Tehuana poglayenorum (Pretzmann, 1978)

Moreno-Juarez, Eric G., Villalobos, Jose Luis & Alvarez, Fernando, 2022, Revision of the freshwater crabs of the genus Tehuana Rodriguez & Smalley in Smalley 1970 (Decapoda, Pseudothelphusidae), with the descriptions of two new species, ZooKeys 1117, pp. 1-35 : 1

Tehuana poglayenorum (Pretzmann, 1978)

Figs 8I , 9I

Pseudothelphusa (Tehuana) lamellifrons poglayenorum Pretzmann, 1978: 3; 1980: 660, pl. 12, figs 51-55.

Tehuana poglayenorum .- Villalobos-Hiriart et al. 1993: 284 (list).- Álvarez and Villalobos 1997a: 416, 417, box 4.17 (list); 1997b: 338, appx. 4.23 (list).- Álvarez et al. 1999: 20, fig. 3 (map), 23, box 3 (list).-Villalobos and Alvarez 2003: 228 (in key).- Villalobos Hiriart and Álvarez 2008: 283, 298 (list).-Villalobos and Alvarez 2010: 475, 477, fig. 11 (map).- Álvarez et al. 2011a: appx. VIII.20, p. 13 (list); 2012: 1078, box 1 (list).- Cumberlidge et al. 2014: 147, tab. 7 (list).- Alvarez and Villalobos 2016: 254, tab. 8.1 (list).- Villalobos-Hiriart et al. 2019: 156, tab.1 (list).

Tehuana poglayenora .- Ng et al. 2008: 177 (list) [error].

Tehuana lamellifrons .- Poettinger et al. 2016: 1722, tab. I (list).

Material examined.

