Regurgitated ammonoid remains from the latest Devonian of Morocco

Klug, Christian; Vallon, Lothar H.

doi:10.1007/s13358-018-0171-z

Cited by 13 publications

(11 citation statements)

References 64 publications

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“…Becker et al (2019) present new record of the oldest ammonoids from Morocco, possibly even from the whole of Gondwana. Klug and Vallon (2019) interpret organic structures from the Famennian Hangenberg Black Shales as regurgitalites of predators that fed on ammonoids and regurgitated the shell fragments. Mapes et al (2019) document pairs of ammonoids from the Carboniferous of Bear Gulch and the Jurassic, which might have died during mating or other activities.…”

Section: Proceedingsmentioning

confidence: 99%

Special issue: Cephalopods through time

et al. 2019

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Section: Proceedingsmentioning

confidence: 99%

Special issue: Cephalopods through time

et al. 2019

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“…Probably, they were widely overlooked because they superficially might resemble coprolites or random accumulations of animal hard parts (Zatoń & Salamon, 2008). Published examples include regurgitated ammonoid shell shards from the latest Devonian (Klug & Vallon, 2019), pterosaur remains that were brought up by some predator (Schweigert et al, 2001) and Early Jurassic vomit containing three more or less macerated actinopterygians (Thies & Hauff, 2012). With their reviews, , Knaust and Hoffmann (2020), and Knaust (2020) wanted to increase awareness for such fossils (see also Vallon, 2012).…”

Section: Introductionmentioning

confidence: 99%

Fossilized leftover falls as sources of palaeoecological data: a ‘pabulite’ comprising a crustacean, a belemnite and a vertebrate from the Early Jurassic Posidonia Shale

et al. 2021

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Especially in Lagerstätten with exceptionally preserved fossils, we can sometimes recognize fossilized remains of meals of animals. We suggest the term leftover fall for the event and the term pabulite for the fossilized meal when it never entered the digestive tract (difference to regurgitalites). Usually, pabulites are incomplete organismal remains and show traces of the predation. Pabulites have a great potential to inform about predation as well as anatomical detail, which is invisible otherwise. Here, we document a pabulite comprising the belemnite Passaloteuthis laevigata from the Toarcian of the Holzmaden region. Most of its soft parts are missing while the arm crown is one of the best preserved that is known. Its arms embrace an exuvia of a crustacean. We suggest that the belemnite represents the remnant of the food of a predatory fish such as the shark Hybodus.

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“…This is most probably due to the retraction of the arms into the body chamber post-mortem 1 , and/or the poor preservation potential of the arms’ soft tissue 4 , 5 . Additionally, ammonites are thought to have been preyed upon by many predators 6 – 9 , and even possibly by other ammonites 10 , further reducing the probability of preserving soft tissues.…”

Section: Introductionmentioning

confidence: 99%

New evidence from exceptionally “well-preserved” specimens sheds light on the structure of the ammonite brachial crown

Smith

Landman

Bardin³

et al. 2021

Sci Rep

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Ammonite soft body remains are rarely preserved. One of the biggest enigmas is the morphology of the ammonite brachial crown that has, up till now, never been recovered. Recently, mysterious hook-like structures have been reported in multiple specimens of Scaphitidae, a large family of heteromorph Late Cretaceous ammonites. A previous examination of these structures revealed that they belong to the ammonites. Their nature, however, remained elusive. Here, we exploit tomographic data to study their arrangement in space in order to clarify this matter. After using topological data analyses and comparing their morphology, number, and distribution to other known cephalopod structures, in both extant and extinct taxa, we conclude that these hook-like structures represent part of the brachial crown armature. Therefore, it appears that there are at least three independent evolutionary origins of hooks: in belemnoids, oegospids, and now in ammonites. Finally, we propose for the first time a hypothetical reconstruction of an ammonite brachial crown.

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Regurgitated ammonoid remains from the latest Devonian of Morocco

Cited by 13 publications

References 64 publications

Special issue: Cephalopods through time

Special issue: Cephalopods through time

Fossilized leftover falls as sources of palaeoecological data: a ‘pabulite’ comprising a crustacean, a belemnite and a vertebrate from the Early Jurassic Posidonia Shale

New evidence from exceptionally “well-preserved” specimens sheds light on the structure of the ammonite brachial crown

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