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© All rights reserved
Guenter Ellenberg

 

All translations into English by Matthias Naumann, Germany and Bill Kohler, Ohio-USA  

Ilyodon xantusi

English name:
Xantus' Ilyodon

Family:
Goodeidae JORDAN, 1923.

Subfamily:
Goodeinae JORDAN, 1923.

Original description:
HUBBS, C. L. & TURNER, C. L. (1939): Studies of the fishes of the order Cyprinodontes. 16. A revision of the Goodeidae. Misc. Publ. Mus. Zool. Univ. Mich., 42: p. 1-80.

Origin of the species name:
the name xantusi refers to Mr. John XANTUS.

Type locality:
Rio Colima, Haciendo Los Limones, 2 km southwest of Villa Alvarez; Colima, Mexico.

Meristic properties:
Dorsal fin = 14 - 17 (usually 15) rays;
Anal fin = 11 - 14 (usually 13) rays;
Ventral fin = 6 rays;
Pectoral fin = 14 rays.

 

The breeding of this species is without difficulty. At birth the fry are approx. 2 cm long and they are completely ignored by the older fish.

The highest number of living offspring from one birth that I know was 111. In this case a full-grown female of about 10 cm length delivered them. Another female, equal in size, delivered "only" 43 young about the same time; however, these were nearly the double size of the young from the other spawn.

Particularly astonishing is that both females had only stillbirths up to that time.

 

306-Ilyodon xanthusi 05 Scott
Ilyodon furcidens - xantusi head view
Photo by: Scott

 

 

305-Ilyodon xantusi 04 Scott
Ilyodon furcidens - xantusi tail fin view
Photo by: Scott

 

 

304-Ilyodon xantusi 02 J Sabisch
Ilyodon furcidens - xantusi, female
Photo by: Joern Sabisch

 

 

303-Ilyodon xantusi 01 J Sabisch
Ilyodon furcidens - xantusi, male
Photo by: Joern Sabisch