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Studia nad delfinami na poludniowo-wschodnim wybrzezu Afryki

100%

Kaczmarski L., Cockroft V. G.

Wszechświat

|

1993

|

tom 94

|

nr 04

88-91

2

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Globicephaline whales from the Mio-Pliocene Purisima Formation of central California, USA

72%

Boessenecker R. W., Perry F. A., Geisler J. H.

Acta Palaeontologica Polonica

|

2015

|

tom 60

|

nr 1

Oceanic dolphins (Odontoceti: Delphinidae) constitute the most speciose family of extant cetaceans, yet their fossil record is limited. Although several extinct species are known from Mediterranean and North Atlantic localities, there are few examples from deposits along the Pacific Rim. Despite the rich record of successive marine mammal fossil assemblages in the extensively sampled eastern North Pacific, only one fossil delphinid, Protoglobicephala (Pliocene, Baja California), has been described. We report globicephaline remains from the Mio-Pliocene Purisima Formation of Northern California, including a partial cranium and two isolated petrosals. The skull exhibits large ridges on the premaxillae, and cannot be referred to any extant globicephaline genus. Similarly, the petrosals cannot be referred to any described delphinid genus, although they are most similar to those of Globicephala. Linear regression analyses demonstrate that promontorium length and bony nares width scale significantly within delphinidans, and provide a new method for testing referrals of isolated fossil odontocete petrosals to taxa known only by crania. Applying this method to the new globicephalines from the Purisima Formation, we find the petrosals to be too small to represent the same taxon as the skull, thus indicating the presence of two separate species. Our results demonstrate that globicephalines had achieved a worldwide distribution by the early Pliocene, suggesting diversification of the subfamily by 5 Ma.

3

Out of the Pacific: A second fossil porpoise from the Pliocene of the North Sea Basin

72%

Colpaert W., Bosselaers M., Lambert O.

Acta Palaeontologica Polonica

|

2015

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tom 60

|

nr 1

Although modern porpoises (Phocoenidae, Odontoceti, Cetacea) occupy most oceanic regions of the world, their fossil record outside the Pacific Ocean remains extremely scarce. Based on a partial skull from lower Pliocene layers (Kattendijk Formation, Zanclean, 5–4.4 Ma) of the Antwerp harbour, a new genus and species of fossil phocoenid, Brabocetus gigaseorum gen. et sp. nov., is described. The new taxon is diagnosed by a unique combination of characters including an anterolateraly widely-open antorbital notch, the anteromedial sulcus being shorter than the posteromedial sulcus, the frontal boss being longer than wide, pronounced asymmetry of the vertex, and the possible presence of an additional longitudinal sulcus across the premaxillary eminence. The phylogenetic analysis indicates that B. gigaseorum is not closely related to extant phocoenids; it is included in a clade comprising most north-west Pacific fossil species, two north-east Pacific fossil species, and the only previously described North Sea fossil species Septemtriocetus bosselaersi. Considering the paleobiogeographic distribution of phocoenids, an early Pliocene arrival from the North Pacific to the North Sea may be correlated to the early opening of the Bering Strait and migration via the Arctic. The presence of S. bosselaersi in younger deposits (Piacenzian) of the southern margin of the North Sea Basin could be the result of either a second dispersal event, or of local speciation in the North Sea, whereas an additional trans-Arctic migration from the North Pacific lead to the present occupation of the North Atlantic and North Sea by the phylogenetically distantly related harbor porpoise Phocoena phocoena.

4

Pochodzenie i ewolucja ssaków morskich Polski

58%

Wolsan M.

Przegląd Zoologiczny

|

1991

|

tom 35

|

nr 3-4

5

Africanacetus from the sub-Antarctic region: The southernmost record of fossil beaked whales

58%

Gol'din P. E., Vishnyakova K. A.

Acta Palaeontologica Polonica

|

2013

|

tom 58

|

nr 3

We report two partial skulls of fossil beaked whales (Odontoceti, Ziphiidae) of uncertain age trawled from the sea floor of the sub−Antarctic Indian Ocean (58 to 60S), representing the southernmost record of the family. The skulls possess diag− nostic features of the genus Africanacetus, several specimens of which have been recovered from the sea floor off South Africa, but differ from the type and only known species Africanacetus ceratopsis in their larger size. This difference may either reflect intraspecific variation or indicate the existence of a hitherto unrecognised species. The two specimens are characterised by unusually developed mesorostral ossifications, combined with maxillary crests occurring in the facial re− gion. Both of the latter are found in a range of extant and extinct ziphiids, and known to be sexually dimorphic in extant beaked whales. These structures may be the result of hypermorphosis driven by sexual selection, and could be involved in male−specific behaviour.

