Metadata changes

Parent

Species.EurolGagtusnki

Document author

XWiki.Adminkap

Object changes

Object number 0 of type Species.SpeciesClass modified

Autekologia

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	1	+Terrestial herbivore.

Diagnoza

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1		-
	1	+Large semihypsodont lagomorph, smaller than //Megalagus //and larger than //Amphilagus antiquus//, //Desmatolagus//, most species of //Gobiolagus//, //Gripholagomys//, //Mytonolagus//, //Piezodus//, and //Titanomys//, and all species of //Palaeolagus, //except the larger //P. intermedius//. More strongly hypsodont than most of the primitive stem lagomorphs, with a tooth crown height comparable to that of //Megalagus //and advanced //Mytonolagus //(//M. wyomingensis//), slightly lower than that of //Amphilagus//, and markedly lower than that of the semihypsodont species of //Palaeolagus//. Curvature of the upper teeth is definitely larger than in //Palaeolagus//, less than in the rootless //Titanomys calmensis//, and similar to that in //Amphilagus//, //Desmatolagus//, //Megalagus//, //Mytonolagus//, //Titanomys visenoviensis//, and //Piezodus branssatensis//. A trilobate P2 distinguishes //Eurolagus //from the basically bilobate tooth of //Palaeolagus//. P3 is not molarized, unlike that of //Palaeolagus//; the lingual lobe of P3 is longer than in //Amphilagus//, //Desmatolagus//, //Gobiolagus//, and most of //Mytonolagus//, and more compressed anterodistally than in those genera and in //Megalagus//. P4 molarized unlike that of //Gobiolagus //and //Lushilagus//. Persistency of the enamel pattern on the upper cheek teeth separates //Eurolagus //from //Lushilagus//, //Shamolagus//, and //Gobiolagus//, in all of which the hypostriae are weak and the occlusal pattern wears relatively quickly. The hypostria is deeper than in //Desmatolagus//, and comparable to that of //Mytonolagus //and //Megalagus//; it is relatively shallow on P3 and P4 (shallower than in //Palaeolagus//) and cuts across one−third of the occlusal surface on M1 and M2. Hypostrial lakes are absent in //Eurolagus//, unlike in //Palaeolagus//, //Megalagus//, //Mytonolagus//, //Gripholagomys//, and //Desmatolagus//. The p3 is single−rooted, unlike the double−rooted tooth of //Mytonolagus//, //Megalagus//, and //Strenulagus//. The crown of p3 is bilobate and compact, with a short and relatively large trigonid, and a slightly concave anterolingual side in younger individuals, resembling in outline and proportions the p3 of //Amphilagus antiquus//, //Megalagus//, and //Gripholagomys //at most wear stages. This tooth further differs from that of //Desmatolagus//, which has a smaller trigonid, //Mytonolagus//, which has an enlarged trigonid, and //Gobiolagus//, //Lushilagus//, and //Shamolagus//,which have a trilobate p3. The lingual reentrant of p3 is much less persistent than in //Titanomys//, //Palaeolagus//, and some species of //Mytonolagus//. Together with the absence of an isolated anteroconid, this distinguishes //Eurolagus //from //Piezodus//. Differs from all genera (apart from //Mytonolagus//) in havingmore persistent reentrants on the buccal instead of the lingual side of the talonids of the lower cheek teeth. The m2 has fused roots as in //Amphilagus //and //Palaeolagus//, unlike the condition in //Megalagus //and //Mytonolagus//. The m3 is reduced in comparison to that in //Lushilagus//, //Shamolagus//, and //Gobiolagus //and marked by two conids, unlike the m3 in //Amphilagus//, //Titanomys//, and //Piezodus //(m3 with single conid). Both conids become fused late during ontogeny as in //Desmatolagus, //but unlike the condition seen in //Megalagus //and //Palaeolagus//. //Eurolagus //further differs from //Gobiolagus//, //Lushilagus//, //Mytonolagus//, and //Shamolagus// in having no trace of an additional lobe on m3.

Literatura

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1		-Depéret, C. 1887. Etudes paléontologiques dans le basin du Rhône. Période miocène. Recherches sur la succession des faunes des vertébrés miocènes de la vallée duRhône. Archives de Muséum d’histoire Naturelle de Lyon 4, 45–313.
	1	+Depéret, C. 1887. Etudes paléontologiques dans le basin du Rhône. Période miocène. Recherches sur la succession des faunes des vertébrés miocènes de la vallée duRhône. Archives de Muséum d’histoire Naturelle de Lyon 4: 45–313.
2	2
3	3	[[Fostowicz−Frelik, Ł., Nadachowski, A., and Kowalewska−Groszkowska, M. 2012. New data on the Miocene stem
4		-lagomorph //Eurolagus fontannesi//, and its northernmost record. Acta Palaeontologica Polonica 57, 1–20.>>url:http://www.app.pan.pl/archive/published/app57/app20100109.pdf]]
5		-
6		-
7		-Wegner, R.N. 1913. Tertiar und umgelagerte Kreide bei Oppeln (Oberschlesien). //Palaeontographica //60, 175–274.
	4	+lagomorph //Eurolagus fontannesi//, and its northernmost record. Acta Palaeontologica Polonica 57 (1): 1–20.>>url:http://www.app.pan.pl/archive/published/app57/app20100109.pdf]]

Locus typicus

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1		-La Grive Saint−Alban, Isère, France.
	1	+La Grive Saint−Alban (Isère, France).

