Evolution of the Side-Necked Turtles: The Families Bothremydidae, Euraxemydidae, and Araripemydidae

Gaffney, Eugene S.; Tong, Haiyan; Meylan, Peter A.

doi:10.1206/0003-0090(2006)300[1:eotstt]2.0.co;2

Cited by 273 publications

(734 citation statements)

References 69 publications

(258 reference statements)

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“…The nuchal contacts neural 1 posteriorly, costal 1 posterolaterally and peripheral 1 laterally. These features differ from Araripemys, where the first peripherals are greatly reduced and do not contact the nuchal (Meylan, 1996;Gaffney et al, 2006). No evidence of a cervical scale is observed in the Ipubi material, indicating that this element was absent in this taxon as in other Pelomedusoides (Gaffney et al, 2001(Gaffney et al, , 2006.…”

Section: Geological Settingmentioning

confidence: 75%

“…According to Oliveira et al (2009) the following Pelomedusoides were described from the Araripe Basin: Araripemys barretoi Price, 1973, Brasilemys josai Lapparent de Broin, 2000, Cearachelys placidoi Gaffney, Campos & Hirayama, 2001 and Euraxemys essweini Gaffney, Tong & Meylan, 2006. Without presenting any argument, Fielding et al (2005 interpreted CPCA 3560 as cf.…”

Section: Discussionmentioning

confidence: 99%

“…The most important anatomical feature that can be determined is the absence of a cavum pterygoidei, that is also absent in Araripemys, Euraxemys and Cearachelys, contrasting to the condition observed in Brasilemys and other podocnemidids (e.g. Gaffney et al, 2006;Meylan et al, 2009).…”

Section: Geological Settingmentioning

confidence: 94%

“…On the counterpart of the slab of the specimen the impression of some peripheral bones are preserved ( Figure 5). The carapace is uncrushed showing a rather smooth external surface, in contrast to the sculptured condition with marked pits observed in Araripemys barretoi Price, 1973(see Meylan, 1996Gaffney et al, 2006).…”

Section: Geological Settingmentioning

confidence: 97%

“…There are no fontanels in CPCA 3560, which are also absent in Brasilemys, Euraxemys and Cearachelys, in contrast to the condition of Araripemys which has fontanels in the carapace and plastron (Price, 1973;Kischlat & Campos, 1990;Schleich, 1990;Meylan, 1996;Oliveira & Kellner, 2005Gaffney et al, 2006).…”

Section: Geological Settingmentioning

confidence: 99%

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First turtle from the Ipubi Formation (Early Cretaceous), Santana Group, Araripe Basin, Brazil

Oliveira¹,

Saraiva²,

Silva³

et al. 2011

Rev. bras. paleontol.

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Section: Geological Settingmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 94%

Section: Geological Settingmentioning

confidence: 97%

Section: Geological Settingmentioning

confidence: 99%

See 3 more Smart Citations

First turtle from the Ipubi Formation (Early Cretaceous), Santana Group, Araripe Basin, Brazil

Oliveira¹,

Saraiva²,

Silva³

et al. 2011

Rev. bras. paleontol.

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Ontogeny of the Shell Bones of Embryos of Podocnemis unifilis (Troschel, 1848) (Testudines, Podocnemididae)

Lima

Santos

Vieira

et al. 2011

The Anatomical Record

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The aim of the present study was to investigate the sequence of shell bone formation in the embryos of the Pleurodira, Podocnemis unifilis. Their bones and cartilage were collected and cleared before staining. The shell was also examined by obtaining a series of histological slices. All the bony elements of the plastron have independent ossification centers, which subsequently join together and retain two fontanelles until the period of hatching. This turtle has a mesoplastra, which is characteristic of the Podocnemididae. The carapace begins to form concurrently with the ossification of the ribs at the beginning of stage 20. All the plates, except the suprapygal, initiate ossification during the embryonic period. The main purpose of the histological investigation was to highlight the relationship between the formation of the carapace and ribs with that of the neural plates. The costal and neural plates were found not to independent ossification centers, but to be closely related to components of the endoskeleton, originating as expansions of the perichondral collar of the ribs

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Osteohistology and microanatomy of a new specimen of Cearachelys placidoi (Testudines: Pleurodira) a side‐necked turtle from the lower Cretaceous of Brazil

Sena

Bantim

Saraiva

et al. 2020

The Anatomical Record

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Pelomedusoides had a recognised diverse Early Cretaceous fauna of turtles in Northeast Brazil. Within them, the bothremydid Cearachelys placidoi has a relatively abundant record. This diversity contrasts with the scarcity of osteohistological studies in this group. The relatively well-preserved shell of C. placidoi (UFRPE 5600), from the Aptian age of Araripe Basin, is studied here for the purpose of filling this gap. We performed the osteohistological description of the plastron of a new specimen of C. placidoi. Also, to conduct a comparative study, we carried out histological sections in bones of the recent chelid Phrynops sp. Our histological findings indicate similarities between the histological pattern of freshwater turtles and the coastal marine C. placidoi. Moreover, osteohistological features imply metaplastic incorporation of dermal interwoven structural fiber bundles. Lastly, the xiphiplastron of C. placidoi shows an increase of bone compactness over its craniocaudal axis. This microanatomical feature is exclusive to Cearachelys so far.

show abstract

Evolution of the Side-Necked Turtles: The Families Bothremydidae, Euraxemydidae, and Araripemydidae

Cited by 273 publications

References 69 publications

First turtle from the Ipubi Formation (Early Cretaceous), Santana Group, Araripe Basin, Brazil

First turtle from the Ipubi Formation (Early Cretaceous), Santana Group, Araripe Basin, Brazil

Ontogeny of the Shell Bones of Embryos of Podocnemis unifilis (Troschel, 1848) (Testudines, Podocnemididae)

Osteohistology and microanatomy of a new specimen of Cearachelys placidoi (Testudines: Pleurodira) a side‐necked turtle from the lower Cretaceous of Brazil

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