Evolutionary History of Cephalopod Pathologies Linked with Parasitism

Baets, Kenneth De; Hoffmann, René; Mironenko, Aleksandr A.

doi:10.1007/978-3-030-52233-9_7

Cited by 5 publications

(2 citation statements)

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“…In addition, at least some papers indicate that ammonoids (De Baets et al, 2013b) as well as some extinct groups of nautiloids (Mironenko, 2018;Turek & Manda, 2016) and the modern coleoid Spirula spirula (Hoffmann et al, 2018a(Hoffmann et al, , 2018b show changes in septal distance and/ or shape associated with injuries and pathologies attributed parasitic infestations (reviewed in De Baets et al, 2021). De Baets et al, (2013bBaets et al, ( , 2015b did not find a general correlation between septal spacing and spacing of structures interpreted to reflect repeated parasitic infestations in a specimen of the Early Devonian ammonoid Ivoites opitzi.…”

Section: Injuries and Pathologiesmentioning

confidence: 99%

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

et al. 2021

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Septal crowding is widely known as a sign of maturity in conchs of ammonoids and nautiloids. However, reduced septal spacing may also occur as a consequence of adverse ecological conditions. Here, we address the question how septal spacing varied through ontogeny in representatives of some of the major clades of Devonian and Carboniferous ammonoids. We found that the degree of ontogenetic variation is similar between clades and that variation is only weakly linked with conch form. The results show that septal crowding alone is insufficient to identify adulthood in ammonoids; intermediate septal crowding is a common phenomenon and occurs in various growth stages. Changes in septal distances during ontogeny were, in addition to adulthood of the individuals, a passive reaction likely caused by fluctuating environmental conditions.

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Section: Injuries and Pathologiesmentioning

confidence: 99%

Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids

et al. 2021

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“…Abnormalities are common in living organisms; the term usually refers to soft body or skeletal tissue malformation of individuals that occur during ontogeny. However, malformations are known from the fossil record too, and have been reported from individuals of different fossil groups, including foraminifera ( Ballent & Carignano, 2008 ), trilobites ( Owen, 1985 ; Babcock, 1993 ), brachiopods ( Copper, 1967 ; He et al, 2017 ), bivalves ( Savazzi, 1995 ), gastropods ( Lindström & Peel, 2010 ), cephalopods ( De Baets, Keupp & Klug, 2015 ; Hoffmann & Keupp, 2015 ; Mironenko, 2016 ; De Baets, Hoffmann & Mironenko, 2021 ), echinoderms ( Thomka, Malgieri & Brett, 2014 ), graptolites ( Han & Chen, 1994 ), insects ( Vršanský, Liang & Ren, 2012 ), conodonts ( Weddige, 1990 ), shark teeth ( Itano, 2013 ), amphibians ( Witzmann et al, 2013 ), reptiles ( Buffetaut et al, 2007 ), primate teeth ( Tougard & Ducrocq, 1999 ), and plankton ( Vandenbroucke et al, 2015 ; Bralower & Self-Trail, 2016 ). In addition to gene mutations or embryonic developmental disorders, malformed fossils may also have resulted from healed injuries and pathology ( Owen, 1985 ; Babcock, 1993 ; Kelley, Kowalewski & Hansen, 2003 ; Vinn, 2017 , 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Malformations in Late Devonian brachiopods from the western Junggar, NW China and their potential causes

Zong¹,

Gong²

2022

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Although malformations are found in both extant organisms and the fossil record, they are more rarely reported in the fossil record than in living organisms, and the environmental factors causing the malformations are much more difficult to identify for the fossil record. Two athyrid brachiopod taxa from the Upper Devonian Hongguleleng Formation in western Junggar (Xinjiang, NW China) show distinctive shell malformation. Of 198 Cleiothyridina and 405 Crinisarina specimens, 18 and 39 individuals were malformed, respectively; an abnormality ratio of nearly 10%. Considering the preservation status and buried environment of the abnormal specimens, and analysis of trace elements and rare earth elements from whole-rock and brachiopod shells, we conclude that the appearance of malformed athyrids is likely related to epi/endoparasites, or less likely the slightly higher content of heavy metal in the sea.

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