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How to Cite Complete Issue More Information About This Boletín de la Sociedad Geológica Mexicana ISSN: 1405-3322 Sociedad Geológica Mexicana, A.C. Bahrami, Ali; Yazdi, Mehdi; González-León, Oscar; Serrano-Sánchez, María de Lourdes; Vega, Francisco J. Crustacea (Isopoda, Anomura, Brachyura) from the Cretaceous of Soh area (NW Isfahan) Central Iran Boletín de la Sociedad Geológica Mexicana, vol. 72, no. 2, 00004, 2020, May-August Sociedad Geológica Mexicana, A.C. DOI: https://doi.org/10.18268/BSGM2020v72n2a271019 Available in: https://www.redalyc.org/articulo.oa?id=94366150004 How to cite Complete issue Scientific Information System Redalyc More information about this article Network of Scientific Journals from Latin America and the Caribbean, Spain and Journal's webpage in redalyc.org Portugal Project academic non-profit, developed under the open access initiative Boletín de la Sociedad Geológica Mexicana / 72 (2) / 2020 / 1 Crustacea (Isopoda, Anomura, Brachyura) from the Cretaceous of Soh area (NW Isfahan) Central Iran Crustacea (Isopoda, Anomura, Brachyura) del Cretácico de la región de Soh (NW de Isfahán) Irán Central Ali Bahrami 1, Mehdi Yazdi 1, Oscar González-León 2,3, María de Lourdes Serrano-Sánchez 4, Francisco J. Vega 4,* ABSTRACT 1 Department of Geology, University of Isfa- ABSTRACT RESUMEN han, POB. 81746-73441, Isfahan, I.R. Iran. 2 Posgrado en Ciencias de la Tierra, Universidad The second fossil isopod from Iran Se reporta el segundo registro de isópodo fósil Nacional Autónoma de México, Ciudad Uni- is herein reported. Additional speci- para Irán, así como varios ejemplares com- versitaria, Coyoacán, 04510, CDMX, Mexico. mens of the small lobster Huhatanka plementarios de la langosta Huhatanka ira- 3 Facultad de Estudios Superiores Iztacala, Uni- iranica Bahrami and Vega in Yazdi et nica Bahrami y Vega en Yazdi et al. (2010), versidad Nacional Autónoma de México, Tlal- al. (2010) are also revised. The afore- lo cual permite diferenciar a esta especie de la nepantla, 54070, Estado de México, Mexico. mentioned allows differentiating this otra especie del género, H. kiowana (Scott, species from the only other known 1970) del Albiano de Kansas, USA. Algu- 4 Instituto de Geología, Universidad Nacio- nal Autónoma de México, Ciudad Univer- species, H. kiowana (Scott, 1970) from nos callianassoideos, asociados al isópodo y sitaria, Coyoacán, 04510, CDMX, Mexico. the Albian of Kansas, USA. Some H. iranica, son reportados. indeterminate callianassoids, found * Corresponding author: (F. J. Vega) associated with the isopod and H. Palabras clave: Crustacea, [email protected] iranica, are also reported. Isopoda, Decapoda, Albiano, Isfahán, Irán. Keywords: Crustacea, Isopoda, Decapoda, Albian, Isfahan, Iran. How to cite this article: Bahrami, A., Yazdi, M., González-León, O., Serrano-Sánchez, M. L., Vega, F. J., 2020, Crustacea (Isopoda, Anomura, Brachyura) from the Cretaceous of Soh area (NW Isfahan) Central Iran: Boletín de la Sociedad Geológica Mexicana, 72 (2), A271019. http://dx.doi. org/10.18268/BSGM2020v72n2a271019 Manuscript received: September 08, 2019 Corrected manuscript received: October 25, 2019 Manuscript accepted: October 30, 2019 Peer Reviewing under the responsibility of Universidad Nacional Autónoma de México. This is an open access article under the CC BY-NC-SA (https://creativecommons.org/licenses/by-nc-sa/4.0/) Cretaceous Crustacea from Iran http://dx.doi.org/10.18268/BSGM2020v72n2a271019 Article A271019 2 / Boletín de la Sociedad Geológica Mexicana / 72 (2) / 2020 1. Introduction The study area is located in Central Iran (Figure 1). Following the late Cimmerian orogeny, the Early Cretaceous crustaceans from Iran are relatively Cretaceous sea advanced onto the small continent scarce and have been reported by Feldmann et of Central Iran, the transgression in the Soh area INTRODUCTION / GEOLOGY AND STRATIGRAPHY al. (2007), Yazdi et al. (2009, 2010), and McCobb began in the late Barremian and continued to the and Hairapetian (2009). The present contribution early Albian (Zahedi, 1973). A sequence of thick reports the first isopod from late Albian deposits of sediments eroded by this uplift included several central Iran, represented by a single, posterior molt lithologies such as red conglomerate, sandstones, specimen, attributed to Natatolana sp. Additional and limestones (Yazdi et al., 2010). Orbitolina gray specimens of the mecochirid Huhatanka iranica limestones with marl intercalations are late Aptian Bahrami and Vega in Yazdi et al. (2010), from the in age (Khodaverdi et al., 2016) (Figures 2 and 3). late Albian of Soh area, allow describing some Shales with intercalations of limestone contain morphological details lacking in the first report ammonites, green to gray marly limestone with by Yazdi et al. (2010). These new specimens are nodules that include Huhatanka iranica, the here compared with the type specimens of H. kiowana described isopod, small turritellid gastropods; and (Scott, 1970) from the Albian of Kansas, described nuculid bivalves (De Grave, 2009). Thick, micritic by Feldmann and West (1978). Turonian limestones overlie the crustacean beds (Figure 3). The youngest sequence (Eocene and Oligo-Miocene, Qom Formation) can be observed anywhere in the plain (Khodaverdi et al., 2016). 