Wyniki wyszukiwania

1

Neue Untersuchungen uber Blatter der Palaeocarya orsbengensis

100%

Givulescu R.

Acta Palaeobotanica

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1994

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tom 34

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nr 1

21-26

2

Studnie i zdroje publiczne Warszawy

84%

Nowicki Z., Sokolowski J.

Źródło. Wody Mineralne i Napoje

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2008

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nr 1

14-16

3

Polski prawróbel

84%

Michalski M., Gryz P.

Wiedza i Życie

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2011

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nr 09

4

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External brain morphology of the late Oligocene musteloid carnivoran Bavarictis gaimersheimensis

67%

Modden C., Wolsan M.

Acta Palaeontologica Polonica

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2000

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tom 45

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nr 3

301-310

The carnivoran mammal Bavarictis gaimersheimensis is the type and only species of the genus, known from a single locality (Gaimersheim 1-2, MP 27-28, 24.5-26 Myr) in southern Germany. An endocranial cast of the holotype of this species indicates a low degree of posterior and ventral neopallial expansion (little overlap of the cerebellum and the piriform lobes by the neopallium, the middle portion of the rhinal fissure only slightly and smoothly elevated), and a distinctive pattern of neopallial convulations, characterized by the presence of a Y-shaped fissure mediodorsally (consisting of the ansate sulcus anteromedially, the coronal sulcus anterolaterally, and the lateral sulcus posteriorly) and an arched suprasylvian sulcus lateroventrally. The status of the cruciate sulcus is uncertain because the corresponding part of the braincase is not preserved. The species is presently best placed incertae sedis among basal musteloids.

5

An arctomorph carnivoran skull from the Phosphorites du Quercy and the origin of procyonids

51%

Wolsan M., Lange-Badre B.

Acta Palaeontologica Polonica

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1996

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tom 41

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nr 3

277-298

The size and morphological characteristics of a skull of an arctomorph carnivoran mammal from Mouillac (old collection of the Phosphorites du Quercy, of unknown age) in France closely match those of the holotype of the earliest known procyonid Pseudobassaris riggsi and another skull referred to this species, both from old collections of the Phosphorites du Quercy (Caylus and Mouillac), probably earliest Late Oligocene in age. The skull is more primitive in morphology than those of Pseudobassaris riggsi and every other known procyonid, approaching a hypothetical primitive procyonid morphotype. The only, but methodologically fundamental, departure from this morphotype is the lack of the procyonid suprameatal fossa, which is the crucial synapomorphy of the family Procyonidae. To explain the phylogenetic and taxonomic status of the arctomorph represented by the skull, three competing hypotheses are put forward. Hypothesis A, which considers the arctomorph as an individual of Pseudobassaris riggsi, assumes that the procyonid suprameatal fossa first appeared in a common ancestor of Pseudobassaris and other procyonids but was still of variable occurence within Pseudobassaris riggsi. Hypothesis B, which proposes the arctomorph as a member of a new Pseudobassaris species ancestral to Pseudobassaris riggsi, concludes that the procyonid suprameatal fossa arose in Pseudobassaris riggsi and in the Procyonidae independently, excluding Pseudobassaris from the procyonids. Hypothesis C, which recognizes the arctomorph as a representative of a new species of a new genus of the paraphyletic procyonid stem group, presumes that the procyonid suprameatal fossa originated in a common ancestor of Pseudobassaris and other procyonids after the new genus had become detached from the ancestral stock of the Procyonidae.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Acta Palaeobotanica

1 Wiedza i Życie

1 Źródło. Wody Mineralne i Napoje

2 Wolsan M.

1 Givulescu R.

1 Gryz P.

1 Lange-Badre B.

1 Michalski M.

1 Modden C.

1 Nowicki Z.

1 Sokolowski J.

1 2011

1 2008

1 2000

1 1996

1 1994

Neue Untersuchungen uber Blatter der Palaeocarya orsbengensis

Studnie i zdroje publiczne Warszawy

Polski prawróbel

External brain morphology of the late Oligocene musteloid carnivoran Bavarictis gaimersheimensis

An arctomorph carnivoran skull from the Phosphorites du Quercy and the origin of procyonids