Brachiopods and Their Auloporid Epibionts in the Devonian of Boulonnais (France): Comparison with Other Associations Globally

Mistiaen, Bruno; Brice, Denise; Zapalski, Mikołaj K.; Loones, Christian

doi:10.1007/978-90-481-3428-1_7

Cited by 17 publications

(15 citation statements)

References 25 publications

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“…This indicates a narrow ecological niche of endobionts, most likely within the deeper euphotic zone. Biotic and taphonomic conditions (size selectivity of host shell, surface selectivity of host shell, time of exposure of shells on the sea floor) observed in both Bohemian occurrences are consistent with biotic and taphonomic observations of bioencrustation and bioerosion processes elsewhere in the Palaeozoic (Mistiaen et al 2012, Smrecak & Brett 2014, Furlong & McRoberts 2014.…”

Section: Resultssupporting

confidence: 74%

“…Observations by numerous workers (Hurst 1974, Lebold 2000, Lescinsky et al 2002, Mistiaen et al 2012, Furlong & McRoberts 2014 have shown, that, at least in some instances, sclerobiont encrustations and endobiont microborings occurred while the host was alive. The host was by some way affected by sclero-or endobionts (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Unburied and shallowly buried shells encounter more opportunities for bioerosion and taphonomic damage (Davies et al 1989, Tomašových & Zuschin 2009, Smrecak & Brett 2014. Shell size was found to be another important limiting factor in encrustation and bioerosion (Lescinsky et al 2002, Rodland et al 2004, Mistiaen et al 2012. Smrecak & Brett (2014) suggested that sclerobionts provide more sensitive palaeoecological indicator for relative depth than do microendobionts.…”

Section: Discussionmentioning

confidence: 99%

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Dendritic microborings in brachiopod shells from the Silurian of the Barrandian area, Czech Republic

Mergl¹

2020

Bull. Geosci.

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Dendritic and/or rosette-like microborings in calcareous and phosphatic skeletal substrates have a long geological history, spanning most of the Phanerozoic. Wisshak (2017) distinguished seven ichnogenera and twenty-two ichnospecies in his updated survey of the ichnofamily Dendrinidae. Their most prominent occurrences are in Devonian brachiopod shells and Upper Cretaceous belemnite guards. Wisshak listed the dendrinid ichnogenera

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Section: Resultssupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Dendritic microborings in brachiopod shells from the Silurian of the Barrandian area, Czech Republic

Mergl¹

2020

Bull. Geosci.

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“…The runner-like encrusters were initially thought to be auloporid corals (De Baets et al 2013b), which are known to encrust brachiopods (Zapalski 2005;Mistiaen et al 2012) and…”

Section: Identity Of the Encrustersmentioning

confidence: 99%

Peer Review #1 of "3D-Analysis of a non-planispiral ammonoid from the Hunsrück Slate: natural or pathological variation? (v0.1)"

Wani¹

2017

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We herein examine the only known non-planispirally coiled early Devonian ammonoid, the holotype specimen of Ivoites opitzi, to investigate if the host was encrusted in vivo and if these sclerobionts were responsible for the trochospiral coiling observed in this unique specimen. To test if the presence of runner-like sclerobionts infested the historically collected specimen of Ivoites opitzi during its life, we used microCT to produce a threedimensional model of the surface of the specimen. Our results indicate that sclerobionts grew across the outer rim (venter) on both sides of the ammonoid conch at exactly the location where the deviation from the planispiral was recognized, and where subsequent ammonoid growth would likely preclude encrustation. This indicates in vivo encrustation of the I. opitzi specimen, and represents the earliest documentation of the phenomenon. Further, this suggests that non-planispiral coiling in I. opitzi was likely pathologically induced and does not represent natural morphological variation in the species. Despite the observed anomalies in coiling, the specimen reached adulthood and retains important identifying morphological features, suggesting the ammonoid was minimally impacted by encrustation in life. As such, appointing a new type specimen-as suggested by some authors-for the species is not necessary. In addition, we identify the sclerobionts responsible for modifying the coiling of this specimen as hederelloids, a peculiar group of sclerobionts likely related to phoronids. Hederelloids in the Devonian are commonly found encrusting on fossils collected in moderately deep environments within the photic zone and are rarely documented in dysphotic and aphotic samples. This indicates that when the ammonoid was encrusted it lived within the euphotic zone and supports the latest interpretations of the Hunsrück Slate depositional environment in the Bundenbach-Gemünden area.

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“…The runner-like encrusters were initially thought to be auloporid corals (De ), which are known to encrust brachiopods (Zapalski 2005;Mistiaen et al 2012) and ammonoids (Klug & Korn 2001) during their lifetime. Some auloporid taxa have been confused with hederelloids in the past (Fenton & Fenton 1937;Elias 1944) and can be hard to differentiate when taphonomic conditions have degraded the quality of the specimen due to gross morphological similarities.…”

Section: Identity Of the Encrustersmentioning

confidence: 99%

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Supplemental Information 1: Video of the Three-Dimensional Model of KGM 1983/147

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Brachiopods and Their Auloporid Epibionts in the Devonian of Boulonnais (France): Comparison with Other Associations Globally

Cited by 17 publications

References 25 publications

Dendritic microborings in brachiopod shells from the Silurian of the Barrandian area, Czech Republic

Dendritic microborings in brachiopod shells from the Silurian of the Barrandian area, Czech Republic

Peer Review #1 of "3D-Analysis of a non-planispiral ammonoid from the Hunsrück Slate: natural or pathological variation? (v0.1)"

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