Artículo
Bone histology supports gregarious behavior and an early ontogenetic stage to Decuriasuchus quartacolonia (Pseudosuchia: Loricata) from the Middle‐Late Triassic of Brazil
Macedo de Farias, Brodsky Dantas; Desojo, Julia Brenda
; Cerda, Ignacio Alejandro
; Ribeiro, Ana Maria; Ferigolo, Jorge; Carlisbino, Thiago; Schultz, Cesar Leandro; Mastrantonio, Bianca Martins; Soares, Marina Bento


Fecha de publicación:
12/2023
Editorial:
Wiley-liss, div John Wiley & Sons Inc.
Revista:
Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology
ISSN:
1932-8486
e-ISSN:
1932-8494
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Decuriasuchus quartacolonia is a middle-sized basal “rauisuchian” (Pseudosuchia, Loricata) from the Triassic beds of Brazil, whose original description was based on 10 specimens of equivalent size found in aggregation. In this contribution, we explore the osteohistology of its appendicular bones and a rib, aiming to infer growth patterns and ontogeny. In all analyzed bones (except in the rib) from three individuals, we found fibrolamellar bone (FLB) throughout the cortices, a pattern shared with other histologically sampled basal loricatans. We found evidence that suggests an early ontogenetic stage for all studied specimens: absence of secondary osteons, lack of transition from an inner highly vascularized FLB matrix to a poor vascularized parallel-fibred bone, one line of arrested growth, open vascular canals in the external surface of the cortex and absence of an external fundamental system. In addition, we observed that the neurocentral sutures in the caudal to cervical vertebrae of the holotype are unfused, strongly suggesting that these individuals were not skeletally mature, as had been previously assumed. In addition, our data support the prior hypothesis that Decuriasuchus is the oldest-known archosaur to show evidence of gregarious behavior and adds a probable cause of this as a strategy to obtain food and avoid predation until becoming independent as adults. Furthermore, our results open the possibility that Decuriasuchus may represent an earlier growth stage of the larger Prestosuchus chiniquensis, with two specimens recovered from the same stratigraphic level and paleontological site.
Palabras clave:
Gregarism
,
Middle Triassic
,
Ontogeny
,
Paleohistology
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IIPG)
Articulos de INSTITUTO DE INVESTIGACION EN PALEOBIOLOGIA Y GEOLOGIA
Articulos de INSTITUTO DE INVESTIGACION EN PALEOBIOLOGIA Y GEOLOGIA
Citación
Macedo de Farias, Brodsky Dantas; Desojo, Julia Brenda; Cerda, Ignacio Alejandro; Ribeiro, Ana Maria; Ferigolo, Jorge; et al.; Bone histology supports gregarious behavior and an early ontogenetic stage to Decuriasuchus quartacolonia (Pseudosuchia: Loricata) from the Middle‐Late Triassic of Brazil; Wiley-liss, div John Wiley & Sons Inc.; Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology; 307; 4; 12-2023; 957-973
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