Hapsidopareiontidae is an extinct family of tuditanomorph microsaurs. Hapsidopareiontids are known from the Early Permian of the United States and possibly Germany and the Czech Republic. Hapsidopareiontids are characterized by a large temporal embayment near the cheek region in which the quadratojugal is greatly reduced or absent. Members of Ostodolepidae, another microsaur family, also possess temporal embayments, but they not as extensive as those of hapsidopareiontids, which extend into the skull roof. In hapsidopareiontids, the embayment may have provided space for an enlarged jaw adductor musculature, although certain characteristics of the skull do not support this idea. Hapsidopareion and Llistrofus both possess this embayment, but in Saxonerpeton, the temporal region is complete.
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| - Hapsidopareiontidae (es)
- Hapsidopareiidae (en)
- Hapsidopareiontidae (nl)
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| - Hapsidopareiontidae es un grupo extinto de lepospóndilos que vivieron a comienzos del período Pérmico, en lo que hoy son los Estados Unidos. Está representado por los géneros Hapsidopareion, Llistrofus, Saxonerpeton y Ricnodon. (es)
- Hapsidopareiontidae is an extinct family of tuditanomorph microsaurs. Hapsidopareiontids are known from the Early Permian of the United States and possibly Germany and the Czech Republic. Hapsidopareiontids are characterized by a large temporal embayment near the cheek region in which the quadratojugal is greatly reduced or absent. Members of Ostodolepidae, another microsaur family, also possess temporal embayments, but they not as extensive as those of hapsidopareiontids, which extend into the skull roof. In hapsidopareiontids, the embayment may have provided space for an enlarged jaw adductor musculature, although certain characteristics of the skull do not support this idea. Hapsidopareion and Llistrofus both possess this embayment, but in Saxonerpeton, the temporal region is complete. (en)
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| - Life restoration of Llistrofus (en)
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| - Hapsidopareiontidae es un grupo extinto de lepospóndilos que vivieron a comienzos del período Pérmico, en lo que hoy son los Estados Unidos. Está representado por los géneros Hapsidopareion, Llistrofus, Saxonerpeton y Ricnodon. Los hapsidopareióntidos se caracterizan por una gran ensenada temporal cerca a la región de la mejilla en la cual el hueso se reduce considerablemente o está ausente. Los miembros de , otra familia de microsaurios, también poseen ensenadas temporales, pero no es tan extensa como la de los hapsidopareióntidos, la cual se extiende en la bóveda craneal. En los hapsidopareióntidos, esta ensenada puede haber provisto espacio para una musculatura abductora mandibular agrandada, aunque ciertos rasgos del cráneo no apoyan esta idea. Tanto Hapsidopareion como Llistrofus poseen esta ensenada, pero en Saxonerpeton, la región temporal está completa. La carencia de esta ensenada temporal puede excluir a Saxonerpeton de Hapsidopareiontidae; Bolt y Rieppel (2009) consideraron que Hapsidopareiontidae incluye solo a Hapsidopareion y a Llistrofus debido a esto. (es)
- Hapsidopareiontidae is an extinct family of tuditanomorph microsaurs. Hapsidopareiontids are known from the Early Permian of the United States and possibly Germany and the Czech Republic. Hapsidopareiontids are characterized by a large temporal embayment near the cheek region in which the quadratojugal is greatly reduced or absent. Members of Ostodolepidae, another microsaur family, also possess temporal embayments, but they not as extensive as those of hapsidopareiontids, which extend into the skull roof. In hapsidopareiontids, the embayment may have provided space for an enlarged jaw adductor musculature, although certain characteristics of the skull do not support this idea. Hapsidopareion and Llistrofus both possess this embayment, but in Saxonerpeton, the temporal region is complete. The lack of a temporal embayment may exclude Saxonerpeton from Hapsidopareiontidae; Bolt and Rieppel (2009) considered Hapsidopareiontidae to include only Hapsidopareion and Llistrofus because of this. (en)
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