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On the Occurrence of Iphiculus Eliasi Hyžný & Gross, 2016 (Decapoda

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On the Occurrence of Iphiculus Eliasi Hyžný & Gross, 2016 (Decapoda GEOLOGIJA 63/1, 101-108, Ljubljana 2020 © Author(s) 2020. CC Atribution 4.0 License https://doi.org/10.5474/geologija.2020.011 On the occurrence of Iphiculus eliasi Hyžný & Gross, 2016 (Decapoda, Brachyura, Leucosioidea) from the Miocene of Catalonia (northeastern Iberian Peninsula) Novi podatki o razširjenosti vrste Iphiculus eliasi Hyžný & Gross, 2016 (Decapoda, Brachyura, Leucosioidea) iz miocena Katalonije (severovzhod Iberijskega polotoka) Àlex OSSÓ1, Matúš HYŽNÝ2, Manu GÓMEZ3, David ALBALAT4 & Fernando A. FERRATGES5 1Llorenç de Villalonga, 17B, 1-1 43007 Tarragona, Catalonia; Museu de Ciències Naturals de Barcelona, Paleontologia (Barcelona, Catalonia); e-mail: [email protected] 2Department of Geology and Palaeontology, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Bratislava, Slovakia. Geological-palaeontological Department, Natural History Museum, Vienna, Austria; e-mail: [email protected] 3Sant Pere 7, 2n 08720 Vilafranca del Penedès (Catalonia); e-mail: [email protected] 4Benvingut Socies, 75, 2n, 43700, el Vendrell, Tarragona; e-mail: [email protected] 5Departamento de Ciencias de la Tierra-IUCA, Universidad de Zaragoza, Zaragoza E-50009, Spain; e-mail: [email protected] Prejeto / Received 15. 11. 2019; Sprejeto / Accepted 7. 4. 2020; Objavljeno na spletu / Published online 22. 4. 2020 Key words: Leucosioidea, Iphiculidae, Miocene, Langhian, Catalonia Ključne besede: Leucosioidea, Iphiculidae, miocen, langhij, Katalonija Abstract Recovery of two specimens of leucosioid crabs in Langhian (middle Miocene) strata at Vilafranca del Penedès (Alt Penedès, Catalonia) and a re-examination of another leucosioid from the palaeontological collections of the Vinseum (Vilafranca del Penedès, Catalonia) have led us to consider all of these as conspecific with Iphiculus eliasi Hyžný & Gross, 2016, described first from the middle Miocene of Austria. The sternal and pleonal remains preserved in one of the Catalonian specimens allows to emend the original description of the species. Likewise, a specimen from the middle Miocene of Portugal, previously described as a paguroid, is herein transferred to this species. The occurrence of I. eliasi, either in outcrops along the northeastern and southwestern coasts of the Iberian Peninsula, corroborates the close relationship between decapod assemblages which inhabited similar palaeoenvironments in the Central Paratethys, the western Mediterranean and even the nearest Atlantic waters, during the middle Miocene. Izvleček Dva nova primerka leukosioidnih rakov langhijske (srednjemiocenske) starosti iz kraja Vilafranca del Penedès (Alt Penedès, Katalonija) in dodaten primerek iz muzeja Vinseum (Vilafranca del Penedès, Katalonija) smo določili kot Iphiculus eliasi Hyžný & Gross, 2016, ki je bil prvič opisan iz srednjemiocenskih plasti Avstrije. Na podlagi dobro ohranjenih morfoloških podrobnosti sternuma in pleona lahko dopolnimo originalni opis vrste. Primerek iz srednjega miocena Portugalske je določen kot I. eliasi, ki je bil opisan kot ostanek raka samotarja. Razširjenost vrste I. eliasi na iberijskem polotoku dodatno potrjuje podobnosti med fosilnimi združbami deseteronožcev, ki so v srednjem miocenu poseljevale centralno Paratetido, zahodno Sredozemlje in plitvovodna območja v Atlantskem oceanu. Introduction Müller, 1993; Artal, 2008; Garassino et al., 2009; Ossó, 2010). Moreover, due to collecting efforts by Miocene decapod crustacean assemblages of enthusiastic fossil hunters new occurrences are the Vallès-Penedès and Camp de Tarragona ba- constantly being reported, thus expanding our sins (northeastern Iberian Peninsula) have been knowledge of fossil decapod crustacean assem- studied by a number of scholars and are well blages of these areas. One such occurrence is re- known (Almera, 1896; Via, 1932; Solé & Via, 1989; corded in the present contribution. 102 Àlex OSSÓ, Matúš HYŽNÝ, Manu GÓMEZ, David ALBALAT & Fernando A. FERRATGES Geological setting Müller (1993) summarised Neogene decapod The material studied comes from the localities crustaceans known at that time from Catalonia of Vilafranca del Penedès and Santa Margarida i and described a number of new taxa, mainly els Monjos, both within the Vallès-Penedès Basin from the reef limestones of Olèrdola, as well as and exposing Miocene strata. This basin repre- from Vilafranca del Penedès and Santa Margari- sents a NE-SW-oriented depression limited to the da i Els Monjos (Alt Penedès). More than a decade northwest and to the southeast by the Prelitoral ago, a large number of fossil decapods, mainly and Litoral ranges, respectively, which are made Palaeopinnixa mytilicola Vía, 1966 were recov- of Palaeozoic and Mesozoic