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No image available for this species; drawing shows typical species in Poeciliidae.
Mexico country information
Common names:
Southern mountain swordtail
Occurrence:
native
Salinity:
freshwater
Abundance:
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Ref:
Importance:
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Aquaculture:
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Regulations:
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Uses:
no uses
Comments:
Type locality, Rio Cahuitepec, upper Rio del Sol, Rio Coatzacoalcos basin, Oaxaca (UNAL 15256, holotype of X. monticolus). Known from Upper Rio del Sol (Rio Sarabia drainage); upper Rio Aguacatengo near Loma Santa Cruz and Rio San Miguel (Rio Jaltepec drainage); all in Rio Coatzacoalcos basin, Oaxaca, Mexico (Ref. 52914).
National Checklist:
Country Information:
https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mx.html
National Fisheries Authority:
Occurrences:
OccurrencesPoint map
Main Ref:
Kallman, K.D., R.B. Walter, D.C. Morizot and S. Kazianis, 2004
National Database:
> Cyprinodontiformes (Rivulines, killifishes and live bearers) > Poeciliidae (Poeciliids) > Poeciliinae
Etymology: Xiphophorus:Greek, xiphos = sword + Greek, pherein = to carry (Ref. 45335); monticolus:Name derived from Latin for a dweller in the mountains, referring to the species' restricted range to headwater streams inside the Sierra Madre.
Environment: milieu / climate zone / نطاق العمق / distribution range البيئة
; المياه العذبة محيطي; نطاق العمق 2 - 3 m (Ref. 52914). Tropical
النضج: Lm? range ? - ? cm Max length : 5.0 cm SL ذكر/ مختلط الجنس; (Ref. 52914); 6.4 cm SL (female)
وصف مختصر مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
A species characterized by a longer caudal appendage, sword index 0.25; fainter orange stripes that fade in older individuals and pronounced melanophore pigmentation at the edges of the dorsal and ventral sword margins (in males) (Ref. 52914). Body shape (shape guide): fusiform / normal.
This species occurs sympatrically with X. mixei and apparently prefers deeper pools; in rapidly flowing river with boulders and riffles (Ref. 52914).
Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Kallman, K.D., R.B. Walter, D.C. Morizot and S. Kazianis, 2004. Two new species of Xiphophorus (Poeciliidae) from the Isthmus of Tehuantepec, Oaxaca, Mexico, with a discussion of the distribution of the X. clemenciae clade. Am. Mus. Novit. 3441:1-34. (Ref. 52914)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Phylogenetic diversity index (مرجع 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00454 - 0.02306), b=3.14 (2.95 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
مستوى غذائي (مرجع 69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
المرونه (مرجع 120179): وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100). 🛈
