Open AccessNew data on Beurlenia araripensis Martins-Neto & Mezzalira, 1991, a lacustrine shrimp from Crato Formation, and its morphological variations based on the shape and the number of rostral spines
Author(s) -
Olga Alcântara Barros,
Maria Somália Sales Viana,
Bartolomeu C. Viana,
João Hermínio da Silva,
Alexandre Rocha Paschoal,
Paulo Víctor de Oliveira
Publication year - 2021
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0247497
Subject(s) - rostrum , caridea , biology , shrimp , cretaceous , extant taxon , spine (molecular biology) , zoology , freshwater shrimp , anatomy , crustacean , paleontology , fishery , decapoda , evolutionary biology , genus , microbiology and biotechnology
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 .