Mecynocypria Rome, 1962

Bisquert-Ribes, Maria, Rueda, Juan, Palero, Ferran, Savatenalinton, Sukonthip & Mesquita-Joanes, Francesc, 2023, Fig. 1 in Fig. 4 in Identification of Sexually Dimorphic Genes in Pectoral Fin as Molecular Markers for Assessing the Sex of Japanese Silver Eels ()., Zoological Studies 62 (40), pp. 1-24 : 5

Mecynocypria Rome, 1962

Physocypria (partim) Karanovic, 2011: 42 .

Type species: Mecynocypria obtusa ( Sars, 1910) ; Rome 1962.

Diagnosis (after Rome (1962)): Elongated carapace, height equal or less than half the length. RV margin without tubercles, LV overlap RV. A1 7-segmented, A2 with long natatory setae reaching beyond tip of terminal claws. Penultimate segment of male A2 divided, t2 and t3 setae transformed into sexual bristles. Terminal segment of Md palp elongated (> 2x longer than wide). Terminal segment of Mxl palp squared. Third endite of the Mxl with bristles. Male T 1 with asymmetrical prehensile palps. T 2 with basal d1-seta. Terminal segment of T 3 subquadrate, g-seta short or absent. CR well-developed, with sp-seta long or short, claws well-developed. Hemipenis with lobes a and b well-developed; a-lobe elongated, usually longer than b-lobe, and bent towards b-lobe. Zenker organ with seven spine whorls.

Other species: The list of Mecynocypria species and their synonyms can be found in Meisch et al. (2019).

Distribution: AT.

Remarks: Karanovic (2011) synonymized the genus Mecynocypria with Physocypria because of the position of the ovaries and the presence of the d1- seta on T 2. However, following Meisch et al. (2019), Mecynocypria differs from Physocypria because of the absence of marginal tubercles on the valves. We have provided here a new diagnosis for the genus based on Rome’s first description of the genus Mecynocypria but updating appendage nomenclature.