Abstract
Fossil freshwater carideans are very rare worldwide. Here, we present new taxonomic remarks about Beurlenia araripensis from the Early Cretaceous laminated limestones of the Crato Formation, Araripe Basin, northeastern Brazil. We analyzed five fossil samples, testing the morphological variations such as, rostrum with 5 to 14 supra-rostral spines and 2 to 3 sub-rostral spines, which appears as serrate for Caridea. This variation demonstrates a morphologic plasticity also seen in extant species of the group, such as those of the genera Macrobrachium and Palaemon.
Highlights
Among the crustacean fossil fauna worldwide, freshwater decapods are rare, especially in the Mesozoic [1]
The Romualdo and Crato formations of the Araripe Basin show the largest number of fossil shrimp species described for the Cretaceous, including carideans (Beurlenia araripensis Martins-Neto & Mezzalira, 1991, and Kellnerius jamacaruensis Santana, Pinheiro, Silva & Saraiva, 2013), sergestoids (Paleomattea deliciosa Maisey & Carvalho, 1995), luciferids (Sume marcosi Saraiva, Pinheiro & Santana, 2018), and penaeoids (Araripenaeus timidus Pinheiro, Saraiva & Santana, 2014, Priorhyncha feitosai Alencar, Pinheiro, Saraiva, Oliveira & Santana, 2018, and Cretainermis pernambucensis Prado, Calado & Barreto, 2019)
New data about Beurlenia araripensis from lower Cretaceous of the Araripe Basin dataset/Data_Availability_Statement_/13951607) and the figures used in the research
Summary
Among the crustacean fossil fauna worldwide, freshwater decapods are rare, especially in the Mesozoic [1]. The Romualdo and Crato formations of the Araripe Basin show the largest number of fossil shrimp species described for the Cretaceous, including carideans (Beurlenia araripensis Martins-Neto & Mezzalira, 1991, and Kellnerius jamacaruensis Santana, Pinheiro, Silva & Saraiva, 2013), sergestoids (Paleomattea deliciosa Maisey & Carvalho, 1995), luciferids (Sume marcosi Saraiva, Pinheiro & Santana, 2018), and penaeoids (Araripenaeus timidus Pinheiro, Saraiva & Santana, 2014, Priorhyncha feitosai Alencar, Pinheiro, Saraiva, Oliveira & Santana, 2018, and Cretainermis pernambucensis Prado, Calado & Barreto, 2019). New data about Beurlenia araripensis (crustacea, decapoda) from lower Cretaceous of the Araripe Basin dataset/Data_Availability_Statement_/13951607) and the figures used in the research (https:// figshare.com/articles/figure/New_data_on_ Beurlenia_araripensis_Martins-Neto_Mezzalira_ 1991/13623023)
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