Critically Endangered
Cyprinodon julimes
Cyprinodon julimes
Cyprinodon julimes is a ray-finned fish in the family Cyprinodontidae (order Cyprinodontiformes), recorded as Critically Endangered.
Appearance
Its body is deep, the dorsal and ventral profile is convex and the lower jaw exceeds the premaxilla. The dorsal fin is placed forward with respect to the pelvic fin. Females and young have reticulate patterns of dark and light silver-brownish bands of varying lengths and thickness over the flanks, as well as a conspicuous black spot or ocellus on the distal edge of the dorsal fin.
Mature male 31.8 mm SL Paratypes.- UANL 18721 (39 specimens). TNHC39729 (2 specimens); USNM 391634 (2 specimens); UMMZ 248729 (2 specimens). Cyprinodon julimes was scientifically described in 2009 as similar to Cyprinodon eximius, but it has a bigger head, nearly one-third of its standard length.
Range and habitat
The Julimes pupfish inhabits sections of "El Pandeño" hot spring system in the municipality of Julimes, Chihuahua. Colors range from light green-blue to brownish-red. Faunal associates include a mix of endemic species in the following taxa: an undescribed poeciliid fish (Gambusia sp.) inhabiting the cooler sections of the system, the recently described cochliopid springsnail (Tryonia julimensis), and IUCN (CR) red listed sphaeromatid isopod (Thermosphaeroma macrura).
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Breeding
Dominant males establish territories of about 0.5 m (1.6 ft) in diameter around sunken branches, rocks or pieces of travertine from where they court passing females. Females that are ready to spawn cautiously enter the dominant male's territory, showing a courtship display directed at attracting the guarding male.
The eggs adhere to roots, aquatic vegetation, rocks, travertine or sunken objects and are abandoned to their fate.
In crisis
The species is listed as Endangered (P) in the Mexican Endangered Species NOM-059-SEMARNAT-2010. On September 28, 2010, the Mexican National Water Commission (CONAGUA) issued positive response to the request made by "Amigos del Pandeño", allowing them to use and manage the federal lands surrounding "El Pandeño" — officially known as "San José de Pandos" — thermal spring, for environmental purposes, for a ten-year term.
Cyprinodon julimes is Critically Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Cyprinodon julimes, Wikidata item Q5200403. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
