Itararecarcinia Cardoso, Bento & Ferreira, 2025, n. gen.

Itararecarcinia n. gen. urn:lsid:zoobank.org:act: D800FEB3-7CB3-490E-BFA5-DFF2806CC852 Type species: Itararecarcinia yapyra n. sp. Diagnosis Head shield trapezoidal, wider than long, slender than pleotelson. Pleon length about 40% of body length; pleonites I and II reduced but dorsally visible, not covered by pereonite VII, forming a gap between pereon and pleon. Pleotelson about 25% of body length and 60% of pleon length. Genital papilla bilobed. Pleopods III – V expanded, round shaped with two plumose setae proximally, on medial margin. Etymology The name Itararecarcinia is derived from the Indigenous Tupi-Guarani language. “Itãrere” means water that originates in stone and flows down a rock. This is in reference to the resurgence where the species were discovered. Additionally, the name incorporates the Greek word “carcinia” meaning small shrimp. Gender feminine. Taxonomic remarks As Oiticicarcinia n. gen., Itararecarcinia n. gen. is placed in the family Calabozoidae. Itararecarcinia n. gen. differs from Oiticicarcinia n. gen. by the body shape, with the head shield narrower than the pleotelson (versus wider than the pleotelson); the pleonites I and II not covered by pereonite VII with pereon and pleon line not continuous (versus covered by pereonite VII with a continuous line between pereon and pleon). Itararecarcinia n. gen. and Oiticicarcinia n. gen. are similar in the shape of the genital papilla that is bilobed. Itararecarcinia n. gen. is similar to Pongycarcinia and Calabozoa in the head shield shape that is narrower than the pleotelson; but also differs in body shape that is also continuous in Pongycarcinia and Calabozoa. Moreover, the round shape of pleopods III – V in Itararecarcinia n. gen. resembles Pongycarcinia, contrasting with the oval shape observed in Calabozoa and the subrectangular shape of Oiticicarcinia n. gen.