Leptocleididae

Leptocleididae
Temporal range: Early Cretaceous, Berriasian–Albian
Leptocleidus
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Superorder:†Sauropterygia
Order:†Plesiosauria
Clade:†Leptocleidia
Family:†Leptocleididae
White, 1940
Subgroups

See text.

Leptocleididae is a family of small-sized plesiosaurs that lived during the Early Cretaceous period (early Berriasian to early Albian stage).[1] Leptocleidus and Umoonasaurus had round bodies and triangle-shaped heads. Hilary F. Ketchum and Roger B. J. Benson (2010), transferred Brancasaurus, Kaiwhekea, Nichollssaura and Thililua to this family.[2] However, Ketchum and Benson (2011) reassigned Kaiwhekea and Thililua to their original positions, as an elasmosaurid and a polycotylid, respectively.[1]

Phylogeny

Leptocleididae

 

Kaiwhekea

 
 

 

 

Nichollssaura

 
 

Thililua

 
 
 

 

Brancasaurus

 
 

 

Umoonasaurus

 
Leptocleidus

 

L. capensis

 
 

L. superstes

 
 
 
 
 
 

Cladogram based on Ketchum and Benson (2011):[1]

Leptocleididae

 

Nichollssaura

 
 

 

Brancasaurus

 
 

 

Umoonasaurus

 
Leptocleidus

 

L. capensis

 
 

L. superstes

 
 
 
 
 

References

  1. 1 2 3 Hilary F. Ketchum and Roger B. J. Benson (2011). "A new pliosaurid (Sauropterygia, Plesiosauria) from the Oxford Clay Formation (Middle Jurassic, Callovian) of England: evidence for a gracile, longirostrine grade of Early-Middle Jurassic pliosaurids". Special Papers in Palaeontology. 86: 109–129. doi:10.1111/j.1475-4983.2011.01083.x.
  2. ↑ Ketchum, H. F.; Benson, R. B. J. (2010). "Global interrelationships of Plesiosauria (Reptilia, Sauropterygia) and the pivotal role of taxon sampling in determining the outcome of phylogenetic analyses". Biological Reviews. 85: 361–392. doi:10.1111/j.1469-185X.2009.00107.x. PMID 20002391.


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