Stygiomysis cokei Kallmeyer & Carpenther, 1996

Angyal, Dorottya, Chavez-Solis, Efrain M., Lievano-Beltran, Luis A., Magana, Benjamin, Simoes, Nuno & Mascaro, Maite, 2020, New distribution records of subterranean crustaceans from cenotes in Yucatan (Mexico), ZooKeys 911, pp. 21-49 : 21

Stygiomysis cokei Kallmeyer & Carpenther, 1996 Figure 2B

Material examined.

1 individual; Cenote Tres Oches, depth 21.6 m, cave, freshwater, 27 °C, Homun, Yucatan, Mexico; 5 June 2016; colls. D. Angyal & E. Chávez Solís. 2 individuals, Cenote San Elias, depth 28.2 m and 32.0 m, cavern, freshwater, 26 °C, Homun, Yucatan, Mexico; 19 November 2017; colls. D. Angyal, E. Chávez Solís, S. Drs & L. Liévano. 2 individuals; Dzonotila, depth 20.8 m and 28.0 m, cavern, freshwater, 27 °C, Mucuyche, Yucatan, Mexico; 20 November 2017; colls. D. Angyal, E. Chávez Solís, S. Drs & B. Magaña. 1 individual; Yax-Kis, depth 12.1 m and 27.0 m, cave, freshwater, 27 °C, Mucuyche, Yucatan, Mexico; 27 January 2018; colls. D. Angyal, S. Drs & L. Liévano.

Previous distribution.

Kallmeyer and Carpenter 1996; Pesce and Iliffe 2002; Álvarez and Iliffe 2008; Álvarez et al. 2015; Benítez et al. 2019.

Type locality is Cenote Calavera (Temple of Doom) in Quintana Roo. Further known localities in Quintana Roo are cenotes Mayan Blue, Naharon (Cristal), Escondido, Actun Ha (Carwash), Actun Ko, Na’ach Wennen Ha, Muknal and Tabano. From Yucatan the species was known from cenotes Papakal, San Eduardo, Kankirixche, Yaal Utsil and Dzonotila.

Remarks.

Our records show that this species is distributed in cenotes of central Yucatan and along the Ring of Cenotes. Among the two Stygiomysis species of the region, S. cokei proved to be rarer than Stygiomysis cf. holthuisi . New occurrences were recoded between 12-32 m deep in freshwater. In cenotes San Elias, Dzonotila and Yax-Kis it co-occurred with S. cf. holthuisi . Previously the species had also been reported in brackish habitats ( Álvarez and Iliffe 2008; Álvarez et al. 2015).

Figures

Figure 2. A Tulumella unidens (Thermosbaenacea) B Stygiomysis cokei (Stygiomysida) C Stygiomysis cf. holthuisi (Stygiomysida) D Antromysis cenotensis (Mysida) E Mayaweckelia troglomorpha (Amphipoda) F Mayaweckelia cenoticola (Amphipoda) G Tuluweckelia cernua (Amphipoda). Scale bars: 1 mm (A, C, D, F, G); 10 mm (B, E).