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Stylemys gisellae

Osteichthyes - Testudines - Testudinidae

Discussion

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Taxonomy
Stylemys gisellae was named by Carbot-Chanona et al. (2022). Its type specimen is UMPE 443, a partial shell (an almost complete carapace with a relatively good preservation and a poorly preserved plastron), and it is a 3D body fossil. Its type locality is Santiago Yolomécatl, Iniyoo Local Fauna, which is in a Bartonian/Rupelian fluvial-lacustrine mudstone/chert in the Yolomécatl Formation of Mexico.

Synonymy list
YearName and author
2022Stylemys gisellae Carbot-Chanona 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
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
—Pantestudinoidea
superfamilyTestudinoidea
familyTestudinidaeBatsch 1788
subfamilyTestudininae
genusStylemys
speciesgisellae

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.

†Stylemys gisellae Carbot-Chanona et al. 2022
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Diagnosis
ReferenceDiagnosis
G. Carbot-Chanona et al. 2022aff. ‘Stylemys’ gisellae sp. nov. can be attributed to Testudinidae considering the following character combination: the alternating rectangular and non-rectangular arrangement of neurals; a coincidence between the costo-peripheral suture and the pleuro-marginal sulci; thin medial ends and wide lateral ends of costals, alternating with wide medial ends and thin lateral ends of costals; and pleural 1 not contacting the nuchal bone and wide vertebrals, almost equal to pleurals. aff. ‘Stylemys’ gisellae sp. nov. can be differentiated from other members of Testudinidae based on the following combination of morphological characters (autapomorphic characters marked with an asterisk): big size, about 920 mm; neural formula 4-8-4-8?-6A-6-6-6; marginal 1 overlapping costal 1(*), and sharp-raised ridges sulci as to some species of Chelonoidis.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialf
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Diet 2: herbivoref
Reproduction: oviparousf
Created: 2005-08-26 07:16:55
Modified: 2005-09-09 16:16:46
Source: f = family, c = class, subp = subphylum
References: Ernst and Barbour 1989, Hendy et al. 2009, Carroll 1988

Age range: base of the Bartonian to the top of the Rupelian or 41.03000 to 27.30000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Bartonian - Rupelian41.03 - 27.3Mexico (Oaxaca) Stylemys sp. (type locality: 166797)