Mastigoproctus cinteotl, Barrales-Alcala, Francke & Prendini, 2018

Barrales-Alcalá, Diego, 2018, Systematic Revision Of The Giant Vinegaroons Of The Mastigoproctus Giganteus Complex (Thelyphonida: Thelyphonidae) Of North America, Bulletin of the American Museum of Natural History 2018 (418), pp. 1-64 : 37

Mastigoproctus cinteotl , sp. nov.

Mastigoproctus giganteus: Reddell and Mitchell, 1971a: 145 , fig. 18; 1971b: 185; Reddell and Elliott, 1973: 183; Rowland and Reddell, 1976: 3, 4; Cokendolpher and Bryce, 1980: 18; Reddell, 1981: 124; Palacios et al., 2014–2015: 32.

TYPE MATERIAL: MEXICO: Tamaulipas: Municipio Gómez Farías : Holotype ♂ ( CNAN T1149 ), subad. ♂ paratype ( CNAN T 01040), 1 km N Mirador Camino de Alta Cima, 23°03′12.78″N 99°10′45.32″W, 763 m. 20.iv.2016, J. Arreguín, G. Contreras, D. Guerrero, R. Monjaraz, G. Montiel and J. López; paratype ♂, paratype ♀ ( AMNH), 8 mi. NW Gómez Farías, 1–5. vi.1964, J. Reddell, D. McKenzie, and L. Manire.

ETYMOLOGY: This new species is named after the Aztec god Cinteotl, responsible for providing the first corn seeds to their ancestors. The Mexican state of Tamaulipas was an important center for the domestication of corn ( McClung de Tapia et al., 2001). The name is a noun in apposition.

DIAGNOSIS: Mastigoproctus cinteotl , sp. nov., resembles M. giganteus and M. floridanus , from which it differs as follows. Spines S3 and S4 on the prodorsal margin of the pedipalp trochanter are equal, and S4 and S5 are subequal in M. cinteotl , whereas S3 and S4 are unequal, and S5 shorter than S4, in M. giganteus ; and S3 is longer than S4, and S4 and S5 subequal, in M. floridanus . The punctures on the retrolateral surface of the pedipalp femur are markedly cristulate, providing a rugose texture in M. cinteotl , whereas the punctures are weakly cristulate in M. floridanus . Sternite V is smooth in the adult male of M. cinteotl , but possesses a patch of fine macrosetae in M. giganteus and M. floridanus .

DESCRIPTION: The following description is based on two males and one female.

Total length: Maximum length from anterior margin of carapace to posterior margin of opisthosomal segment XII (pygidium) in adult specimens 65.8 mm (♂) and 53.9 mm (♀) (table 4).

Color: Carapace dark brown, anterior margin blackish. Tergites I–IX dark brown, posterior and lateral margins black. Sternites I–VIII dark reddish brown, lateral margins blackish. Sternite IX blackish, lateral and posterior margins black. Pygidium, dorsal and ventral surfaces dark reddish brown. Flagellum dark brown, segments with dark brown macrosetae. Pedipalp trochanter