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A new salamander from the late Paleocene-early Eocene of Ukraine

100%

Skutschas P. P., Gubin Y. M.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 1

A new neotenic salamander, Seminobatrachus boltyschkensis gen. et sp. nov., is described based on 14 skeletons of late Paleocene–early Eocene age preserved on drill core slabs from the Cherkassy Region, central Ukraine. The new taxon is diagnosed by the following unique combination of characters: dorsal process of premaxilla posteriorly elongate and overlaps frontal; maxilla greatly reduced in size; parietal–squamosal contact absent; vomerine tooth row long and parallel to maxillary arcade; pterygoid has long anterior process; quadrate ossified; marginal and palatal teeth pedicellate; trunk vertebrae amphicoelous, each having a subcentral keel, anterior basapophysis, and spinal nerve foramina; ribs bicipital; carpals and tarsals unossified; and phalangeal formulae of 2−2−3−2 and 2−2−3−4−2 for manus and pes, respectively. Phylogenetic analysis nests S. boltyschkensis within Urodela (i.e., crown−clade salamanders), but its exact phylogenetic position is equivocal, resolving in one of three ways: (1) in an unresolved trichotomy with Salamandra and (Ambystomatidae + (Dicamptodon + Rhyacotriton)) (results obtained in NONA v. 2.0, with the WINCLADA v. 1.00.08 interface; the parsimony ratchet (island hopper) algorithm), (2) as a sister taxon of (Salamandra + (Ambystomatidae + (Dicamptodon + Rhyacotriton))) clade (results obtained in TNT v. 1.1; the implicit enumeration search algorithm) or (3) as a sister taxon of Ambystomatidae (results obtained in PAUP v. 4.0b10; the branch−and−bound search algorithm).

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Myotomal myogenesis in Triturus vulgaris L. [Urodela] with special reference to the role of mesenchymal cells

100%

Daczewska M., Kielbowna L.

Folia Biologica

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2000

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tom 48

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nr 1-2

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Non-prey items in stomachs of Alpine newts (Mesotriton alpestris, Laurenti)

80%

Kopecky O., Vojar J., Susta F., Rehak I.

Polish Journal of Ecology

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2011

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tom 59

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nr 3

Though newts are exclusively carnivorous predators, non-prey items (silt, plants, skin sloughs) also have been found in their stomachs. There are no previous studies on this topic apart from casual reports. We conducted a dietary study of Alpine newts (Mesotriton alpestris) at two localities in the Czech Republic, focusing on the influence of sex, locality, month, and weight of digested prey on consumption of non-prey items. Localities were two fishless ponds (surface area <40 m2, depth <1 m) at an elevation of about 450 m. Both ponds were isolated from other water bodies and inhabited also by Smooth newts (Lissotriton vulgaris L.) and Common frogs (Rana temporaria L.). Newts were captured by net from the shores and stomach contents were extracted using a stomach flushing technique. We sampled 190 individuals. At least one non-prey item (i.e. silt, plants, skin sloughs) was found in 44% of newts’ stomachs. The most numerous items were plant fragments. The weight of consumed prey did not affect the presence of non-prey items in stomachs of newts. Locality (probably relating to prey availability) affected frequency of newts with plants and silt in their digestive tracts, but skin sloughs were consumed at both localities with the same frequencies. All non-prey items were consumed mainly at the beginning of the breeding season (year 1997) and with no difference in frequencies between males and females.

4

1995 update of morphological abnormalities in wild populations of the Japanese newt Cynops pyrrhogaster Boie [Urodela, Salamandridae]

80%

Fukui A., Asashima M., Meyer-Rochow V. B.

Acta Hydrobiologica

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1996

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tom 38

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nr 1-2

A survey of abnormalities was carried out on 5567 C. pyrrhogaster, which were collected in spring and autumn of 1995 in the same area of Japan as that surveyed earlier (in 1981 and 1985). As before, male and female individuals were afflicted in roughly equal proportions and cases of papilloma occurred in 1.6%. However, fewer incidences of limb-, finger-, and toe-abnormalities were recorded. The highest figure was in the autumn collection, but even then only 0.6% of all animals showed morphological abnormalities of the appendages. It is suggested that improvements in water quality and greater environmental awareness by the public could be responsible for the drop in abnormalities.

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Genetic differentiation of the two subspecies of the smooth newt inhabiting Romania, Triturus vulgaris vulgaris and T.v.ampelensis [Urodela, Salamandridae] as revealed by enzyme electrophoresis

80%

Rafinski J., Cogalniceanu D., Babik W.

Folia Biologica

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2001

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tom 49

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nr 3-4

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Male i pozyteczne.cz.III

70%

Koziarowski K.

Działkowiec

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1994

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nr 08

4

Ograniczanie wyników

2 Folia Biologica

1 Acta Hydrobiologica

1 Acta Palaeontologica Polonica

1 Działkowiec

1 Polish Journal of Ecology

1 Asashima M.

1 Babik W.

1 Cogalniceanu D.

1 Daczewska M.

1 Fukui A.

1 Gubin Y. M.

1 Kielbowna L.

1 Kopecky O.

1 Koziarowski K.

1 Meyer-Rochow V. B.

1 Rafinski J.

1 Rehak I.

1 Skutschas P. P.

1 Susta F.

1 Vojar J.

1 2012

1 2011

1 2001

1 2000