Rivulus ornatus


Species:	Rivulus ornatus
Description:	Garman, 1895
Etymology:
References:	Dr Lothar Seegers, Killifishes of the World: New World Killis, Aqualog Verlag pg 149 Costa, W.J.E.M.; Rivulus uakti sp. n. and R. amanapira sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new species from the upper Rio Negro, Brazilian Amazonia; Zootaxa 465: 1-12 (2004)

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Abstract:	Member of the Rivulus atratus species group, that includes Rivulus amanapira, Rivulus atratus, Rivulus ornatus, Rivulus rectocaudatus, Rivulus romeri, Rivulus tecminae and Rivulus uakti.
Synonyms:
Type Locality:
Distribution:
Biotope:	Rivulus ornatus was captured on Padre Isla, the Amazon river near Iquitos. It is found in shallow drying lakes ("cochas") as well as in deeper lakes, where they are frequently found in the vegetation near the edges. This species appears to live in small groups. Some of these "cochas" are permanently connected to the Amazon river. During the period of high water, they are reconnected to the river currents and can become several meters deep. In some years, the islands are completely submerged by the floods. The water of the cochas is somewhat hard, with a neutral or slightly alkaline pH. Young Pterolebias peruensis were also found in the drying cochas. Also found at Quisto Cocha lake lake, situated 15km to the southwest of Iquitos. The lake is bordered by a marshy zone containing characteristic marshy vegetation. The marsh is criss-crossed by small creeks. In the marsh proper, there are small pools of water that are only a few centimeters deep rising to 10 to 20cm when it rains. Here the sympatric Rivulus rectocaudatus and Rivulus rubrolineatus are to be found. This is also the place where the only specimen of Rivulus sp. "Quisto Cocha" was found.
Size:	4 cm
Characteristics:	This species has a small body with a long lanceolate caudal fin, very similar in appearance and morphology to Rivulus speciosus. The males have flanks covered in red spots on a light background. They can easily be distinguished from Rivulus speciosus by colour. The body size of both species (less than 40mm) and their morphology evidently don't place them in any particular group.
Variations:
History:
Gallery:
Populations:	"Iquitos" "Padre Isla" 2001 "Padre Isla" GMC 01/8 (F1 at KT Congreso 2004) "Padre Isla" Iquitos 96 "Pebas" "Quisto Cocha"
Breeding:
Incubation:
Egg Diameter:
Remarks:
Contributors:
Links:	FishBase o Google o Google Image Search
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