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Leptocleididae
Taxonomy
Leptocleididae was named by White (1940).
It was assigned to Plesiosauria by White (1940); to Plesiosauria by Kuhn (1946); to Pliosauroidea by Kuhn (1966); and to Leptocleidia by Ketchum and Benson (2010), Ketchum and Benson (2011) and Benson and Druckenmiller (2014).
It was assigned to Plesiosauria by White (1940); to Plesiosauria by Kuhn (1946); to Pliosauroidea by Kuhn (1966); and to Leptocleidia by Ketchum and Benson (2010), Ketchum and Benson (2011) and Benson and Druckenmiller (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1940 | Leptocleididae White p. 463 figs. 10b-d |
| 1946 | Leptoclididae Kuhn p. 59 |
| 1966 | Leptocleididae Kuhn p. 115 |
| 2010 | Leptocleididae Ketchum and Benson p. 15 |
| 2011 | Leptocleididae Ketchum and Benson p. 126 |
| 2014 | Leptocleididae Benson and Druckenmiller figs. 2-3 |
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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.
Fm. †Leptocleididae White 1940
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G. †Leptocleidus Andrews 1922
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†Leptocleidus capensis Andrews 1911
†Leptocleidus clemai Cruickshank and Long 1997
†Leptocleidus superstes Andrews 1922
Invalid names: Peyerus Stromer 1935 [synonym]
G. †Nichollssaura Druckenmiller and Russell 2009
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†Nichollssaura borealis Druckenmiller and Russell 2009
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Invalid names: Nichollsia borealis Druckenmiller and Russell 2008 [replaced]
Invalid names: Nichollsia Druckenmiller and Russell 2008 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. E. White 1940 | "Only skull known (Rhomaleosaurus) shows beginning of dolichocephaly; 18+ to 27 cervical vertebrae, 27 to 31 dorsals, 34 caudals; cervical ribs single- or doubleheaded; clavicles and interclavicle present; interclavicle without posterior process, posterior edge may be free and with a broad notch; scapula not meeting coracoid medial to scapulo-coracoid fenestra; posterolateral angles of coracoids not produced." |
Measurements
No measurements are available
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| Reference: Kiessling 2004 | |||||
Age range: base of the Late/Upper Berriasian to the top of the Albian or 145.00000 to 100.50000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Jurassic - Early/Lower Cretaceous | Australia (Queensland) | Leptocleidus sp. (99161) | |
| Late/Upper Tithonian - Early/Lower Berriasian | United Kingdom (England) | Leptocleididae indet. (122657) | |
| Late/Upper Berriasian | Germany (Nordrhein-Westfalen) | Brancasaurus brancai, Plesiosaurus valdensis (45760) | |
| Berriasian | Australia (Western Australia) | Leptocleidus sp. (110534) | |
| Early/Lower Valanginian | United Kingdom (England) | Cimoliasaurus valdensis (52577 52649 127530) Cimoliosaurus valdensis (127529) Plesiosaurus sp. (91990) | |
| Late/Upper Valanginian | South Africa (Eastern Cape) | Plesiosaurus sp. (117446) | |
| Hauterivian - Barremian | Australia (Western Australia) | Leptocleidus sp., Leptocleidus clemai (55309) | |
| Late/Upper Barremian | United Kingdom (England) | Vectocleidus pastorum (137200) | |
| Barremian | United Kingdom (England) | Leptocleidus superstes (117445) | |
| Aptian - Albian | Australia (South Australia) | Leptocleidus sp., Umoonasaurus demoscyllus (102987) Umoonasaurus demoscyllus (103082 103084) Woolungasaurus glendowerensis (103085) | |
| Albian | Canada (Alberta) | Nichollsia borealis (87105) |