Tehuana diabolis (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 diabolis (Pretzmann, 1978)

Figs 8E , 9E

Pseudothelphusa (Tehuana) lamellifrons diabolis Pretzmann, 1978: 3.- Pretzmann 1980: 660, pl. 13, figs 56-60, pl. 17, fig. 77.- Rodriguez 1982: 210.

Tehuana diabolis. - Villalobos-Hiriart et al. 1993: 284 (list).- Alvarez and Villalobos 1994: 730, 735.- Álvarez and Villalobos 1997a: 416, 417, box 4.17 (list).- Álvarez and Villalobos 1997b: 438, appx. 4.23 (list).- Álvarez et al. 1999: 20, fig. 3 (map), 23, box 3 (list).-Villalobos and Alvarez 2003: 228 (in key).-Villalobos and Álvarez 2008: 281, 298 (list).- Ng et al. 2008: 177 (list).-Villalobos and Alvarez 2010: 474, 477, fig. 11 (map).- Álvarez et al. 2011a: appx. VIII.20, p. 13 (list); 2012: 1078, box 1 (list).- Alvarez and Villalobos 2016: 254, tab. 8.1 (list).- Villalobos-Hiriart et al. 2019: 156, tab.1 (list).- Álvarez et al. 2020: 979, tab. 1 (list).

Material examined.

Mexico - Veracruz • 2 ♀, CL 8.2-13.5 mm, CW 12.4-20.2 mm; Municipality of Catemaco , Veracruz, Catemaco Lake, Playa Hermosa; 18°26'00"N, 95°04'60"W; alt. 351 m; 31 Aug. 1966; L. Holthuis, J. Cabrera leg.; CNCR 333. 3 ♂, CL 12.1-16.4 mm, CW 18.1-25.7 mm; Municipality of Catemaco , Catemaco Lake , El Zapotal; 18°25'00"N, 95°05'60"W; alt. 335 m; 18 Sep. 1954; A. Villalobos leg.; CNCR 334. 4 ♂, 6 ♀, CL 12.7-27.1 mm, CW 20.1-42.3 mm; Municipality of Catemaco , Catemaco Lake , Las Margaritas Stream; 18°22'04"N, 95°01'01"W; alt. 345 m; 4 Aug. 1994; M.E. Camacho leg.; CNCR 12956. 4 ♂, CL 12.1-23.4 mm, CW 17.7-38.1 mm; same locality as previous record; 6 Aug. 1994; F. Álvarez leg.; CNCR 12965. 1 ♂, CL 26.4 mm, CW 43.6 mm; same locality as previous record; 20 Apr. 2016; E. Moreno leg.; CNCR 34488. 1 ♂, 1 ♀, CL 12.9-74.6 mm, CW 11.9-44.7 mm; Municipality of Catemaco , 1 km S from Coyame; 18°25'50.6"N, 95°01'16"W; alt. 364 m; 6 Aug. 1994; J.L. Villalobos leg.; CNCR 12952. 2 ♀, CL 11.7-18.2 mm, CW 17.7-23.2 mm; same locality as previous record; 1 Aug. 1994; M.E. Camacho leg.; CNCR 12966. 2 ♀, CL 12.8-15.7 mm, CW 18.8-22.5 mm; Municipality of Catemaco , Catemaco Lake , La Agayota; 18°24'02"N, 95°00'06"W; alt. 545 m; 1 Jul. 1986; F. Álvarez leg.; CNCR 12907. 1 ♂, 4 ♀, CL 11.3-24.6 mm, CW 16.2-38.2 mm; same locality as previous record; 18 Jul. 1986; J.L. Villalobos leg.; CNCR 12911. 1 ♂, CL 13.1 mm, CW 20.1 mm; same locality as previous record; 4 Aug. 1994; F. Álvarez leg.; CNCR 12954. 1 ♀, CL 26.3 mm, CW 42.4 mm; same locality as previous record; 18 Jul. 1986; F. Álvarez leg.; CNCR 13125 .

Diagnosis.

G1 slender, proximal half cylindrical, distal half becoming compressed. In caudal view, apical crest widely concave, mesial crest higher than lateral one, Meso-distal lobe conical, tip rounded. In mesial view, distal third of gonopod slightly inclined cephalically, caudo-marginal projection bilobed, lobes separated by V-shaped notch, distal lobe shorter than proximal one, rounded; proximal lobe ax-shaped, cephalic margin broadly rounded, internal margin straight. In cephalic view, caudo-marginal projection slightly curved mesially, meso-distal lobe prominent; mesial process as a widely rounded plate, distal margin rounded, lateral margin with triangular tooth, cephalic margin with rounded projection closing the apical cavity. In lateral view, mesial process oblique relative to apical cavity longitudinal axis, mesial crest clearly higher than lateral one. In apical view, apical cavity U-shaped, opening of sperm channel in caudal position, field of apical pore setae on lateral portion of cavity, caudal crest thicker than the rest.

Type material.

The holotype (NHMW 4068) and paratypes (NHMW 4069) are deposited in the Natural History Museum in Vienna, Austria.

Type locality.

México, Veracruz, Municipality of Catemaco, Catemaco Lake; 18°25'00"N, 95°06'00"W; alt. 325 m ( Pretzmann 1980).

Distribution.

Only known from the north and eastern shores of Catemaco Lake, Veracruz, Mexico (Fig. 1 ).

Remarks.

A diagnosis, based on the description of G1 is provided for T. diabolis since Pretzmann (1980) description and subsequent mentions of the species by other authors omitted important morphological details of G1. In Tehuana diabolis G1 the proximal lobe of the caudo-marginal projection has an intermediate shape between those of T. veracruzana and T. poglayenorum (Fig. 8 ), and in the phylogenetic tree the three species appear also closely related (Fig. 3 ). Geographically, T. diabolis distribution around Lake Catemaco is also between that of T. poglayenorum to the northeast and that of T. veracruzana to the south of Catemaco Lake in the town of Zapoapan de Cabañas.

Figures

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

Figure 3. Phylogenetic tree obtained for the genus Tehuana based on the concatenated analysis of three genes (H 3, 16 S, COI), using maximum likelihood and Bayesian inference. Branch supports values are posterior probability / bootstrap. Only clades with branch support above 50 % indicated. Clades a, b, and c are labelled for discussion purposes.

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).