The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina
Three species of Karakaschiceras, K. attenuatus (Behrendsen, 1892), K. neumayri (Behrendsen, 1892), and K. lycoris (Leanza and Giovine, 1949), and one species of Neohoploceras, N. arnoldi (Pictet and Campiche, 1860), are described and figured from the Valanginian strata of the Neuquen basin in west-...
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1998
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223360_v72_n1_p39_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00223360_v72_n1_p39_AguirreUrreta |
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paper:paper_00223360_v72_n1_p39_AguirreUrreta2023-06-08T14:49:43Z The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina Ammonite Karakaschiceras Neocomitidae Neohoploceras Valanginian Argentina Ammonoidea Cephalopoda Karakaschiceras Karakaschiceras Lycoris Neocomitidae Neohoploceras Neohoploceras Three species of Karakaschiceras, K. attenuatus (Behrendsen, 1892), K. neumayri (Behrendsen, 1892), and K. lycoris (Leanza and Giovine, 1949), and one species of Neohoploceras, N. arnoldi (Pictet and Campiche, 1860), are described and figured from the Valanginian strata of the Neuquen basin in west-central Argentina. The large collection of fossils available for study shows wide intraspecific variation regarding ornament and whorl section in Karakaschiceras neumayri and Neohoploceras arnoldi, casting some doubts on the current systematics applied to species of these genera. The biostratigraphic position of the four species in the Neuquen basin corresponds to the Karakaschiceras attenuatus Subzone of the Olcostephanus atherstoni Zone. This subzone is correlated with the Mediterranean Karakaschiceras inostranzewi and Saynoceras verrucosum zones of Europe at the base of upper Valanginian sections. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223360_v72_n1_p39_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00223360_v72_n1_p39_AguirreUrreta |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Ammonite Karakaschiceras Neocomitidae Neohoploceras Valanginian Argentina Ammonoidea Cephalopoda Karakaschiceras Karakaschiceras Lycoris Neocomitidae Neohoploceras Neohoploceras |
spellingShingle |
Ammonite Karakaschiceras Neocomitidae Neohoploceras Valanginian Argentina Ammonoidea Cephalopoda Karakaschiceras Karakaschiceras Lycoris Neocomitidae Neohoploceras Neohoploceras The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
topic_facet |
Ammonite Karakaschiceras Neocomitidae Neohoploceras Valanginian Argentina Ammonoidea Cephalopoda Karakaschiceras Karakaschiceras Lycoris Neocomitidae Neohoploceras Neohoploceras |
description |
Three species of Karakaschiceras, K. attenuatus (Behrendsen, 1892), K. neumayri (Behrendsen, 1892), and K. lycoris (Leanza and Giovine, 1949), and one species of Neohoploceras, N. arnoldi (Pictet and Campiche, 1860), are described and figured from the Valanginian strata of the Neuquen basin in west-central Argentina. The large collection of fossils available for study shows wide intraspecific variation regarding ornament and whorl section in Karakaschiceras neumayri and Neohoploceras arnoldi, casting some doubts on the current systematics applied to species of these genera. The biostratigraphic position of the four species in the Neuquen basin corresponds to the Karakaschiceras attenuatus Subzone of the Olcostephanus atherstoni Zone. This subzone is correlated with the Mediterranean Karakaschiceras inostranzewi and Saynoceras verrucosum zones of Europe at the base of upper Valanginian sections. |
title |
The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
title_short |
The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
title_full |
The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
title_fullStr |
The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
title_full_unstemmed |
The ammonites Karakaschiceras and Neohoploceras (Valanginian neocomitidae) from the Neuquen basin, west-central Argentina |
title_sort |
ammonites karakaschiceras and neohoploceras (valanginian neocomitidae) from the neuquen basin, west-central argentina |
publishDate |
1998 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223360_v72_n1_p39_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_00223360_v72_n1_p39_AguirreUrreta |
_version_ |
1768545082112212992 |