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Arctodus simus: The short-faced bear.

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Skeletal drawing of FMNH PM24880, an old and very large specimen of Arctodus simus.

Update time! (Marsh 2014) I changed the scale guy for a public domain one (I didn't realized the other wasn't) and remade the entire skeletal from scratch, rescaled everything and stuff, I've learned more about the anatomy of bears so I feel good about how the bones articulate now, one of the changes is that the ribcage is deeper now since it was too wide before although the new one is not as deep as my original versions. You might notice that I've added a "mass" there, well, I've come to make frontal and dorsal views, they don't have all the details right now so I'm not going to upload them anytime soon but they are perfectly fine to perform a GDI.

August 2014 update: Removed the scale guy, I prefer a "clean" look and along with other things it made it look busy and I didn't like that. So what's new? I'm still unable to find lateral view images of Arctodus humerus/femur but I found good photos of Ursus ones so the new ones are based on them, modified with Arctodus proportions of course, I also remade the ribcage and the hands and changed the posture. New weight estimated with GDI as before but now I took into account the seasonal changes in body fat of adult male brown bears during the course of the year (18%-32%, Schwartz et al., 2014), numbers are rounded though.

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Recunstruccion de FMNH PM24880, un especimen of Arctodus simus viejo y de gran tamaño

¡Actualizaciones! (Marzo 2014) He cambiado el indiviuo que usaba como escala por uno en el dominio publico (no me habia dado cuenta que el anterior no lo era) y rehice toda la reconstruccion desde cero, re-escale todo y esas cosas, he aprendido mas sobre la anatomía de los osos y me siento bien respecto a como se articulan los huesos ahora, uno de los cambios es que la caja toracica es mas profunda ahora (antes era muy ancha) aunque no tan profunda como mis versiones mas antiguas. Podran notar que he añadido un"masa" ahí, pues, he hecho tambien vistas frontal y dorsal, no tienen todos los detalles así que no planeo subirlas pronto pero estan perfectamente bien para realizar un GDI.

Actualización Agosto 2014: Removi al tipo escala, prefiero un aspecto "limpio" y junto con otras cosas hacia que la imagen se viera muy concurrido para mi gusto. ¿Qué hay de nuevo? Aun no encuentro fotos en vista lateral de humeros/femures de Arctodus pero encontre buenas fotos de Ursus así que los nuevos estan basados en estos, modificados con las proporciones de Arctodus por supuesto, tambien rehice la caja toracica y las manos y cambie la postura. El nuevo peso lo obtuve de la misma manera que antes (GDI) pero ahora tome en cuenta los cambios estacionales en el porcetage de grasa corporal presentes en machos adultos del oso pardo, (18%-32%, Schwartz et al., 2014) los numeros estan redondeados, por cierto. 

References/Referencias.

Richards, R. L, and W. D., Turnbull. 1995. Giant short-faced bear (Arctodus simus yukonensis) remains from Fulton County, Northern Indiana. Fieldiana: Geology (New Series) 30:1–34.

Sorkin, B. 2006. Ecomorphology of the giant short-faced bears Agriotherium and Arctodus. Historical Biology 18:1–20.

Matheus, P. E. 2003. Locomotor adaptations and ecomorphology of short-faced bears (Arctodus simus) in eastern Beringia. Occasional Papers in Earth Sciences No. 7.

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horse14t's avatar
Will you do the Lesser Short-faced Bear (Arctodus pristinus)?