6

A new kentriodontine dolphin from the middle Miocene of Portugal

58%

Lambert O., Estevens M., Smith R.

Acta Palaeontologica Polonica

|

2005

|

tom 50

|

nr 2

A nearly complete skull, a partial left scapula, five lumbar vertebrae, and some fragments of ribs of a medium−sized kentriodontid dolphin (Cetacea, Odontoceti) discovered in the middle Miocene of Setúbal Peninsula, Lower Tagus Basin, Portugal, are herein assigned to a new genus and species, Tagicetus joneti. Within the grade−level family Kentriodontidae, the new taxon is referred to the specifically and ecologically diversified subfamily Kentriodontinae, essentially defined by a well−developed posterolateral projection of the nasal. The elongated rostrum, the constriction of the asymmetric premaxillae at the base of the rostrum, the anteriorly elongated palatines, and the elevated vertex of T. joneti suggest closer affinities with the larger, more derived Macrokentriodon morani, from the middle Miocene of Maryland (USA). Among other features, T. joneti differs from the latter in having more numerous maxillary teeth and shorter zygomatic processes of the squamosals. Besides providing additional indications about the evolutionary trends within the Kentriodontinae, this occurrence constitutes the first record of the subfamily from the east coast of the North Atlantic based on a nearly complete skull. Considering their morphological diversity and wide geographic range, the Kentriodontinae may have constituted one of the dominant groups of Miocene oceanic dolphins.

7

Wieloryby i wielorybnictwo

58%

Solski L.

Wiedza i Życie

|

1998

|

nr 07

18-22

8

Kilka uwag do artykulu Z.Majlert 'Zachowanie epimeletyczne waleni'

58%

Lomnicki A.

Wszechświat

|

1993

|

tom 94

|

nr 01

13

9

Zachowanie epimeletyczne waleni

58%

Majlert Z.

Wszechświat

|

1993

|

tom 94

|

nr 01

9-12

10

Kilka uwag na temat waleni

57%

Kaczmarski L.

Wszechświat

|

1993

|

tom 94

|

nr 04

87

11

Muzyka przyrody - oceany, morza i wody śródlądowe

51%

Mazurkiewicz-Zapalowicz K.

Ekonatura

|

2013

|

nr 12

12

Wieloryby - lagodne olbrzymy czy morskie potwory?

51%

Przybysz M.

Salamandra:Magazyn Przyrodniczy

|

2004

|

nr 2

14-20

13

Delfiny i wieloryby

51%

Kaczmarski L.

Przyroda Polska

|

1992

|

nr 11

12-13

14

Uwagi dotyczące wykazu chronionych ssaków w Wietnamie

44%

van Sung C.

Chrońmy Przyrodę Ojczystą

|

1991

|

tom 47

|

nr 3

15

Ginace gatunki waleni

43%

Kaczmarski L.

Przyroda Polska

|

1993

|

nr 07

14

16

Ssaki - zdobywcy oceanow

36%

Wong K.

Świat Nauki

|

2002

|

nr 07

44-53

17

Kosmopolita wod

36%

Czerwinski Z.

Królestwo Przyrody

|

1997

|

nr 3

21-22

Ograniczanie wyników

Studia nad delfinami na poludniowo-wschodnim wybrzezu Afryki

Globicephaline whales from the Mio-Pliocene Purisima Formation of central California, USA

Out of the Pacific: A second fossil porpoise from the Pliocene of the North Sea Basin

Pochodzenie i ewolucja ssaków morskich Polski

Africanacetus from the sub-Antarctic region: The southernmost record of fossil beaked whales

A new kentriodontine dolphin from the middle Miocene of Portugal

Wieloryby i wielorybnictwo

Kilka uwag do artykulu Z.Majlert 'Zachowanie epimeletyczne waleni'

Zachowanie epimeletyczne waleni

Kilka uwag na temat waleni

Muzyka przyrody - oceany, morza i wody śródlądowe

Wieloryby - lagodne olbrzymy czy morskie potwory?

Delfiny i wieloryby

Uwagi dotyczące wykazu chronionych ssaków w Wietnamie

Ginace gatunki waleni

Ssaki - zdobywcy oceanow

Kosmopolita wod