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| Guinot, Daniele. |
| All Jurassic brachyuran taxa known to date are based solely upon dorsal carapaces, and only a limited number of Early and mid-Cretaceous crabs retain ventral parts. Therefore, all Jurassic taxa and many forms from the first half of the Cretaceous are carapace-based entities. All of them are considered to be "dromiaceans", podotremes to be precise. The recent discovery of an exceptionally well-preserved male crab from the Upper Cretaceous (lower Cenomanian) of Chiapas (Mexico), Archaeochiapasa tnairioqueoi Guinot, Carbot-Chanona & Vega, 2019, at first sight of a podotreme nature, has allowed a detailed description of its thoracic sternum and pleon, which revealed that it was actually a typical eubrachyuran, in need of a new family, Archaeochiapasidae... |
| Tipo: Text |
Palavras-chave: Upper Jurassic; Cretaceous; Prosopidae; Lecythocaridae; Bucculentidae; Nodoprosopidae; Glaessneropsidae; Viaiidae; Homolodromioidea; Homoloidea; Glaessneropsoidea; Goniodromitinac; Sphaerodromiinae; Eubrachyura; Callichimacroida; Podotreme; New classification. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00659/77084/78427.pdf |
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| Robin, N.; Bakel, B.W.M. van; Hondt, J.-L. d'; Charbonnier, S.. |
| The earliest known crabs are of Early and Middle Jurassic age; in general, they are rare. Here we describe a new species of homolodromioid from the late Bathonian of Sarthe (France), based on a single dorsal carapace, Tanidromites raboeufi n. sp. This specimen has mostly well-preserved cuticle, and shows two episkeletozoans (bryozoan colonies) on its dorsal side, which is unique amongst early brachyurans (Early and Middle Jurassic). These bryozoans are identified as juvenile colonies of the morphogenus Berenicea (sheet-like tubuluporines), typical encrusters of hard substrates. Their presence directly on the carapace crab shows that they were closely cohabitating with this early brachyuran in its palaeoenvironment. One of these colonies appears to have... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bathonian; Cyclostome bryozoans; Epibiosis; Episkeletozoans; Homolodromioidea; 38.22; 42.74. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/578952 |
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