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

Abstract

The Romualdo Member of the Santana Formation, a lithostatigraphic unit attributed to a marine intrusion, is famous for its preserved fossils in calcareous concretions, which stand out for their diversity and excellent preservation levels. This paper aims to record the first occurrence of the Class Insecta in the Romualdo Member of the Santana Formation of the Araripe Basin, as well as to describe and discuss the paleoecological implications of such finding. The first occurrence of the order Orthoptera (family Gryllidae) is presented for this unit. This new species is attributed to the genus Araripegryllus, that lasted throughout the deposition of the Crato Member, which is under the Romualdo Member. In reference to its statigraphic origin, the specimens was named Araripegryllus romualdoi sp. nov.

Semi-aquatic adaptations in a spinosaur from the Lower Cretaceous of Brazil

“…Almost yearly, new exceptional vertebrate and invertebrate fossils are discovered and described from the basin (e.g., Kellner et al, 2013, Bantim et al, 2014, Pinheiro et al, 2014, Maldanis et al, 2016, Freitas et al, 2016. Including a possible Megalosauroidea with affinities to Spinosauridae from the Ipubi Formation (which underlies the Romualdo Formation) which is still undescribed (see Silva et al, 2013).…”

The Brazilian Fossil Insects: Current Scenario

“…Martins-Neto, 2005a). Neste período de pouco mais de 13 anos houve a publicação formal de 125 novas espécies para a Bacia do Araripe (Bechly, 2000(Bechly, , 2007a(Bechly, , b, c, 2010Bechly & Makarkin, 2016;Bechly et al, 2000;Cassola & Werner, 2004;Delclòs et al, 2008;Engel & Chatzimanolis, 2005;Fleck & Nel, 2003;Freitas et al, 2016;Gratshev & Legalov, 2014;Grimaldi, 2003Grimaldi, , 2008Haas, 2007;Heads, 2008;Heads et al, 2005;Jattiot et al, 2012;Jepson et al, 2011;Krzeminski et al, 2015;Lee, 2014Lee, , 2016Makarkin & Menon, 2005Martins-Neto, 2005b;Martins-Neto, Gallego, Brauckmann & Cruz, 2007;Martins-Neto, Melo & Prezoto, 2007;Martins-Neto & Szwedo, 2007;Martins-Neto & Tassi, 2009;Mendes, 2000Mendes, , 2011Mendes & Coelho, 2007;Menon, Heads & Martill, 2005;Menon, Martins-Neto & Martill, 2005;Menon & Makarkin, 2008;Millet & Nel, 2010;Osten, 2007;Ruf et al, 2005;Santos et al, 2011;Schomann & Solodovnikov, 2012;…”

“…Cratogryllus ciguelli Martins-Neto, 1991b Araripegryllus romualdoi Freitas, Moura & Saraiva, 2016 Gryllotalpidae Archaeogryllotalpoides ornatus Martins-Neto, 1991b Palaeoscapteriscopsis cretacea Martins-Neto, 1991b Cratotetraspinus fossorius (Martins-Neto, 1995b) Hagloidea Cratohaglopsis santanaensis Martins-Neto, 1991b…”

“…Protopoctro asodes Darling & Sharkey, 1990 Cretofedtschenkia santanensis Osten, 2007 Incertae Azar & Nel (2002); Bechly (1998Bechly ( , 2000Bechly ( , 2007ª, b, c, 2010; Bechly & Ueda (2002); Bechly et al (2001); Brandão et al (1989); Brito (1987); Carle & Wighton (1990); Cassola & Werner (2004); Darling & Sharkey (1990); Demoulin (1955); Engel & Chatzimanolis (2005); ; Fleck & Nel (2003); Fontes & Vulcano (1998); Freitas et al, 2016;Goodwyn (2002); Gratshev & Legalov (2014); Grimaldi (1990Grimaldi ( , 2003Grimaldi ( , 2008; Grimaldi et al (2008); Haas (2007); Hamilton (1990); Heads (2008); Heads et al (2005); Jarzembowski et al (1998); Jattiot et al (2012); Jepson et al (2011); Krishna (1990); Krogmann et al (2013); Krzeminski et al 2015; Lee (2014Lee ( , 2016; Makarkin & Menon (2005; Martill & Nel (1996); Martins-Neto (1987b, 1988b, 1989ª, 1990ª, b, c, d, 1991ª, b, 1992ª, b, 1994…”

New species of Myrmicium Westwood (Psedosiricidae = Myrmiciidae: Hymenoptera, Insecta) from the Early Cretaceous (Aptian) of the Araripe Basin, Brazil

“…With regard to the insects in the Araripe Basin, the vast majority are restricted to the Crato Formation. Only one insect record is reported for the Romualdo Formation (Freitas et al 2016). Yet the entomofauna is badly underexplored, and there are still many families under analyses, represented by taxa yet unnamed within the Crato Formation (Bechly 2007, Barling et al 2013.…”