title: Taphonomy and diversity of Middle Miocene decapod crustaceans from the Novohrad-Nógrad Basin, Slovakia, with remarks on palaeobiography.
abstract: Decapod crustacean assemblages from the Middle Miocene (lower 'Badenian'=Langhian) volcanoclastic Plášťovce Beds (Sebechleby Formation) in the Slovakian part of the Novohrad-Nógrad Basin comprise five species in five families (Callianassidae, Laomediidae, Munididae, Cancridae and Retroplumidae) and are dominated by the cancrid crabTasadia carniolica(Bittner, 1884).Munidasp. constitutes the first record of this genus from Slovakia and the second from the European Neogene. Burrowing shrimp (Jaxea kuemeliBachmayer, 1954) are associated with burrows tentatively attributed to this species. The occurrence ofRetropluma slovenicaGašparič & Hyžný, 2014, previously recorded from the Lower Miocene of Slovenia, extends both the geographical distribution and stratigraphical range of the species. Differential decapod diversity at four localities in the Plášťovce area can be explained by collecting bias and palaeoenvironmental factors. The palaeosetting is interpreted as a muddy-bottom, nearshore zone with a water depth of approximately 100 m. Abundant articulated crabs suggest rapid burial. Third maxillipeds in open posture in some specimens may indicate respiratory stress of the animals, suggesting episodic events of rapid volcanoclastic flows responsible for killing crabs and promoting their preservation. Species composition of the decapod fauna of the Plášťovce Beds further strengthens similarities with Miocene faunas from the North Sea Basin.
authors: Naturhistorisches Museum Wien, Geologisch-Paläontologische Abteilung, Burgring 7, 1010 Vienna, Austria; e-mail: hyzny.matus@gmail.com; Department of Geology and Palaeontology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia; e-mail: hudackova@fns.uniba.sk.
authors: Matúš
authors: M
authors: Hyžný
authors: Department of Geology and Palaeontology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina, Ilkovičova 6, Bratislava 842 15, Slovakia; e-mail: hudackova@fns.uniba.sk.
authors: Natália
authors: N
authors: Hudáčková
authors: Plášťovce 87, 935 82, Slovakia; email: szalma.istvan7@gmail.com.
authors: Štefan
authors: Š
authors: Szalma
keywords: Decapoda; Middle Miocene; Novohrad-Nógrad Basin; Plášťovce Member; Sebechleby Formation; volcanoclastics taphonomy