Mexico - Veracruz • 4 ♂, CL 11.4-26.0 mm, CW 17.0- 41.2 mm; Municipality of San Andrés Tuxtla, Basura River; 18°31'55"N, 95°03'30"W; alt. 33 m; 19 Jul. 1998; R. Robles, C. Graham leg.; CNCR 17422. 1 ♀, CL 15.8 mm, CW 22.9 mm; same locality as previous record; 18 Jul. 1986; J.L. Villalobos, F. Álvarez leg.; CNCR 13140. 3 ♂, 5 ♀, CL 8.9-28.8 mm, CW 13.1-45.2 mm; same locality as previous record; 4 Oct. 1994; J.L. Villalobos, F. Álvarez leg.; CNCR 13187. 7 ♂, 1 ♀, CL 9.6-21.8 mm, CW 14.7-36.4 mm; same locality as previous record; 24 Apr. 2017; J.L. Villalobos, I.A. Toledano, E. Moreno leg.; CNCR 33931. 4 ♂, 11 ♀, CL 11.8-19.5 mm, CW 12.8-33.2 mm; Municipality of Santiago Tuxtla , Tapalapan River ; 18°32'00"N, 95°18'00"W; alt. 393 m; 17 Apr. 1957; H. Hobbs, A. Villalobos leg.; CNCR 336. 5 ♀, CL 25.1-36.1 mm, CW 40.6-59.1 mm; same locality as previous record; 23 May 1955; A. Villalobos leg.; CNCR 338. 4 ♂, 4 ♀, CL 7.3-14 mm, CW 10.8-20.3 mm; same locality as previous record; 17 April 1957; H. Hobbs, A. Villalobos leg.; CNCR 386. 2 ♂, CL 10.9-11.9 mm, CW 12.4-18.8 mm; Municipality of San Andres Tuxtla , Otapan River ; 18°26'00"N, 95°12'00"W; alt. 379 m; 22 Sep. 1955; G. Pérez leg.; CNCR 337. 2 ♂, CL 11.9-20.7 mm, CW 21.9-30.3 mm; Municipality of San Andres Tuxtla , Laguna Escondida; 18°35'00"N, 95°05'00"W; alt. 76 m; 1 Aug. 1985; J.L. Villalobos, M.D. Valle, P. Schmidtsdorf leg.; CNCR 4473. 15 ♂, 10 ♀, CL 7.4-21.7 mm, CW 10.4-34.9 mm; same locality as previous record 13 Jun. 1985; C. Nates, J.L. Villalobos leg.; CNCR 4709. 1 ♂, 3 ♀, CL 8.2-25.6 mm, CW 11.6-41 mm; same locality as previous record; 11 Jul. 1994; J.L. Villalobos, F. Álvarez leg.; CNCR 5303. 4 ♂, 3 ♀, CL 25.4-32.3 mm, CW 42.2-53.2 mm; same locality as previous record; 24 Feb. 1989; M. Santiago leg.; CNCR 10220. 2 ♂, 2 ♀, CL 11-19.4 mm, CW 15.5-30.5 mm; same locality as previous record; 17 Jul. 1985; J.L. Villalobos, F. Álvarez leg.; CNCR 12908. 6 ♂, 4 ♀, CL 11.7-18.7 mm, CW 17.7-45.9 mm; same locality as previous record; 5 Aug. 1994; J.L. Villalobos leg.; CNCR 12964. 2 ♂, 2 ♀, CL 6.8-11.3 mm, CW 9.3-17.0 mm; same locality as previous record; 10 Jul. 1986; F. Álvarez leg.; CNCR 13138. 1 ♂, CL 20.0 mm, CW 32.3 mm; Municipality of San Andres Tuxtla , Playa Escondida; 18°35'00"N, 95°03'00"W; alt. 6 m; 28 Feb. 1986; A. Cantú leg.; CNCR 5782. 3 ♂, 5 ♀, CL 13.3-17.2 mm, CW 20.0-27.0 mm; same locality as previous record; 28 Feb. 1986; A. Cervantes, J. García, A. Cantú leg.; CNCR 5788. 1 ♂, 4 ♀, CL 9.2-20.9 mm, CW 13.1-32.1 mm; same locality as previous record; 28 Feb. 1986; R. Lamothe leg.; CNCR 8821. 6 ♂, 11 ♀, CL 6.3-20.8 mm, CW 9.1-32.8 mm; Municipality of San Andres Tuxtla , trail to Laguna Escondida; 18°35'00"N, 95°04'00"W; alt. 108 m; 24 Feb. 1989; M. Santiago leg.; CNCR 10222. 1 ♂, 2 ♀, CL 11.8-21.7 mm, CW 17.3-35.1 mm; same locality as previous record; 3 Aug. 1994; F. Álvarez, J.L. Villalobos leg.; CNCR 12967. 9 ♂, 5 ♀, CL 9.7-28.6 mm, CW 14.3-49.7 mm; same locality as previous record; 23 Apr. 2017; J.L. Villalobos, I.A. Toledano, E. Moreno leg.; CNCR 33927. 13 ♂, 21 ♀, CL 9.9-30.0 mm, CW 14.7-50.4 mm; Municipality of San Andres Tuxtla , Lázaro Cárdenas; 18°34'00"N, 95°06'00"W; alt. 359 m; 9 Jul. 1991; A. Cruz leg.; CNCR 12302. 1 ♂, CL 20.3 mm, CW 32.3 mm; Municipality of San Andres Tuxtla , Cuetzalapan River ; 18°24'00"N, 95°00'00"W; alt. 220 m; 13 Jul. 1986; F. Álvarez leg.; CNCR 12555. 2 ♂, 1 ♀, CL 11.3-23.6 mm, CW 18.0- 37.7 mm; Municipality of San Andres Tuxtla , La Palma River ; 18°33'00"N, 95°03'00"W; alt. 77 m; 12 Jul. 1986; F. Álvarez leg.; CNCR 12896. 1 ♂, 1 ♀, CL 21.1-23.0 mm, CW 35.0- 38.5 mm; Balzapote River ; 18°36'00"N, 95°04'00"W; alt. 54 m; Municipality of San Andres Tuxtla , Veracruz; 14 Jul. 1986; F. Álvarez leg.; CNCR 12906. 7 ♂, 3 ♀, CL 13.0- 20.3 mm, CW 20.0- 32.5 mm; Municipality of San Andrés Tuxtla, Máquinas River; 18°37'00"N, 95°05'00"W; alt. 143 m; 1 Aug. 1994; F. Álvarez, J.L. Villalobos leg.; CNCR 12961. 1 ♂, 2 ♀, CL 10.1-18.3 mm, CW 16.1-21.6 mm; Municipality of San Andres Tuxtla , Zacatal Lagoon; 18°35'00"N, 95°06'00"W; alt. 263 m; 14 Oct. 1994; F. Álvarez, J.L. Villalobos leg.; CNCR 13188. 4 ♂, CL 11.8-23.4 mm, CW 17.5-37.2 mm; Municipality of Santiago Tuxtla , Simapan River ; 18°27'00"N, 95°21'00"W; alt. 336 m; 3 May 1995; J.L. Villalobos leg.; CNCR 13346 .

