Litholepas klausreschi gen. et sp. nov., a new neolepadine barnacle (Cirripedia, Thoracica) on a sponge from the Upper Jurassic lithographic limestones of southern Germany

Nagler, Christina; Haug, Joachim T.; Glenner, Henrik; Buckeridge, John

doi:10.1127/njgpa/2017/0648

Cited by 6 publications

(3 citation statements)

References 48 publications

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“…(Gili & Coma, 1998). Barnacles as epibionts can take advantage of such slowed water currents caused by sponges (Nagler et al, 2017). All the above statements might explain the reason why in this study the majority of barnacles found were arranged in groups near the surface of the host sponge.…”

Section: Discussionmentioning

confidence: 64%

Exploring Sponge-Inhabiting Barnacles of Eastern Indonesia Using Micro-Ct Scanning

Pitriana

Wessel

Aschenbach³

et al. 2020

TREUBIA

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We present a morphological study of Indonesian sponge-inhabiting barnacles using standard light microscopy in combination with micro-CT scanning and computer-aided 3D-reconstruction of the external shell morphology. A taxonomic analysis of the material detected four different genera of sponges inhabited by five different species of balanomorph barnacles, two of which are undescribed. Together with conventional morphological examination by dissection, we provide modern non-destructive imaging methods, using micro-CT scanning to enhance our knowledge of the morphological characters of sponge-inhabiting barnacles from eastern Indonesia. Although there were some methodological limitations regarding the contrast-enhancing technique, this study demonstrates micro-CT as a useful non-destructive technique of integrative taxonomy, for the examination of sponge-inhabiting barnacles.

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Section: Discussionmentioning

confidence: 64%

Exploring Sponge-Inhabiting Barnacles of Eastern Indonesia Using Micro-Ct Scanning

Pitriana

Wessel

Aschenbach³

et al. 2020

TREUBIA

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“…The third and biggest specimen GSUB V2304 lacks the posterior part of the body and the caudal fin. All specimens were collected and prepared by private collector Udo Resch (Eichstätt), who became famous for his skills in preparing fossils ( Hoffmann et al, 2020 ) and for important fossil finds of crustaceans and insects from the Upper Jurassic Solnhofen limestone in southern Germany that were exclusively collected by him and named after him and his parents ( Schweigert, 2010 ; Winkler, 2017 ; Nagler et al, 2017 ; Bechly, 2019 ). The material for this paper is deposited in the Geosciences Collection of the University of Bremen, Germany (GSUB).…”

Section: Methodsmentioning

confidence: 99%

Njoerdichthys dyckerhoffi gen. et sp. nov. (Pycnodontiformes, lower Turonian) northward migration caused by the Cretaceous Thermal Maximum

Cawley

Lehmann

Wiese

et al. 2020

Cretaceous Research

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A new pycnodont taxon, Njoerdichthys dyckerhoffi gen. et sp. nov., from the Turonian of the Lower Saxony Basin of Germany is described and its systematic positions is established based on phylogenetic analyses of three specimens using slightly altered data matrices. All analyses display some differences to previous analyses but show very similar results to each other apart from the interpretation of the position of several taxa such as, e.g., Palaeobalistum . The new pycnodontiform specimens from northwestern Germany are unambiguously identified as a derived member of Pycnodontidae with close relationships to Abdobalistum and Nursallia ? goedeli because of the unique combination of characters. One of the three specimens represents a juvenile form. Its morphological characters are limited, but it shares some characters with Njoerdichthys dyckerhoffi gen. et sp. nov. and is consequently allocated to the new taxon. The systematic placement of the new taxon, Njoerdichthys gen. nov., within Pycnodontidae is surprising since it does not display the one autapomorphic character (postparietal brush-like extension for muscle attachment) previously proposed to define this clade, but rather displays a combination of derived and homoplastic characters indicating that the definition of supra-generic taxa needs to be re-evaluated in the future by including more and new taxa. The distribution of pycnodontiform fishes in the Cretaceous appears to concur with changes in global climatic conditions, where high upper-ocean temperatures and high sea levels allow these fishes to migrate into higher latitudes as evidenced by the occurrence of the new taxon and Anomoeodus subclavatus in the Campanian of Sweden.

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“…The first more direct fossil indications of rhizocephalans are feminized male crabs from the Miocene (4-23 mya; Feldmann, 1998). Also important to mention in this aspect: fossils of cirripedes are well known to occur in the lithographic limestones of southern Germany (Barthel et al, 1990;Nagler et al, 2017).…”

Section: Early Fossil Record Of Cirripediamentioning

confidence: 99%

A possible 150 million years old cirripede crustacean nauplius and the phenomenon of giant larvae

Nagler

Høeg

Haug

et al. 2017

CTOZ

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The larval phase of metazoans can be interpreted as a discrete post-embryonic period. Larvae have been usually considered to be small, yet some metazoans possess unusually large larvae, or giant larvae. Here, we report a possible case of such a giant larva from the Upper Jurassic Solnhofen Lithographic limestones (150 million years old, southern Germany), most likely representing an immature cirripede crustacean (barnacles and their relatives). The single specimen was documented with up-to-date imaging methods (macro-photography, stereo-photography, fluorescence photography, composite imaging) and compared with modern cirripede larvae. The identification is based on two conspicuous spine-like extensions in the anterior region of the specimen strongly resembling the so-called fronto-lateral horns, structures exclusively known from cirripede nauplius larvae. Notably, at 5 mm in length the specimen is unusually large for a cirripede nauplius. We therefore consider it to be a giant larva and discuss possible ecological and physiological mechanisms leading to the appearance of giant larvae in other lineages. Further findings of fossil larvae and especially nauplii might give new insights into larval evolution and plankton composition in the past.

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Litholepas klausreschi gen. et sp. nov., a new neolepadine barnacle (Cirripedia, Thoracica) on a sponge from the Upper Jurassic lithographic limestones of southern Germany

Cited by 6 publications

References 48 publications

Exploring Sponge-Inhabiting Barnacles of Eastern Indonesia Using Micro-Ct Scanning

Exploring Sponge-Inhabiting Barnacles of Eastern Indonesia Using Micro-Ct Scanning

Njoerdichthys dyckerhoffi gen. et sp. nov. (Pycnodontiformes, lower Turonian) northward migration caused by the Cretaceous Thermal Maximum

A possible 150 million years old cirripede crustacean nauplius and the phenomenon of giant larvae

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