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Sandownidae

Osteichthyes - Testudines - Sandownidae

Taxonomy
Sandownidae was named by Tong and Meylan (2013). Its type is Sandownia.

It was assigned to Eucryptodira by Tong and Meylan (2013), Danilov et al. (2014).

Subtaxa
Angolachelys, Brachyopsemys, Leyvachelys, Sandownia (type genus)
Entered
by R. Benson on 2012-10-09; modified by R. Benson on 2013-10-27

Synonymy list
YearName and author
2013Sandownidae Tong and Meylan p. 188
2014Sandownidae Danilov et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
RankNameAuthor
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—ArchelosauriaCrawford 2015
—Pantestudines
—Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
—Eucryptodira
familySandownidae
familySandownidae

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. †Sandownidae Tong and Meylan 2013
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G. †Angolachelys Mateus et al. 2009
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†Angolachelys mbaxi Mateus et al. 2009
G. †Brachyopsemys Tong and Meylan 2013
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†Brachyopsemys tingitana Tong and Meylan 2013
G. †Leyvachelys Cadena 2015
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†Leyvachelys cipadi Cadena 2015
G. †Sandownia Meylan et al. 2000
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†Sandownia harrisi Meylan et al. 2000
Diagnosis
ReferenceDiagnosis
H. Tong and P. Meylan 2013Centrocryptodiran turtles (otic trochlea present and internal carotid artery located deep within pterygoid) with the jugal making a significant contribution to the triturating surface; pterygoids partly or completely cover basisphenoid; premaxillae partly or completely fused and slightly protuberant anteriorly; prefrontal L-shaped, with a posteriolateral process along the ventral margin of the orbit; external process of the pterygoid absent and occipital condyle with anterior location in between the articular surfaces of the quadrate. Long symphysis of dentary; broad triangular lower triturating surface that slopes ventrally from the coronoid process and lacks labial and lingual ridges (known in Sandownia harrisi and the taxon described below).
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: freshwatersubo
Locomotion: actively mobilec
Life habit: aquaticsubo
Diet: omnivoresubo
Reproduction: oviparoussubo
Created: 2005-08-26 14:49:00
Modified: 2005-08-26 16:49:00
Source: subo = suborder, c = class, subp = subphylum
References: Kiessling 2004, Uetz 2005, Hendy et al. 2009, Carroll 1988

Age range: base of the Early/Lower Aptian to the top of the Danian or 121.40000 to 61.66000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Barremian - Early/Lower Aptian125.77 - 119.57Colombia (Boyaca) Leyvachelys cipadi (176544)
Early/Lower Aptian121.4 - 119.57United Kingdom (England) Sandownia harrisi (77953)
Early/Lower Albian113.2 - 110.1USA (Texas) Eucryptodira indet. (27774) Leyvachelys cipadi (31172 180948 180949)
Coniacian89.8 - 85.7Angola (Bengo) Angolachelys mbaxi (275490)
Danian66.0 - 61.66Morocco Brachyopsemys tingitana (83311)