138635 139111 141644) Paratrachyceras caurinum (43792) |