Header

UZH-Logo

Maintenance Infos

Empty cephalopod conchs as substrates for gastropod eggs from the Hangenberg Black Shale (Late Devonian) of the Maïder Basin (Morocco)


Klug, Christian; Pohle, Alexander; Korn, Dieter (2019). Empty cephalopod conchs as substrates for gastropod eggs from the Hangenberg Black Shale (Late Devonian) of the Maïder Basin (Morocco). Fossil Imprint, 75(1):59-63.

Abstract

In the latest Famennian, black shale deposition occurred in many regions, some suggested a marine transgression
as the explanation while others saw a link with higher organic input from the land. In either case, the Hangenberg Black Shale was most likely deposited under low oxygen conditions, which enabled exceptional fossil preservation in some regions such as the southern Maïder Basin of Morocco. Here, we provide the first account of small circular structures, in some cases with thin carbon films, which remained on ammonoid and bactritoid conchs. Due to similarities in their morphology and size with other occurrences documented from Europe, we propose that these structures may represent gastropod eggs. We also discuss whether egg-deposition occurred in the water column or on the sediment surface.
Key words: Ammonoidea, Bactritoidea, Vetigastropoda, Famennian, taphonomy, Konservat-Lagerstätte

Abstract

In the latest Famennian, black shale deposition occurred in many regions, some suggested a marine transgression
as the explanation while others saw a link with higher organic input from the land. In either case, the Hangenberg Black Shale was most likely deposited under low oxygen conditions, which enabled exceptional fossil preservation in some regions such as the southern Maïder Basin of Morocco. Here, we provide the first account of small circular structures, in some cases with thin carbon films, which remained on ammonoid and bactritoid conchs. Due to similarities in their morphology and size with other occurrences documented from Europe, we propose that these structures may represent gastropod eggs. We also discuss whether egg-deposition occurred in the water column or on the sediment surface.
Key words: Ammonoidea, Bactritoidea, Vetigastropoda, Famennian, taphonomy, Konservat-Lagerstätte

Statistics

Citations

Dimensions.ai Metrics

Altmetrics

Downloads

8 downloads since deposited on 11 Sep 2019
8 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Language:English
Date:29 August 2019
Deposited On:11 Sep 2019 14:30
Last Modified:14 Jan 2020 18:05
Publisher:Narodni Muzeum
ISSN:2533-4050
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.2478/if-2019-0004

Download

Closed Access: Download allowed only for UZH members