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首页> 外文期刊>Journal of Systematic Palaeontology >A reassessment of the genus Groeberia Patterson, 1952 (Mammalia, Metatheria): functional and phylogenetic implications
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A reassessment of the genus Groeberia Patterson, 1952 (Mammalia, Metatheria): functional and phylogenetic implications

机译：重新评估Groeberia Patterson，1952年（哺乳动物，梅瑟伊）：功能性和系统发育影响

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摘要

With two recognized species, the extinct (late Eocene) Groeberia is periodically at the centre of systematic disputes. On the basis of its best-preserved specimen, we describe in detail the dental and functional morphology of the masticatory apparatus of Groeberia minoprioi. A review of its dental anatomy indicates that Groeberia has a tribosphenic molar pattern which confirms its therian affinities. Its dental formula of I2/1; C1/1; P3/1; M4/4 is compatible with the usual metatherian set of three premolars and four molars in the upper dentition, and with the common 'pseudodiprotodont' lower postcanine formula of one premolar (p3) and four molars. A cladistic analysis resulted in the inclusion of Groeberia among australidelphian metatherians, clustering with vombatiform diprotodontians in the strict consensus tree; however, these affinities require further testing. The functional morphology of the masticatory apparatus suggests distinct incisive and chewing phases. The incisive stroke was followed by a power stroke with a combination of proal and ectental motion of the jaw. Integrating the results of masticatory movements, occlusal tooth wear, infraorbital foramen size, and body mass estimations (90.2 g for G. pattersoni and 216.3 g for G. minoprioi), we suggest an omnivorous diet with a preference for plant material, like that characterizing living potoroids.
机译：凭借两个公认的物种，灭绝（后期eocene）Groeberia在系统纠纷的中心定期。在其最佳保存的标本的基础上，我们详细介绍了Groeberia微型高原的咀嚼装置的牙科和功能形态。对其牙科解剖学的审查表明，Groeberia具有培训型摩尔模式，证实其亲情。 I2 / 1的牙科配方; C1 / 1; P3 / 1; M4 / 4与常用的三种前牙珠和四个磨牙兼容，在上牙齿和四个晶体中的常见后的较高后（P3）和四个臼齿的较低的梅德里氏菌。紧长的分析导致澳尔卫生儿·莫德利亚人在澳大利亚人的格罗卜亚洲纳入了Goomberia，在严格的共识树中与vombatiform diprotodontians聚集;但是，这些亲和力需要进一步测试。咀嚼装置的功能形态表明明显的抗静和咀嚼阶段。 inciSive中风随后是电力冲程，其组合钳口的近端和ectentent运动。整合咀嚼运动的结果，咬合牙齿磨损，眶下孔径尺寸和体重估计（对于G.Pattersoni的90.2g和216.3g，对于G. minoproio），我们表明含有植物材料的唯一饮食，如这种表征生活波托水糖。

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  • 来源
    《Journal of Systematic Palaeontology》 |2020年第12期|975-992|共18页
  • 作者

    Ana Natalia Zimicz; Francisco Javier Goin;

  • 作者单位

    CONICET - Consejo National de Investigaciones Cientificas y Tecnicas Argentina Instituto de Bio y Geociencias del Noroeste Argentino Avenida Bolivia 5550 4400 Salta Argentina;

    CONICET - Consejo National de Investigaciones Cientificas y Tecnicas Argentina Museo de La Plata Division Paleontologia Vertebrados Paseo del Basque s B1900FWA La Plata Argentina MORPHOS Lab Facultad de Ciencias Naturales y Museo Universidad National de La Plata B1900FWA La Plata Argentina;

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  • 正文语种 eng
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  • 关键词

    Gondwanatheria; Theria; Metatheria; Bonapartheriiformes; Diprotodontia; occlusal wear;

    机译：Gondwanatheria;theria;搬家;BONAPARTHERIORNES;Diprotodontia;咬合磨损;

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