2. Geology and stratigraphy An angular unconformity is present between the The Iranian Plate, a major segment of the Cimmerian microcontinent, had detached from northeastern Gondwana by the end of Permian and collided with the Turan Plate (part of Eurasia) towards the end of the Triassic (Sengore, 1990; Stampfli et al., 1991; Saidi et al., 1997; Mirnejad et al., 2013). From the Early Jurassic to Senonian, the young Neo-Tethyan oceanic basin was reduced in extent by its subduction under the Iranian conti- nental plate. The final closure of the Neo-Tethys, marked by the collision between the Iranian and Arabian plates, took place during the Neo- gene (Berberian et al., 1982; Shahabpour, 2005; Ahmadi Khalaji et al., 2007). The Iranian plateau is divided into several zones from SW to NE (Fig- ure 1): Zagros fold-thrust belt, Sanandaj–Sirjan metamorphic zone, Urumieh–Dokhtar volcanic belt, central Iran zone, Alborz zone, Kopeh Dagh zone, and Eastern Iran zone (Falcon, 1967; Stock- lin, 1968; Dewey et al., 1973; Stocklin and Nabavi, 1973; Jackson and McKenzie, 1984; Sengore, 1984; Byrne et al., 1992; McCall, 2002; Blanc et Figure 1 Structural map of central Iran (modified from Bahrami al., 2003; Alavi, 2004; Walker and Jackson, 2004). et al., 2018). Cretaceous Crustacea from Iran Article A271019 http://dx.doi.org/10.18268/BSGM2020v72n2a271019 Boletín de la Sociedad Geológica Mexicana / 72 (2) / 2020 / 3 Pliocene and the Pleistocene (clastic and trav- Abbreviations: a = branchiocardiac groove, ertine), and different ages below this sequence ac = antennal carina, b = antennal groove, b1 = can be traced throughout the area. This angular hepatic groove, c = postcervical groove, cd = car- unconformity is a result of the final alpine orogenic diac groove, e1e = cervical groove, en = endopod, ex phase. The studied section (Figures 3, 4) is located = exopod, gc = gastro-orbital carina, mc = median GEOLOGY AND STRATIGRAPHY / SYSTEMATIC PALEONTOLOGY near the village of Soh (70 km northwest of Isfa- carina, oc = orbital carina, P1-P5 = pereiopods han) and is accessible by a 35 km unpaved road off 1-5, s1-s6 = pleonal somites (i-v in Figure 5), Te = the Isfahan–Tehran highway. The section is on the telson, VII-V = pereonal somites in Figure 5. right side of a seasonal river valley. Coordinates for the fossil locality are N 33°27′9″, E 51°28′32″. Structurally, the locality belongs to the Central 3. Systematic palaeontology Iran microplate, which is restricted by the NW– SE Sanandaj-Sirjan metamorphic belt to the west, Class Malacostraca Latreille, 1802 and by the Great Kavir fault to the East.Speci- Order Isopoda Latreille, 1817 mens reported here are held in the Department Suborder Cymothoida Wägele, 1989 of Geology, Faculty of Sciences, University of Family Cirolanidae Dana, 1853 Isfahan, 81746, Iran, under acronym IUMC, Genus Natatolana Bruce, 1981 and in the paleontological collection of Kent Type species: Cirolana hirtipes H. Milne State University (KSU), Kent, Ohio (USA). Edwards, 1840, by original designation, not Figure 2 Location and geologic maps of the study area with position of fossil locality (arrow), northwest of Isfahan, Iran. Cretaceous Crustacea from Iran http://dx.doi.org/10.18268/BSGM2020v72n2a271019 Article A271019 4 / Boletín de la Sociedad Geológica Mexicana / 72 (2) / 2020 subsequent designation as stated by triangular, acute posterolateral margins. Pleotelson Brusca et al. (1995). sub-triangular, two-thirds the maximum length and Natatolana sp. half the maximum width, with rounded posterior Figure 5A to 5C margin. Left pereopod 7 incompletely preserved, SYSTEMATIC PALEONTOLOGY only propodus and acute dactylus. Uropods wide, Description: Small posterior exuvia, smooth, peduncle apparently narrow; exopod narrow, preserving pereonites V–VII, pleonites i–v, ple- lanceolate, about half the length of endopod and otelson, left pereopod 7 and uropods. Pereonites one-third its maximum width; margins smooth; V–VII semirectangular, represent less than half endopod wide, subovate, rounded margins, extend the maximum length and maximum width, all of to level of posterior tip of pleotelson. about same length and width. Pleon represents Material: One specimen, IUMC-100. about one third the maximum length and about Measurements: length = 15.3 mm, width = 9.4 two thirds the
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