Taxonomy of Limnic Ostracoda (Crustacea) from the Alagamar Formation, Middle–Upper Aptian, Potiguar Basin, Northeastern Brazil

Abstract Fifteen limnic ostracodes species have been recorded in the Alagamar Formation, Potiguar Basin: Cypridea araripensis Silva, 1978a; Cypridea? sp., Harbinia sinuata (Krömmelbein and Weber, 1971); Harbinia crepata n. sp., Harbinia dimorphica n. sp., Harbinia alta Antonietto et al., 2012; Paracypria? elongata n. sp., Ilyocyprimorpha berthoui (Colin and Dépêche, 1997); Ilyocypris? sp., Brasacypris subovatum n. sp., Candona? sp., Theriosynoecum colini n. sp., T. guzzoi n. sp., T. silvai (Silva, 1978b) diagnosis emended by Do Carmo et al. (2004b); and Darwinula martinsi Silva, 1978c diagnosis emended by Do Carmo et al. (2004b). Nine of these species have also been recorded outside of the Potiguar Basin, either in other Cretaceous basins in Brazil or coeval strata in western Africa. Despite the controversy about dating the local Alagoas Stage and the relatively large range of the Zone Harbinia spp. 201–218, the material studied in this paper belongs to the interval corresponding to the well-defined palynological zone coded as P-270, which is mid-upper Aptian in age.

[1]  L. S. Antonietto,et al.  Taxonomy, Ontogeny and Paleoecology of Two Species of Harbinia TSAO, 1959 (Crustacea, Ostracoda) from the Santana Formation, Lower Cretaceous, Northeastern Brazil , 2012, Journal of Paleontology.

[2]  Stephen F. Poropat,et al.  Reassessment of the Early Cretaceous Non-Marine Ostracod Genera Hourcqia Krömmelbein, 1965 and Pattersoncypris Bate, 1972 with the Description of a New Genus, Kroemmelbeincypris , 2012, Journal of Paleontology.

[3]  George Stewardson Brady C.M.Z.S.,et al.  I.—The Ostracoda and Foraminifera of Tidal Rivers. With an analysis and descriptions of the Foraminifera, by Henry B. Brady, F.L.S. , 2009 .

[4]  J. Coimbra,et al.  On the Validity of Two Lower Cretaceous Non-marine Ostracode Genera: Biostratigraphic and Paleogeographic Implications , 2008, Journal of Paleontology.

[5]  Maria Inês Almeida Ramos,et al.  CARACTERIZAÇÃO E SIGNIFICADO PALEOAMBIENTAL DA FAUNA DE OSTRACODES DA FORMAÇÃO CODÓ (NEOAPTIANO), LESTE DA BACIA DE GRAJAÚ, MA, BRASIL , 2006 .

[6]  A. Liebau.  A revised classification of the higher taxa of the Ostracoda (Crustacea) , 2005, Hydrobiologia.

[7]  R. Mayén-Estrada,et al.  First record of Conidophrys pilisuctor (Ciliophora:Pilisuctorida) as ectosymbiont of Hyalella azteca from Mexico , 2004, Hydrobiologia.

[8]  Dermeval Aparecido Do Carmo.  Taxonomia e distribuição estratigráfica dos ostracodes da Formação Quiricó, Grupo Areado (Cretáceo inferior), bacia Sanfranciscana, Brasil , 2004 .

[9]  Dermeval Aparecido Do Carmo.  Redescrição de Theriosynoecum silvai e Darwinula martinsi, Membro Crato (Formação Santana), Cretáceo inferior, bacia do Araripe, NE – Brasi , 2004 .

[10]  A. Carreño,et al.  Biostratigraphy of Lower Cretaceous microfossils from the Araripe basin, northeastern Brazil , 2002 .

[11]  R. J. Smith.  Morphology and ontogeny of Cretaceous ostracods with preserved appendages from Brazil , 2000 .

[12]  P. Bengtson,et al.  Stratigraphy and biogeographic affinities of the late Aptian–Campanian ostracods of the Potiguar and Sergipe basins in northeastern Brazil , 2000 .

