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Lambdoceras
Taxonomy
Lambdoceras was named by Stirton (1967). Its type is Lambdoceras hessei.
It was synonymized subjectively with Prosynthetoceras by Patton (1969), Patton and Taylor (1971), Patton and Taylor (1973).
It was assigned to Protoceratidae by Stirton (1967), Tedford et al. (1987), Albright (1999); and to Synthetoceratini by Webb (1981), Prothero (1998), Webb et al. (2003), Prothero and Ludtke (2007).
It was synonymized subjectively with Prosynthetoceras by Patton (1969), Patton and Taylor (1971), Patton and Taylor (1973).
It was assigned to Protoceratidae by Stirton (1967), Tedford et al. (1987), Albright (1999); and to Synthetoceratini by Webb (1981), Prothero (1998), Webb et al. (2003), Prothero and Ludtke (2007).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1967 | Lambdoceras Stirton pp. 4-5 |
| 1981 | Lambdoceras Webb p. 362 |
| 1987 | Lambdoceras Tedford et al. |
| 1998 | Lambdoceras Prothero p. 435 |
| 1999 | Lambdoceras Albright |
| 2003 | Lambdoceras Webb et al. p. 362 |
| 2007 | Lambdoceras Prothero and Ludtke p. 174 |
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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. †Lambdoceras Stirton 1967
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†Lambdoceras hessei Stirton 1967
†Lambdoceras siouxensis Frick 1937
†Lambdoceras trinitiensis Patton and Taylor 1971
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Lillegraven 1979, Carroll 1988, Nowak 1999, Prothero 1998 | |||||
Age range: base of the Hemingfordian to the top of the Early/Lower Barstovian or 18.50000 to 12.50000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Miocene | USA (Texas) | Prosynthetoceras trinitiensis (18634) | |
| Hemingfordian | USA (Nebraska) | L. sp. (17952) | |
| Hemingfordian | USA (South Dakota) | L. hessei (17912) | |
| Early/Lower Barstovian | USA (Nebraska) | Neotragocerus improvisus (17983) Prosynthetoceras siouxensis (17905 17976 17985 18011 18019) | |
| Early/Lower Barstovian | USA (Texas) | Prosynthetoceras trinitiensis (18665) |