The Earliest Record of Pylochelid Hermit Crabs from the Late Jurassic of Southern Poland, with Notes on Paguroid Carapace Terminology

Fraaije, René H.B.; Krzemiński, Wiesław; Bakel, Barry W.M. van; Krzemińska, Ewa; Jagt, John W.M.

doi:10.4202/app.2011.0002

Cited by 18 publications

(16 citation statements)

References 9 publications

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“…The material described below was collected by the amateur palaeontologist family, Iwona, Robert and Karolina Borek, and originates from six localities in the southern Polish Uplands, north-west of Krak ow (a map was recently given in Fraaije et al 2012a, fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…This pit, the northerly portion of which is in the village of Bz ow, represents a prolongation of the large quarry at Ogrodzieniec. As explained in Fraaije et al (2012a, b), the ammonites associated indicate the Middle Oxfordian Transversarium Zone. According to G»owniak et al (2010), correction is made here for a single specimen of Cardioceras tenuiserratum Oppel, 1863, which indicates the Boreal Tenuiserratum Zone and roughly correlates with the Submediterranean lower Transversarium Zone, and not the Plicatilis Zone.…”

Section: Localitiesmentioning

confidence: 97%

“…The nomenclature of carapace regions follows that introduced for paguroids by Fraaije et al (2012a, fig. 3; 2013a, fig.…”

Section: New Terminology For Carapaces In the Superfamily Gastrodoideamentioning

confidence: 99%

“…Amongst the paguroids are the oldest known representatives of the families Pylochelidae, Parapylochelidae (Fraaije et al 2012a(Fraaije et al , 2013a(Fraaije et al , 2014 and Diogenidae (Fraaije et al 2012b), as well as various forms (parataxa) of the sixth operculate tergite (Fraaije et al 2012c). Brachyurans had already been recorded previously by Radwa nski (1972), Collins & Wierzbowski (1985), M€ uller et al (2000), Krobicki & Zato n (2008), Starzyk et al (2011Starzyk et al ( , 2012 and Starzyk (2013) while remains of macruran lobsters had been described by F€ orster & Matyja (1986) and Garassino & Krobicki (2002).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, these regions are here re-named according to the latest findings of Fraaije et al (2012a) and referred to the internal organs which had plausibly underlaid them.…”

Section: Introductionmentioning

confidence: 99%

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Allometric ontogenetic changes in two Late Jurassic gastrodorid hermit crabs (Crustacea, Decapoda, Anomura) from central Europe

Krzemińska

Krzemiński

Fraaije

et al. 2015

Journal of Systematic Palaeontology

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Extinct anomurans are known mostly by their carapaces. Regions in the fossil carapace are well delimited by grooves and, by comparison with extant hermit crabs, they can be referred to the underlying internal organs. In this paper we examine the allometric effects in ontogeny of two Jurassic hermit crabs of an extinct genus Gastrodorus: G. neuhausensis von Meyer, 1864 and G. bzowiensis sp. nov. described herein. Both species occur in Oxfordian and Kimmeridgian strata in southern Poland, but the former species only in southern Germany. Samples of carapaces of both species consisted of carapaces of a wide size range, illustrative of the various ontogenetic stages. A reduced major axis was applied for assessment of allometry. The most pronounced positive allometric effect in both species concerned the posteriormost region of the cephalothoracic shield, which became disproportionally more elongated than the overall carapace length (positive allometry) as overall size increased. Statistically significant differences between the two species concern the cardiac region, which gained in length with size in G. neuhausensis (positive allometry) and became proportionally narrower in the new species (negative allometry). Thus it may be assumed that overall growth rate of the heart region was less in the latter species. Additionally, new terminology of carapace regions previously introduced to pagurids and based on morphology of recent representatives is applied to the gastrodorids.

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Section: Methodsmentioning

confidence: 99%

Section: Localitiesmentioning

confidence: 97%

“…The nomenclature of carapace regions follows that introduced for paguroids by Fraaije et al (2012a, fig. 3; 2013a, fig.…”

Section: New Terminology For Carapaces In the Superfamily Gastrodoideamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Additionally, these regions are here re-named according to the latest findings of Fraaije et al (2012a) and referred to the internal organs which had plausibly underlaid them.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations