Shrimps from the Santana Group (Cretaceous: Albian): new species (Crustacea: Decapoda: Dendrobranchiata) and new record (Crustacea: Decapoda: Caridea)

Abstract

The fossil shrimp Araripenaeus timidus n. gen. n. sp. is the first fossil Penaeoidea from Brazil. Here, we describe, illustrate and compare it with Paleomattea deliciosa, a fossil Sergestoidea (Dendrobranchiata) previously described from the same region. The material of the early Cretaceous (Albian) was collected in the town of Jardim, south of the state of Ceará, in the superior septarian concretion level of the Romualdo Formation. Additionally, a second specimen of Kellnerius jamacaruensis was found in the same site of the Araripe Basin.

The transgressive-regressive cycle of the Romualdo Formation (Araripe Basin): Sedimentary archive of the Early Cretaceous marine ingression in the interior of Northeast Brazil

“…Vila Nova et al, 2011; Martill, 2011;Aires et al, 2014), turtles (e.g. Meylan, 1996;Hirayama, 1998;Kellner and Campos, 1999;Romano et al, 2013), dinosaurs (Kellner, 1997;Kellner and Campos, 2000), and crustaceans (Santana et al, 2013;Pinheiro et al, 2014).…”

First Occurrence and Paleo-Ecological Implications of Insects (Orthoptera: Ensifera Gryllidae) in the Romualdo Member of the Santana Formation, Eo-Cretaceous of the Araripe Basin

“…The material under study comes from controlled excavations in the surroundings of the geological site known as Parque dos Pterossauros (Pterosaurs' Park), in the Araripe Geopark (24M 0420 696 NO UTM 9205 958) (Figure 1 often fossiliferous (Assine 1992, Fara et al 2005, Vila Nova et al 2011 and is internationally renowned for the tridimensional preservation of its fossils (Kellner 2002, Pinheiro et al 2013. The Santana Formation, of middle-upper Albian age (Maisey 1991, Berthou 1994, Boss and Veiga 2011) is currently outcropping, surrounding a large part of the geomorphological profile of the Araripe Plateau.…”

“…The Romualdo Member, the upper unit in the Santana Formation, stands out for the quality and tridimensional preservation of its fossils in calcareous concretions, belonging to different taxonomic groups, such as Gymnosperms and Angiosperms leaves and trunks (Saraiva et al 2003, Lima et al 2012; Gastropods (Beurlen 1964); Crustaceans (Martins Neto 1987 andPinheiro et al 2013); Conchostracans (Carvalho and Viana 1993); Ostracods (Carmo et al 2004) and, especially, vertebrates: Chondrichthyes Actinopterygii (Agassiz 1841, Brito and Ferreira 1989); Testudines (Hirayama 1998, Oliveira and; Dinosauria (Kellner 1999, Kellner and Campos 1996, Martill et al 1996, Naish et al 2004; Pterosauria (Kellner 1984, Wellnhofer 1985, Kellner and Tomida 2000, Witton 2009, Bantim et al 2014andCrocodilia (Price 1959, Kellner 1987) and no insect has yet been attributed to this unit in the literature, which limits paleo-ecological inferences, since insects (especially Orthoptera) are excellent bioindicators of paleoenvironments (Martins Neto 2006).…”

Paleoecology and Paleogeography of Mollusks and Echinoids from Romualdo Formation, Aptian-Albian of the Araripe Basin, Brazil

“…A Formação Romualdo (Neoaptiano/ Eoalbiano) guarda o mais importante jazigo fossilífero da Bacia do Araripe, em termos qualitativos e quantitativos (Cavalcante & Viana, 1990). Dentre uma fauna diversificada, representada por peixes, répteis, moluscos, crustáceos, dinoflagelados e plantas (Branner, 1915;Beurlen, 1963Beurlen, , 1964Beurlen, , 1966Silva-Santos & Valença, 1968;Arai & Coimbra, 1990;Maisey, 1991;Bruno & Hessel, 2006;Lima et al, 2012;Pinheiro et al, 2014), a presença de organismos bentônicos marinhos, como moluscos e equinodermos, merece destaque por constituir uma evidência de deposição em ambiente marinho raso (Beurlen, 1963(Beurlen, , 1964.…”