searchable PDF - Association for Mexican Cave Studies

Cienegas basin, central Coahuila, Mexico. Untilnow it has been known only from the type-locality.The Texas specimens fit Cole and Minckley's descriptionexcept for some minor details as follows:The uropods are slightly longer than the pleotelson.In M. coahuila they are distinctly shorter.The pleotelson has a few dorsal setae not shownby Cole and Minckley.On the exopod of the male pleopod 1 the distomedialsetae are much longer than the distolateralsetae. In Cole and Minckley's Fig. 24 they are onlyslightly longer. But in one of their paratypesmounted on a slide the medial setae are muchlonger.The arrangement of setae on the exopod of pieopod3 is slightly different.The exopod of pleopod 5 is unarmed in theMexican specimens; in the Texas specimens a seta ispresent on the suture between segments 1 and 2.The Mexican specimens were "bright red in life. "gf I •'I \III j r \~ 1LI.. ~I • I J L "'I /,Fig. l.-Mexislenasellus coahuila, a-b female, b-i male: a, antenna I, distal segments of flagellum; b, pereopod I; c, pleopod 2,anterior; d, pleopod 2, posterior; e, pleopod 1; f, pleopod 3; g, pleopod 4 exopod; h, pleopod 5 exopod.24