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New information on the pterosaur Tupandactylus imperator, with comments on the relationships of Tapejaridae

100%

Pinheiro F. L., Fortier D. C., Schultz C. L., Andrade,de J. A. F. G., Bantim R. A. M.

Acta Palaeontologica Polonica

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2011

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tom 56

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nr 3

A new specimen of Tupandactylus imperator, comprising an incomplete skull with associated lower jaw, is described. The material is the best preserved specimen of this species known so far and provides new information on the anatomy of this pterodactyloid pterosaur, especially with respect to the morphology of the lower jaw, the first one formally described for the species. Also, the new specimen shows an extensive preservation of soft tissues such as the soft−tissue component of the headcrest, ramphoteca associated with the premaxillae and lower jaw, as well as probable pycnofibres. A phylogenetic analysis was performed in order to test the relationships of the taxon within Tapejaridae. The results of the analysis support Tapejaridae, as well as monophyly of Tapejarinae and Thalassodrominae.

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New information on scavenging and selective feeding behaviour of tyrannosaurids

100%

Hone D. W. E., Watabe M.

Acta Palaeontologica Polonica

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2010

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tom 55

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nr 4

Feeding traces for carnivorous theropod dinosaurs are typically rare but can provide important evidence of prey choice and mode of feeding. Here we report a humerus of the hadrosaurine Saurolophus which was heavily damaged from feeding attributed to the giant tyrannosaurine Tarbosaurus. The bone shows multiple bites made in three distinctive styles termed “punctures”, “drag marks” and “bite−and−drag marks”. The distribution of these bites suggest that the animal was actively selecting which biting style to use based on which part of the bone was being engaged. The lack of damage to the rest of the otherwise complete and articulated hadrosaur strongly implies that this was a scavenging event, the first reported for a tyrannosaurid, and not feeding at a kill site.

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Contribution to the biology of ten vertiginid species

75%

Myzyk S.

Folia Malacologica

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2011

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tom 19

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nr 2

Laboratory and field observations on Vertigo angustior Jeffreys, V. antivertigo (Draparnaud), V. moulinsiana (Dupuy), V. pusilla O. F. Müller, V. pygmaea (Draparnaud), V. ronnebyensis (Westerlund), V. substriata (Jeffreys), Truncatellina cylindrica (Férussac), Columella aspera Waldén and C. edentula (Draparnaud) provided new information on their life cycle. Genus Vertigo: the life span is 1–3 years, with most snails dying in the next year after hatching. The reproductive season lasts from half of May till the beginning of September; depending on the life span eggs are laid during 1–3 seasons. The number of eggs per lifetime varies widely, the maximum numbers are 55–79 in V. moulinsiana, pygmaea and ronnebyensis, 102–120 in V. angustior, pusilla and substriata and 218 in V. antivertigo. Most eggs are laid at the stage of one cell (even oocyte II), but in some the advancement of development indicates retention of 1–3 days. Hatching usually starts in the second half of June and lasts till the second half of September. Only some of the snails reach maturity in the year of hatching, usually after the reproductive season. Genus Truncatellina: in the wild the life span of most individuals is about one year, some live till the age of about two years. Eggs are laid from half of June till the end of August (in laboratory maximum 11 eggs); hatching takes place from July till the end of September. Genus Columella: in the laboratory C. aspera lays eggs from half of May till the beginning of September (maximum 5 eggs); hatching starts at half of June and continues till the end of September. C. edentula in the laboratory lays eggs at half of April, and juveniles hatch at the end of May and beginning of June.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Folia Malacologica

1 Andrade,de J. A. F. G.

1 Bantim R. A. M.

1 Fortier D. C.

1 Hone D. W. E.

1 Myzyk S.

1 Pinheiro F. L.

1 Schultz C. L.

1 Watabe M.

2 2011

1 2010

New information on the pterosaur Tupandactylus imperator, with comments on the relationships of Tapejaridae

New information on scavenging and selective feeding behaviour of tyrannosaurids

Contribution to the biology of ten vertiginid species