New Late Jurassic symmetrical hermit crabs from the southern Polish Uplands and early paguroid diversification

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

doi:10.4202/app.2012.0022

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…; Fraaije et al . , b, , ; Fraaije ) whereas only two nearly complete fossil hermit crab specimens are known to date (Garassino et al . ; Schweigert et al .…”

Section: Discussionmentioning

confidence: 99%

Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

2017

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Global biodiversity patterns in deep time can only be understood fully when the relative preservation potential of each clade is known. The relative preservation potential of marine arthropod clades, a diverse and ecologically important component of modern and past ecosystems, is poorly known. We tackled this issue by carrying out a 205-day long comprehensive, comparative, taphonomic experiment in a laboratory by scoring up to ten taphonomic characters for multiple specimens of seven crustacean and one chelicerate species (two true crabs, one shrimp, one lobster, one hermit crab, one stomatopod, one barnacle and one horseshoe crab). Although the results are preliminary because we used a single experimental setup and algal growth partially hampered observations, some parts of hermit crabs, stomatopods, swimming crabs and barnacles decayed slowly relative to other parts, implying differential preservation potentials within species, largely consistent with the fossil record of these groups. An inferred parasitic isopod, manifested by a bopyriform swelling within a hermit crab carapace, decayed relatively fast.We found limited variation in the decay rate between conspecifics, and we did not observe size-related trends in decay rate. Conversely, substantial differences in the decay rate between species were seen after c. 50 days, with shrimps and stomatopods decaying fastest, suggesting a relatively low preservation potential, whereas the lobster, calico crabs, horseshoe crabs and barnacles showed relatively slow decay rates, suggesting a higher preservation potential. These results are supported by two modern and fossil record-based preservation potential metrics that are significantly correlated to decay rate ranks. Furthermore, we speculate that stemward slippage may not be ubiquitous in marine arthropods. Our results imply that diversity studies of true crabs, lobsters, horseshoe crabs and barnacles are more likely to yield patterns that are closer to their true biodiversity patterns than those for stomatopods, shrimps and hermit crabs.

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“…; Fraaije et al . , b, , ; Fraaije ) whereas only two nearly complete fossil hermit crab specimens are known to date (Garassino et al . ; Schweigert et al .…”

Section: Discussionmentioning

confidence: 99%

Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

2017

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“…The material described below originates from four localities in the southern Polish Uplands, northwest of Kraków (Poland): Bzów, Kroczyce, Niegowonice and Ogrodzieniec. The localities and their stratigraphy were characterized previously (FRAAIJE et al 2012a(FRAAIJE et al , 2012b(FRAAIJE et al , 2012cKRZEMIÑSKA et al 2015) therein also the map is provided (FRAAIJE et al 2012c: fig. 1).…”

Section: Localities and Stratigraphymentioning

confidence: 99%

New species of the genus <I>Tanidromites</I> (Decapoda: Brachyura: Tanidromitidae) from the Oxfordian of Poland

Starzyk

2015

Acta Zoologica Cracoviensia

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New species of the genus Tanidromites (Decapoda: Brachyura: Tanidromitidae) from the Oxfordian of Poland. Acta zool. cracov., 58(2): 129-136.Abstract. Brachyuran crabs of the genus Tanidromites are very common in Oxfordian localities of southern Poland. Four species were described previously from this region; another new species is described herein, T. alexandrae. The augenrest of this species differs from other representatives of the genus Tanidromites it is deep with elevated upper and suborbital margins.

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“…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%

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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New Late Jurassic symmetrical hermit crabs from the southern Polish Uplands and early paguroid diversification

Cited by 8 publications

References 21 publications

Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

New species of the genus <I>Tanidromites</I> (Decapoda: Brachyura: Tanidromitidae) from the Oxfordian of Poland

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

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