Diagnosis.

G1 slender, in mesial view distal third inclined cephalically. Meso-distal lobe conical, tip rounded, large relative to size of other apical structures (Fig. 9I ). Mesial process well developed; lateral margin with triangular, acute tooth; distal margin broadly rounded; internal angle with triangular projection in cephalic position. Lobes of the caudo-marginal projection elongated, overlapping along most of their length; proximal lobe curved cephalically, distal lobe straight, oriented forward or with the tip moderated curved proximally, slightly longer than proximal one. In mesial view, distal lobe with superior margin inclined proximally; distally, falling over proximal lobe. Internal carina of proximal lobe rounded, prominent, separated from lobe. Apical cavity with elongated field of setae, opening of spermatic channel in caudal position.

Type material.

The holotype (NHMW 4066) and paratypes (NHMW 4067) are deposited in the Natural History Museum in Vienna, Austria.

Type locality.

Mexico, Veracruz, Municipality of San Andrés Tuxtla, Basura River; 18°32'00"N, 95°03'00"W; alt. 33 m (Pretzmann, 1978).

Distribution.

Tehuana poglayenorum is distributed in the north-central section, of the Los Tuxtlas region.

Remarks.

Tehuana poglayenorum is the most widely distributed and abundant freshwater crab in the whole Los Tuxtlas Mountain Range. It belongs to clade c, where all the species from Los Tuxtlas are grouped (Fig. 1 ). We noted there small morphological variations through its distribution range: in the carapace with setae or without them, and in the G1 in the caudo-marginal projection and mesial process.

Poettinger et al. (2016) presented the sequence of the16S mitochondrial gene (KU578859) as belonging to T. lamellifrons ; however, the two females in the lot NHMW 4067 (from Río Basura, state of Veracruz) are the paratypes of T. poglayenorum designated by Pretzman (1978, 1980). |

Figures

Figure 1. Distribution of the species of the genus Tehuana in southeastern Mexico.

Figure 8. Mesial view of the apical portion of the G 1 of the species of Tehuana A T. ayotzintepecensis sp. nov., CNCR 34628 B T. chontalpaensis, CNCR 17093 C T. col sp. nov., CNCR 33928 D T. complanata, CNCR 11957 E T. diabolis, CNCR 12056 F T. lamellifrons, CNCR 33939 G T. lamothei, CNCR 8812 H T. jacatepecensis, CNCR 11920 I T. poglayenorum, CNCR 33931 J T. veracruzana, CNCR 33934. Scale bars: 1 mm.

Figure 9. Cephalic view of the apical portion of the G 1 of the species of Tehuana A T. ayotzintepecensis sp. nov., CNCR 34628 B T. chontalpaensis, CNCR 17093 C T. col sp. nov., CNCR 33928 D T. complanata, CNCR 11957 E T. diabolis, CNCR 12056 F T. lamellifrons, CNCR 33939 G T. lamothei, CNCR 8812 H T. jacatepecensis, CNCR 11920 I T. poglayenorum, CNCR 33931 J T. veracruzana, CNCR 33934. Scale bars: 1 mm (A, C, H, J); 0.5 mm (B, D, E, F, G, I).