rocks. The Vallès- ered in the so-called Vilafranca marls (Langhi- Penedès Basin corresponds to the emerged part an), extracted during construction works for the of the NE-SW and NNW-SSE horst and half-gra- high-speed railway line on the outskirts of Vila- ben system formed during the Oligocene-Mio- franca del Penedès. Among these, remains of a cene opening of the western Mediterranean (Bar- carapace and a counterpart of a male venter of trina et al., 1992; Cabrera & Calvet, 1996; Roca a leucosioid crab were recovered. The taxonom- et al., 1999; Cabrera et al., 2004) (Fig. 1). Rifting ic assessment of this leucosioid is the goal of the and thermal subsidence related with this open- present report. ing led to the accumulation of marine and con- tinental sediments in the Vallès-Penedès Basin, Fig. 1. Simplified geological map of the Vallès-Penedès Basin (modified from Roca et al., 2004). The main upper Burdigalian- Langhian coralgal and calcarenitic-terrigenous facies are indicated. The red stars indicate the location of the outcrops. On the occurrence of Iphiculus eliasi Hyžný & Gross, 2016 (Decapoda, Brachyura, Leucosioidea) from the Miocene of... 103 from the early to late Miocene (early Burdigalian iments are several tens of metres thick and are to Tortonian), as discussed in detail by Cabrera well exposed along a SW-NE strip attached to et al. (2004) and Casanovas-Vilar et al. (2016). Al- the Prelitoral range, south of the town of Vila- though most of the Vallès-Penedès sedimentary franca, near the villages of Moja, Santa Margari- infill is of terrestrial origin, three transgressions da i els Monjos and Castellet, among others. The occurred during the late Burdigalian, Langhian calcarenites are rich in fragments of red algae, and early Serravallian, leading to the deposition planktonic and benthic foraminifera, corals, of various marine facies (Cabrera et al., 1991; molluscs, echinoids, fish teeth and decapod crus- Cabrera & Calvet, 1996; Roca et al., 1999). During taceans. Their age ranges from late Burdigalian the most significant Langhian transgression, a to Langhian (Macpherson, 1994). The unit is lo- shallow sea developed in the Penedès area, where cated in a transition zone between the carbonate fringing reefs, carbonate platform and ramp ramp to the southeast and the open marine basin sediments, open marine marls and transitional marls to the northwest. It is interpreted to rep- shales and sands were laid down. resent distal deposits as a result of erosion and At the Vilafranca site, grey marls with inter- transport of sediments originating in the adja- bedded levels of fine sands, located predominant- cent coralgal complex. Decapod crustacean as- ly at the top of the unit, are exposed. Based on semblage at the Santa Margarida site is dominat- borehole data, the unit attains a thickness of ap- ed by portunids such as Portunus monspeliensis proximately 300 m (Permanyer, 1982; Cabrera et (A. Milne-Edwards, 1860) and Necronectes bat- al., 1991) and it extends across the Penedès Basin alleri (Via, 1941). The crab-bearing calcarenites and also south of the Llobregat River, including and marls of this unit are similar to Serraval- the southernmost part of the Vallès Basin. The lian strata in the Camp Basin, which also yield presence of the unit is more significant in the remains of the same crab species (Via, 1932; Ossó, southwest of the Penedès depression, where it 2010). occupies a central part below younger terrestri- al and marine deposits. Towards the northeast, Repositories: MGB, Museu de Geologia de the grey marls are thinner and located along the Barcelona-Museu de Ciències Naturals de southeastern margin of the basin. The unit is Barcelona (Catalonia); MV, Museu de Vila- well exposed in a number of outcrops near the franca “Vinseum” (Vilafranca del Penedès, Cat- towns of Vilafranca del Penedès, Sant Sadurní alonia). d’Anoia, Can Rosell (Subirats), Cerdanyola or Rubí; some of them have yielded decapod crus- Systematic palaeontology tacean remains (Müller, 1993; Artal, 2008; Ga- rassino et al., 2009). The Vilafranca marls con- Order Decapoda Latreille, 1802 tain also bivalves, gastropods, echinoids, benthic Infraorder Brachyura Latreille, 1802 and planktonic foraminifera, as well as remains Section Eubrachyura de Saint Laurent, 1980 of flora (Permanyer, 1982). The age of the unit is Subsection Heterotremata Guinot, 1977 based on planktonic foraminifera: late Burdiga- Superfamily Leucosioidea Samouelle, 1819 lian to Langhian (Macpherson, 1994). The marls Family Iphiculidae Alcock, 1896 are interpreted to have formed in an offshore environment (Permanyer, 1982; Cabrera et al., Iphiculus Adams & White, 1849 1991), although towards the top of the unit they Type species - Iphiculus spongiosus Adams & must have originated in a progressively shallow- White, 1849, by monotypy. er environment.
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