Tulumella unidens Bowman & Iliffe, 1988

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

Tulumella unidens Bowman & Iliffe, 1988 Figure 2A

Material examined.

4 individuals; Cenote Cervera, depth 25.6-26.2 m, cave, in hydrogen sulfide layer, around and below halocline, 26 °C, Yalsihom, Yucatan, Mexico; 8 May 2016; colls. D. Angyal & E. Chávez Solís. 4 individuals; Cenote Sabtun 1, depth 24.0-25.0 m, cavern, above and around halocline, 25 °C, Chunchumil, Yucatan, Mexico; 10 December 2017; colls. D. Angyal, E. Chávez Solís, S. Drs, Q. Hernández & S. Reyes.

Previous distribution.

Iliffe 1992; Iliffe 1993; Bowman and Iliffe 1988; Rocha et al. 1998; Pohlman et al. 2000; Pesce and Iliffe 2002; Álvarez et al. 2015; Olesen et al 2015; Benítez et al. 2019.

Type locality is Cenote Naharon (Cristal) in Quintana Roo. This species had only been reported from Quintana Roo from cenotes Calavera (Temple of Doom), Mayan Blue, Actun Ha (Carwash), Muknal, Na’ach Wennen Ha, Bang, Odyssey, Tabano, and Quebrada.

Remarks.

Our findings extend the distribution area of this thermosbaenacean, previously endemic to Quintana Roo, to the cenotes located in the coastal areas north of Dzilam de Bravo and the east of Celestun. It is most likely that this species has a coastal distribution along the anchialine systems of the Yucatan Peninsula. Previous records were reported from cenotes located 2-10 km from the coastline near Tulum, where they occurred mostly above and at the halocline ( Álvarez & Iliffe 2008; Álvarez et al. 2015; Benítez et al. 2019). In Cenote Cervera, 3.6 km inland from the northern coast of the Yucatan Peninsula, we observed individuals both above and below the halocline, as well as in the hydrogen sulfide layer.

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).