ANATOMIA ÓSSEA E MUSCULAR DO CÍNGULO ESCAPULAR E BRAÇO DE Tapirus terrestris (PERISSODACTYLA: TAPIRIDAE)

Pereira, Saulo Gonçalves; Santos, André Luíz Quagliatto; Borges, Daniela Cristina Silva; Souza, Rodrigo de; Quaioz, Priscilla Rosa

doi:10.1590/1089-6891v16i228130

Cited by 4 publications

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References 10 publications

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“…Tapirus terrestris has bone and muscle characteristics of an animal adapted to moving or running and any eventual swimming with protuberant bones (PEREIRA et al, 2015). The forearm and hand muscles are divided into two groups, the extensors and lexors (Figures 6 and 7).…”

Section: The Presence Of Four Ingers Is What Makes Thismentioning

confidence: 99%

Bone and muscular anatomy of the forearm and hand in Tapirus terrestris (Perissodactyla, Tapiridae)

et al. 2017

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ResumoAnatomia óssea e muscular do antebraço e mão de Tapirus terrestris (Perissodactyla, Tapiridae). Existem duas espécies de anta brasileira, os maiores mamíferos terrestres do Brasil, as quais pertencem à ordem dos Perissodactyla, assim como os equinos. Objetivou-se descrever a anatomia óssea e muscular do antebraço e mão de Tapirus terrestris e fazer considerações adaptativas. Foram utilizadas cinco peças anatômicas doadas por um criadouro ao Laboratório de Ensino e Pesquisa em Animais Silvestres da Universidade Federal de Uberlândia (LAPAS-UFU), após óbito sem traumas. Os ossos foram analisados, os músculos dissecados, e ambos descritos. Os ossos que constituem o esqueleto do antebraço e mão da anta são a ulna, rádio, metacarpos, carpos, falanges e sesamoides. Os músculos são: M. extensor carpo radial, M. ulnar lateral, M. lexor carpo radial, M. extensor radial comum, M. extensor longo dos dedos II, III, IV e V, M. extensor digital lateral, M. abdutor longo, M. lexor digital supericial, M. lexor digital profundo, M. lexor carpo ulnar, M. lexor oblíquo do carpo, M. interósseos e M. lumbricais. Os acidentes ósseos e a estrutura muscular estão adaptados para o desenvolvimento do nicho do animal.Palavras-chave: Anta; Morfologia; Músculos; Osteologia AbstractIn Brazil, there are two species of tapirs, the largest land mammals in Brazil, which belong to the order Perissodactyla, as do horses. Our aim was to describe the bone and muscular anatomy of the forearm and hand in T. terrestris and to propose adaptive functions. We used ive anatomical specimens donated from a breeder to the Laboratory for Teaching and Research on Wild Animals of the Federal University of Uberlandia after death with no trauma. The bones were analyzed, the muscles dissected, and both described. The bones of the forearm and hand of the tapir are the ulna, radius, Os. metacarpalia, Os. carpi, phalanx and Os. sesamoideum.

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Section: The Presence Of Four Ingers Is What Makes Thismentioning

confidence: 99%

Bone and muscular anatomy of the forearm and hand in Tapirus terrestris (Perissodactyla, Tapiridae)

et al. 2017

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Looking back over the shoulder: New insights on the unique scapular anatomy of the tapir (Perissodactyla: Tapiridae)

MacLaren

2023

The Anatomical Record

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The musculoskeletal anatomy of the shoulder of many ungulates has been inferred from veterinary model taxa, with uniformity in muscle arrangements and attachment sites often assumed. In this study, I investigated the muscular and osteological anatomy of tapirs and their relatives (Perissodactyla: Tapiroidea), using a combination of gross dissection and digital imaging (photography and laser surface scanning). Dissections of three modern tapir species revealed that the m. infraspinatus originates from both supraspinous and infraspinous fossae for all species, lying on both sides of the distal scapular spine. The epimysial border between the m. supraspinatus and m. infraspinatus origin sites are marked in all species by an ossified ridge, sometimes extending the length of the scapular spine. This “supraspinous ridge” is clearly visible on the scapular surface of both modern and extinct Tapirus scapulae; however, the ridge does not appear present in any non‐Tapirus tapiroids examined (e.g., Helaletes, Nexuotapirus), nor in other perissodactyls or artiodactyls. Moreover, the ridge exhibits a clearly distinct morphology in Tapirus indicus compared to all other Tapirus species examined. Combined, these findings indicate that the presence and position of the “supraspinous ridge” may represent a robust phylogenetic character for reconstructing relationships within tapiroids. Unfortunately, any functional locomotor outcomes or benefits of the m. infraspinatus straddling the scapular spine remains elusive. This study represents a firm reminder for anatomists, veterinarians, and paleontologists to (where possible) look beyond veterinary model systems when inferring musculoskeletal form or function in non‐model organisms.

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The youngest Tapir from a Quaternary deposit of the Americas

Chahud

Okumura

2020

Historical Biology

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ANATOMIA ÓSSEA E MUSCULAR DO CÍNGULO ESCAPULAR E BRAÇO DE Tapirus terrestris (PERISSODACTYLA: TAPIRIDAE)

Cited by 4 publications

References 10 publications

Bone and muscular anatomy of the forearm and hand in Tapirus terrestris (Perissodactyla, Tapiridae)

Bone and muscular anatomy of the forearm and hand in Tapirus terrestris (Perissodactyla, Tapiridae)

Looking back over the shoulder: New insights on the unique scapular anatomy of the tapir (Perissodactyla: Tapiridae)

The youngest Tapir from a Quaternary deposit of the Americas

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