[13]  R. J. Smith.  Possible fossil ostracod (Crustacea) eggs from the Cretaceous of Brazil , 1999, Journal of Micropalaeontology.

[14]  J. Neale,et al.  Plio/Pleistocene Candonidae (Freshwater Ostracoda) from boreholes in The Nanning Area, Guangxi Province, Southern China , 1991, Journal of Micropalaeontology.

[15]  J. Maxwell,et al.  The upper Aptian-Albian succession of the Sergipe basin, Brazil: An integrated paleoenvironmental assessment , 1991 .

[16]  M. Simeoni,et al.  Taxonomy of some Cretaceous non-marine ostracods of palaeobiogeographical interest , 1991, Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen.

[17]  R. Weber,et al.  Ostracoden des Nordost-brasilianischen Wealden. , 1971 .

[18]  Raymond C. Moore.  Treatise on Invertebrate Paleontology , 1950 .

[19]  F. Swain.  Middle Mesozoic nonmarine ostracoda from Brazil and New Mexico , 1946 .

[20]  C. C. Branson.  New name for a Morrison ostracode genus , 1936 .

[21]  T. Jones.  I.—On some Fossil Entomostraca from South America , 1897, Geological Magazine.

[22]  G. Brady.  Notes on Entomostraca collected by Mr. A. Haly in Ceylon. , 1886 .

[23]  T. Jones.  On the Ostracoda of the Purbeck Formation; with Notes on the Wealden Species , 1885, Quarterly Journal of the Geological Society of London.

[24]  S. Petri,et al.  Ocorrências de ostrácodes na formação Araçatuba do Grupo Bauru, cretáceo superior da Bacia do Paraná, e possibilidades de correlação com depósitos isócronos argentinos-parte I: família ilyocyprididae , 1999 .

[25]  K. Martens,et al.  Taxonomic revision of the recent and holocene representatives of the Family Darwinulidae (Crustacea, Ostracoda), with a description of three new genera , 1998 .

[26]  A. Bodergat.  Ostracoda in the earth and life sciences , 1994 .

[27]  R. Maddocks.  Anchialine Cyprididae (Ostracoda) from the Galapagos Islands, with a review of the subfamily Paracypridinae , 1992 .

[28]  Bernard Andreu-Boussut.  Les Ostracodes du Crétacé moyen (Barremien à Turonien), le long d'une transversale Agadir-Nador (Maroc) , 1991 .

[29]  G. Carbonnel.  Ostracodes , 1984, Nouvelles archives du Muséum d'histoire naturelle de Lyon.

[30]  I. D. Pinto,et al.  Mesozoic ostracode genus Theriosynoecum Branson, 1936 and validity of related genera , 1984 .

[31]  D. Danielopol,et al.  New data on the systematics of the Limnocytheridae (Ostracoda, Cytheracea) , 1978 .

[32]  E. Musacchio.  Charophytas y ostrácodos no marinos del Grupo Neuquén (Cretácico Superior) en algunos afloramientos de las provincias de Río Negro y Neuquén, República Argentina. , 1973 .

[33]  Otto Frederik Müller.  Zoologiae danicae prodromus : seu animalium daniae et norvegae indigenarum characteres, nomina, et synonyma imprimis popularium , 1971 .

[34]  Van Morkhoven.  Post-palaeozoic Ostracoda : their morphology, taxonomy and economic use , 1962 .

[35]  K. Ramalingam.  On a new species of the genus Heteraxine (Monogenea: Axinidae) from the gills of Caranx kalla Cuv. & Val. , 1961 .

[36]  S. Prudhoe.  Trematoda, Cestoda. and Acanthocephala. , 1951 .

[37]  G. Sars.  Pacifische Plankton-Crustaceen. (Ergebnisse einer Reise nach dem Pacific. Schauinsland 1896—1897.) II. Brackwasser-Crustaceen von den Chatham-Inseln , 1905 .

[38]  J. Bosquet.  Description des entomostracés fossiles des terrains tertiaires de la France et de la Belgique , 1852 .

[39]  W Baird,et al.  Arrangement of the British Entomostracac with a list of speciesc particularly noticing those which have as yet been discovered within the bounds of the Club , 1845 .