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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Goodeidae (Splitfins) > Goodeinae
Etymology: Xenotoca: Greek, xenos = strange + Greek, tokos, oy = birth (Ref. 45335); lyonsi: Named for Dr. John Lyons, who has made substantial contributions to the understanding of the distribution, ecology, diversity, and conservation status of fishes in Mexico, and to goodeids in particular. An adjective.
Eponymy: Dr John D Lyons is an American fish biologist and ichthyologist who is Curator of Fishes at the University of Wisconsin Zoological Museum and was Fisheries Research Supervisor for the Wisconsin Department of Natural Resources (1986–2017). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; air tawar bentopelagis. Tropical
Central America: endemic tothe Coahuayana River drainage in Jalisco, Mexico.
Size / Weight / umur
Maturity: Lm ? range ? - ? cm
Max length : 5.5 cm SL jantan/; (Ref. 117630); 5.0 cm SL (female)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
duri punggung lunak (Keseluruhan (total)) : 12 - 14; Sirip dubur lunak: 13 - 14. Xenotoca lyonsi differs from the congeners occurring in the Pacific Coast drainages by the combination of the following characters (none unique to the species): females posses 13 dorsal rays (vs. 15 or 16 in X. melanosoma and 14 in X. doadrioi); for males and females the differences are as follows: 14 anal fin rays (vs. 15 or 16 in X. melanosoma), 12 pectoral fin rays (vs. 13 in Xenotoca eiseni), 8 caudal peduncle scales (vs. 9 in Xenotoca eiseni and X. melanosoma), 30-31 scales in a lateral series (vs. 32 in X. doadrioi), 9 transversal scales (vs. 11 or 12 in X. eiseni and X. doadrioi) and 11 suparorbital pores (vs. 10 in X. doadrioi). Both male and female have a smaller eye diameter (head lengthL/ eye diameter = 3.7 vs. 3.0 in X. doadrioi and 3.5 in X. eiseni for females, and head length/ eye diameter= 3.6 vs. 3.3 in X. eiseni in males), high dorsal fin base (standard length /dorsal fin base length = 6.5 vs. 6.9 in X. eiseni for females and and 5.5 vs. 5.9 in X. eiseni in males) (Ref. 117630).
The type locality where the this species occurs is characterized by high seasonal changes in water clarity and volume, from a turbid and deep high flow running water in the rainy season to clear and low flow water other times of the year, sometimes reduced to a few shallow pools in the dry season. Its bottom is composed mainly of mud and gravel, and water plants are only evident in the stream bed. Other fishes present in the area include Xenotoca melanosoma (now extirpated), Ilyodon whitei, Poecilia butleri, Allodontichthys tamazulae, Astyanax anaeus, Cyprinus carpio and Oreochromis sp. (Ref. 107630).
Life cycle and mating behavior
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fecundity | Larva
Domínguez-Domínguez, O., D.M. Bernal-Zuñiga and K.R. Piller, 2016. Two new species of the genus Xenotoca Hubbs and Turner, 1939 (Teleostei; Goodeidae) from the central-western Mexico. Zootaxa 4189(1):81-98. (Ref. 117630)
Status IUCN Red List (Ref. 130435: Version 2024-2)
ancaman kepada manusia
Harmless
penggunaan manusia
Perikanan: tidak ada kepentingan
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.0 ±0.1 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
