Hai loài cá mới thuộc giống channa (channidae, perciformes) được phát hiện ở ninh bình, việt nam

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Tác giả: Văn Hảo Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại: 597.1 Cold-blooded vertebrates Pisces (Fishes)

Thông tin xuất bản: TC Sinh học, 2011

Mô tả vật lý: 45521

Bộ sưu tập: Metadata

ID: 625614

Two news endemic locally species belong to genus Channa (Channidae, Perciformes) were discovered in Hoa Lu region, Ninh Binh province, including: 1. Channa hoaluensis Nguyen V. H. sp. novo: This species is distinguished with other non pelvic fin species in genus Channa are: deep arch mouth, the length of the mouth is greater than the width. The gap before the dorsal fin is larger than the gap before the pelvic fin. There are more than 60 lateral line scales, 56 -57 vertebrae. Gill rakers on the fisrt arch: 4 - 6. Long tongue, flat, thick, suck is arc, close to lower jaw, the back shape is tapering, occupies the width of mouth cavity. There are 7 - 8 crossed bracket strips. There is a black spot after the gill cover and above the source of pectoral fin. Source of caudal fin has a black eyelike spot. Fish distributes in the water area of Hoa Lu district, Ninh Binh province. 2. Channa ninhbinhensis Nguyen V. H. sp. novo: This species is similar to C. asiatica (Linnaeus, 1758) due to non pelvic fin. Shallow arch mouth, the length is smaller than the width. Starting point of dorsal fin is after starting point of pectoral fin. There are less than 60 lateral line scales, 49 - 53 vertabrae. 8-12 gill rakers on the first gill arch. This new species differs from Channa hoaluensis .n.sp are: The gap from starting point of dorsal fin to tip of snout is larger than 1/2 to caudal fin. The starting point of anal fin is closer to snout tip than to caudal fin. Short head (Lo = 4.09T). The distance between two eyes is large. Eyes are larger (T = 7.10), the tongue is flat, thick, tip of the tongue is arc and close to lower jaw, the back of tongue is gradually wide and occupies the width of oral cavity. Body is black grey without strip.
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