Arthritic lesions and congenital fusion in foot bones of <i>Panochthus</i> sp. (Xenarthra, Cingulata)

A set of lesions are re-described and new pathological findings in foot bones of Panochthus sp. (Xenarthra, Cingulata) are presented. The material reexamined in fact presents enthesiophytes instead of osteoartrithis, as previously interpreted. Furthermore, Calcium Pyrophosphate Deposition Disease (CPPD) was observed, a lesion absent in previous report. CPPD also was found in another set of foot bones and it was associated with a congenital fusion of two sesamoids. The material studied were collected in two natural tank deposits, one in Paraíba (material reexamined) and other in Rio Grande do Norte (new pathological findings) State.

Authorship

FERNANDO HENRIQUE DE S. BARBOSA

Programa de Pós-graduação em Geologia, Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 274, Cidade Universitária, Ilha do Fundão, 21941-916 Rio de Janeiro, RJ, BrazilUniversidade Federal do Rio de JaneiroBrazilRio de Janeiro, RJ, BrazilPrograma de Pós-graduação em Geologia, Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, Av. Athos da Silveira Ramos, 274, Cidade Universitária, Ilha do Fundão, 21941-916 Rio de Janeiro, RJ, Brazil

KLEBERSON DE O. PORPINO

Departamento de Ciências Biológicas, Universidade do Estado do Rio Grande do Norte, Av. Professor Antônio Campos, s/n, Costa e Silva, 59610-090 Mossoró, RN, BrazilUniversidade do Estado do Rio Grande do NorteBrazilMossoró, RN, BrazilDepartamento de Ciências Biológicas, Universidade do Estado do Rio Grande do Norte, Av. Professor Antônio Campos, s/n, Costa e Silva, 59610-090 Mossoró, RN, Brazil

BRUCE M. ROTHSCHILD

Carnegie Museum of Natural History, 4400 Forbes Ave, 44272, Pittsburgh, Pennsylvania, USACarnegie Museum of Natural HistoryUSAPittsburgh, Pennsylvania, USACarnegie Museum of Natural History, 4400 Forbes Ave, 44272, Pittsburgh, Pennsylvania, USA

UIARA G. CABRAL

Setor de Paleovertebrados, Departamento de Geologia e Paleontologia, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão, 20940-040 Rio de Janeiro, RJ, BrazilUniversidade Federal do Rio de JaneiroBrazilRio de Janeiro, RJ, BrazilSetor de Paleovertebrados, Departamento de Geologia e Paleontologia, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, São Cristóvão, 20940-040 Rio de Janeiro, RJ, Brazil

LILIAN P. BERGQVIST

Correspondence to: Fernando Henrique de Souza Barbosa E-mail: fhsbarbosa@gmail.com

*
Contribution to the centenary of the Brazilian Academy of Sciences.

SCIMAGO INSTITUTIONS RANKINGS

Figures

Figures (4)

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Figure 1
Location map of the fossil localities (Lagoa do Santo site, Currais Novos municipality, Rio Grande do Norte State and Campo Alegre site, Taperoá municipality, Paraíba State).

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Figure 2
(a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) left metatarsal III (MN 3631-V) in dorsal view with highlight of the lesion; (c) left metatarsal III (MN 3631-V) in lateral view with highlight of the lesion; (d) proximal articulation of left metatarsal III (MN 3631-V) with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: mt III: metatarsal III.

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Figure 3
(a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) left ectocuneiform (MN 3734-V) in lateral view with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: ec: ectocuneiform.

Thumbnail

Figure 4
(a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) right sesamoids (MCC 1559-V) associated with metatarsal III fused; (c) right mesocuneiform in lateral view with highlight of the lesion; (d) right sesamoid (MCC 1559-V) associated with metatarsal II in lateral view with highlight of the lesion; (e) proximal articulation of the metatarsal IV (MCC 1559-V) with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: mt IV: metatarsal IV.

Figure 1 Location map of the fossil localities (Lagoa do Santo site, Currais Novos municipality, Rio Grande do Norte State and Campo Alegre site, Taperoá municipality, Paraíba State).

Figure 2 (a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) left metatarsal III (MN 3631-V) in dorsal view with highlight of the lesion; (c) left metatarsal III (MN 3631-V) in lateral view with highlight of the lesion; (d) proximal articulation of left metatarsal III (MN 3631-V) with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: mt III: metatarsal III.

Figure 3 (a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) left ectocuneiform (MN 3734-V) in lateral view with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: ec: ectocuneiform.

Figure 4 (a) scheme of the foot of Panochthus sp. (modified from Burmeister, 1874); (b) right sesamoids (MCC 1559-V) associated with metatarsal III fused; (c) right mesocuneiform in lateral view with highlight of the lesion; (d) right sesamoid (MCC 1559-V) associated with metatarsal II in lateral view with highlight of the lesion; (e) proximal articulation of the metatarsal IV (MCC 1559-V) with highlight of the lesion. Scale bar = 2.0 cm. Abbreviation: mt IV: metatarsal IV.

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Arthritic lesions and congenital fusion in foot bones of <i>Panochthus</i> sp. (Xenarthra, Cingulata)

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[1] Correspondence to: Fernando Henrique de Souza Barbosa E-mail: fhsbarbosa@gmail.com