Stratum typicum

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1		-Miocene, Astaracian.
	1	+Middle Miocene (Astartian).

Porównanie

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1		-Large semihypsodont lagomorph, smaller than //Megalagus //and larger than //Amphilagus antiquus//, //Desmatolagus//, most species of //Gobiolagus//, //Gripholagomys//, //Mytonolagus//, //Piezodus//, and //Titanomys//, and all species of //Palaeolagus, //except the larger //P. intermedius//. More strongly hypsodont than most of the primitive stem lagomorphs, with a tooth crown height comparable to that of //Megalagus //and advanced //Mytonolagus //(//M. wyomingensis//), slightly lower than that of //Amphilagus//, and markedly lower than that of the semihypsodont species of //Palaeolagus//. Curvature of the upper teeth is definitely larger than in //Palaeolagus//, less than in the rootless //Titanomys calmensis//, and similar to that in //Amphilagus//, //Desmatolagus//, //Megalagus//, //Mytonolagus//, //Titanomys visenoviensis//, and //Piezodus branssatensis//. A trilobate P2 distinguishes //Eurolagus //from the basically bilobate tooth of //Palaeolagus//. P3 is not molarized, unlike that of //Palaeolagus//; the lingual lobe of P3 is longer than in //Amphilagus//, //Desmatolagus//, //Gobiolagus//, and most of //Mytonolagus//, and more compressed anterodistally than in those genera and in //Megalagus//. P4 molarized unlike that of //Gobiolagus //and //Lushilagus//. Persistency of the enamel pattern on the upper cheek teeth separates //Eurolagus //from //Lushilagus//, //Shamolagus//, and //Gobiolagus//, in all of which the hypostriae are weak and the occlusal pattern wears relatively quickly. The hypostria is deeper than in //Desmatolagus//, and comparable to that of //Mytonolagus //and //Megalagus//; it is relatively shallow on P3 and P4 (shallower than in //Palaeolagus//) and cuts across one−third of the occlusal surface on M1 and M2. Hypostrial lakes are absent in //Eurolagus//, unlike in //Palaeolagus//, //Megalagus//, //Mytonolagus//, //Gripholagomys//, and //Desmatolagus//. The p3 is single−rooted, unlike the double−rooted tooth of //Mytonolagus//, //Megalagus//, and //Strenulagus//. The crown of p3 is bilobate and compact, with a short and relatively large trigonid, and a slightly concave anterolingual side in younger individuals, resembling in outline and proportions the p3 of //Amphilagus antiquus//, //Megalagus//, and //Gripholagomys //at most wear stages. This tooth further differs from that of //Desmatolagus//, which has a smaller trigonid, //Mytonolagus//, which has an enlarged trigonid, and //Gobiolagus//, //Lushilagus//, and //Shamolagus//,which have a trilobate p3. The lingual reentrant of p3 is much less persistent than in //Titanomys//, //Palaeolagus//, and some species of //Mytonolagus//. Together with the absence of an isolated anteroconid, this distinguishes //Eurolagus //from //Piezodus//. Differs from all genera (apart from //Mytonolagus//) in havingmore persistent reentrants on the buccal instead of the lingual side of the talonids of the lower cheek teeth. The m2 has fused roots as in //Amphilagus //and //Palaeolagus//, unlike the condition in //Megalagus //and //Mytonolagus//. The m3 is reduced in comparison to that in //Lushilagus//, //Shamolagus//, and //Gobiolagus //and marked by two conids, unlike the m3 in //Amphilagus//, //Titanomys//, and //Piezodus //(m3 with single conid). Both conids become fused late during ontogeny as in //Desmatolagus, //but unlike the condition seen in //Megalagus //and //Palaeolagus//. //Eurolagus //further differs from //Gobiolagus//, //Lushilagus//, //Mytonolagus//, and //Shamolagus// in having no trace of an additional lobe on m3.

Występowanie geograficzne

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1		-Opole 1, Bełchatów, widespread in Europe.
	1	+Western and central Europe.

Zasięg czasowy

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1		-Appeared during the Late Orleanian/Early Astaracian
2		-(MN 5, Rothenstein 1, Germany). The last occurrence of this
3		-species is recorded from Late Vallesian (MN 10) deposits in
4		-Spain (Trinxera Nord Autopista, Can Jofresa section, Ter−
5		-rassa) and France (Soblay near
6		-Saint−Martin−du−Mont).
	1	+Late Middle to Late Miocene.