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Pleurosternon

Reptilia - Pleurosternidae

Synonyms
Synonymy list
YearName and author
1853Pleurosternon Owen p. 1 figs. plates 1-7
1870Digerrhum Cope p. 156
1887Pleurosternum Lydekker and Boulenger pp. 271-272
1889Pleurosternum Lydekker p. 205
1958Pleurosternum Delair p. 47–48
1975Mesochelys Evans and Kemp p. 26
1979Mesochelys Gaffney p. 132 fig. 31
1988Mesochelys Carroll
1988Pleurosternon Carroll
2000Pleurosternon Brinkman et al. p. 272 fig. 5
2004Pleurosternon Milner p. 1445 figs. Text-figs 3–4, 5A, 6, 7A
2007Pleurosternon Joyce
2008Pleurosternon Pérez-García et al.
2009Pleurosternon Anquetin et al.
2011Pleurosternon Lyson and Joyce p. 792
2011Pleurosternon Milner pp. 299-300 fig. 23.3B
2011Pleurosternon Pérez-García and Ortega p. 66
2012Pleurosternon Anquetin p. 28
2012Pleurosternon Karl et al.
2012Pleurosternon Pérez-García
2014Pleurosternon Perea et al.
2015Pleurosternon Pérez-García et al.
2019Pleurosternon Joyce and Anquetin
2020Pleurosternon Guerrero and Pérez-García p. 3
2021Pleurosternon Guerrero and Pérez-García
2021Pleurosternon Pérez-Garcia et al.
2022Pleurosternon Allain et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
RankNameAuthor
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
—Paracryptodira
familyPleurosternidae
genusPleurosternon

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. †Pleurosternon Owen 1853
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Invalid names: Megasternon koenigii Gray 1870 [synonym], Mesochelys durlstonensis Evans and Kemp 1975 [synonym], Pleurosternon concinnum Owen 1853 [synonym], Pleurosternon emarginatum Owen 1853 [synonym], Pleurosternon ovatum Owen 1853 [synonym], Pleurosternon oweni Seeley 1869 [synonym], Pleurosternon sedgwicki Seeley 1869 [synonym], Pleurosternon vansittarti Seeley 1869 [synonym], Pleurosternum portlandicum Lydekker 1889 [synonym]
†Pleurosternon moncayensis Pérez-Garcia et al. 2021
Invalid names: Digerrhum Cope 1870 [synonym], Mesochelys Evans and Kemp 1975 [synonym]
Diagnosis
ReferenceDiagnosis
A. R. Milner 2004Carapace extremely depressed, oval in shape with almost no nuchal emargination in the adult (more pronounced in juveniles). Posterolateral peripheral bones normally not emarginated (emargination in a few specimens may represent healed damage). Eight neurals and two suprapygals, the first suprapygal a slightly elongate rectangle, expanded posteriorly. Neural 8 and suprapygal 1 occasionally replaced by a single element. Pygal indented posteriorly. Costal 1 is an irregular rhomboid, slightly less than twice as long as wide. Outer costal outline oval, roughly matching carapace outline. Costals 6–7 show slight curvature in posterolateral direction. Mesoplastrals present, extending to midline. Xiphiplastrals with a broad V-shaped notch posteriorly. No cervical scute visible dorsally, first marginal scutes meeting in the midline along the anterior half of the nuchal bone. Vertebral scutes about one-third width of carapace with vertebral 1 almost as large as vertebral 2. Pleural scutes barely overlapping peripheral bones with only slight overlap anterolaterally. Carapace and plastron outer surfaces smooth and shiny, mostly covered in regular, clearly defined pitting, with plate margins bearing fine linear striations perpendicular to the margins. Growing to carapace length of 0·56 m (CAMSM J5328).
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: c = class, subp = subphylum, uc = unranked clade
References: Carroll 1988, Hendy et al. 2009

Age range: base of the Late/Upper Tithonian to the top of the Santonian or 150.80000 to 83.60000 Ma

Collections (17 total)


Time interval Ma Country or state Original ID and collection number
Tithonian152.1 - 145.0United Kingdom (England) Pleurosternum portlandicum (127647)
Tithonian152.1 - 145.0France (Nord-Pas-de-Calais) Pleurosternum bullochi (53967)
Tithonian - Berriasian152.1 - 139.8Spain (Soria) P. moncayensis (219479)
Late/Upper Tithonian150.8 - 145.0United Kingdom (England) Pleurosternum portlandicum (119505)
Early/Lower Berriasian - Middle Berriasian145.0 - 140.2United Kingdom (England) P. sp. (28401)
Late/Upper Berriasian145.0 - 140.2United Kingdom (England) Mesochelys durlstonensis (129260)
Middle Berriasian145.0 - 140.2United Kingdom (England) P. bullockii (72142)
Berriasian145.0 - 139.8France (Poitou-Charentes) Pleurosternidae indet. (142093)
Berriasian145.0 - 139.8United Kingdom (England) Platemys bullockii, P. sedgwicki, P. vansittarti, P. oweni, Megasternon koenigii (127482) P. bullocki, P. concinnum, P. emarginatum (127480) P. ovatum, P. emarginatum, Pleurosternum bullocki (127481) Pleurosternum sp. (92916)
Neocomian145.0 - 125.77Spain (Valenciana) P. portlandicum (159585)
Late/Upper Valanginian140.2 - 136.4United Kingdom (England) P. sp. (52258)
Late/Upper Hauterivian136.4 - 130.0United Kingdom (England) P. sp. (119697)
Barremian129.4 - 125.0United Kingdom (England) P. sp. (127533)
Santonian86.3 - 83.6Japan (Hokkaido) P. sp. (94689)