Popenaias berezai Inoue et al., 2020

Inoue, Kentaro, Cummings, Kevin S., Tiemann, Jeremy S., Miller, Thomas D., Johnson, Nathan A., Smith, Chase H. & Randklev, Charles R., 2020, A new species of freshwater mussel in the genus Popenaias Frierson, 1927, from the Gulf coastal rivers of central Mexico (Bivalvia: Unionida: Unionidae) with comments on the genus, Zootaxa 4816 (4), pp. 457-490 : 464-466

Popenaias berezai Inoue et al. n. sp.

( Figs 5 , 6 , 7 , 8A , 9A )

Common name: Mexico Hornshell

Type locality: Río Valles (Gulf of Mexico—Río Pánuco—Río Tampaón), Estación Micos, 20 km NW of Ciudad Valles, San Luis Potosí, Mexico, 22.11417, -99.16166 .

Type specimens: Holotype: CNMO 8037 (ex. INHS 90397.5 ) . Paratypes: from the type locality, CNMO 8038 (3) , FMNH 344800 (3) , INHS 90397 (9) , NHMUK 20191101 (3) , NRI 9603 (3) , UF 548816 (3) , USNM 1617023 (3) ; Ri ́o Claro (Ri ́o Pánuco—Río Moctezuma—Río Amajac), 5.5 km SE of Tamazunchale, San Luis Potosí, Mex- ico, 21.22150, -98.75573 , INHS 90134 (3) ; Río Amajac (Río Moctezuma), 5.1 km SE of Tamazunchale, San Luis Potosí, Mexico, 21.22728, -98.75437 , CNMO 8039 (2) , FMNH 344801 (2) , INHS 90152 (10) , NHMUK 20191102 (2) , NRI 9604 (2) , UF 548817 (2) , USNM 1617024 (2) ; Ri ́o Huichihuaya ́n (Ri ́o Moctezuma), Huichihuayán, Ejido Tazaquil, San Luis Potosí, Mexico, 21.47269, -98.95768 , INHS 90167 (1) ; Ri ́o Tancuili ́n ( Río Moctezuma—Río Axtla), Jalpilla, 5.5 km S of Axtla de Terrazas, San Luis Potosí, Mexico, 21.39008, -98.87544 , CNMO 8040 (2) , FMNH 344802 (2) , INHS 90175 (9) , NHMUK 20191103 (2) , NRI 9605 (2) , UF 548818 (2) , USNM 1617025 (2) ; Río Tampaón ( Río Pánuco ), Álvaro Obregón (Pujal), at confluence of the ríos Valles and Tampaón, San Luis Potosí, Mexico, 21.84489, -98.94373 , INHS 90183 (12) ; Ri ́o Huichihuaya ́n ( Ri ́o Moctezuma), Rt. 120, 9 km WSW of Axtla de Terrazas, 12 km NNE of Xilitla, San Luis Potosí, Mexico, 21.43633, -98.93345 , INHS 90192 (2) ; Río Amajac (Río Moctezuma), Temamatla, San Luis Potosí, Mexico, 21.23664, -98.76189 , CNMO 8041 (5) , FMNH 344803 (5) , INHS 90199 (33) , NHMUK 20191103 (5) , NRI 9606 (5) , UF 548819 (5) , USNM 1617026 (5).

Figures

FIGURE 5. Right valve external views of Popenaias berezai n. sp. (A–F). (A) Holotype (CNMO 8037, ex. INHS 90397.5), 73 mm length, from the Río Valles, Estación Micos, 20 km NW of Ciudad Valles, San Luis Potosí, Mexico; (B) Paratype (INHS 90397.1), 62 mm, from the locality same as A; (C) Paratype (INHS 90183.3), 59 mm, from the Río Tampaón (Río Pánuco) Álvaro Obregón (Pujal), at confluence of the ríos Valles and Tampaón; (D) Paratype (INHS 90183.1), 67 mm length, from the locality same as C; (E) Paratype (INHS 90175.3), 53 mm, from the Río Tancuilin, 0.5 km south of Jalpilla, San Luis Potosí, Mexico; (F) Paratype (INHS 90175.2), 50 mm, from the locality same as E. White bar denotes 1 cm scale.

FIGURE 6. Right valve internal views of Popenaias berezai n. sp. Localities correspond to those of Fig. 5. (A) Holotype (CNMO 8037, ex. INHS 90397.5); (B) Paratype (INHS 90397.1); (C) Paratype (INHS 90183.3); (D) Paratype (INHS 90183.1); (E) Paratype (INHS 90175.3); (F) Paratype (INHS 90175.2). Scale bar 1 cm.

FIGURE 7. Soft anatomy of Popenaias berezai n. sp. Localities correspond to those of Fig. 5. (A) Holotype, non-gravid (CNMO 8037, ex. INHS 90397.5); (B) Paratype, gravid individual (INHS 90397.1); (C) Paratype, non-gravid (INHS 90183.3); (D) gravid individual (INHS 90183.1); (E) Paratype, non-gravid (INHS 90175.3); (F) Paratype, gravid individual (INHS 90175.2). Scale bar 1 cm.

FIGURE 8. Right valve external shells. (A) Popenaias berezai n. sp., Río Valles, San Luis Potosí, Mexico, Holotype CNMO 8037, ex. INHS 90397.5; (B) Popenaias ganina, Río Gallinas, San Luis Potosí, Mexico, Lectotype ANSP 99523a; (C) Popenaias popeii, Río Salado, Nuevo León, Mexico, Lectotype USNM 85895.

FIGURE 9. Presumptive historic and current distributional ranges of (A) Popenaias berezai n. sp. in Mexican Gulf coastal rivers, (B) Popenaias ganina in the Río Gallinas of the Río Pánuco basin, (C) Popenaias popeii in the Rio Grande basin of Mexico and the United States, and (D) Popenaias tehuantepecensis including Nephronaias rowellii (Lea, 1859) in Central America.