淮河水系沙塘鳢形态特征和分类地位初步研究

研究分析了淮河水系沙塘鳢(Odontobutis obscura)的形态特征,并对其分类地位进行了探讨。可数性状:背鳍Ⅶ,Ⅰ-9~10,尾鳍14~15,臀鳍Ⅰ-7~8,腹鳍Ⅰ-5,胸鳍14~15,纵列鳞36~41,横列鳞14~18,体侧感觉乳突线鳞28~30,第一鳃弓鳃耙数9~11,脊椎骨数28~29。可量性状:全长是体长(1.23±0.03)倍;体长是体高(3.82±0.45)倍,是头长(3.08±0.49)倍,是尾柄长(5.19±0.54)倍,是消化道长(1.86±0.52)倍,是肠长(6.99±2.86)倍;头长是吻长(2.94±0.42)倍,是眼径(6.09±0.87)倍,是眼间距(3.86±0.61)倍,是口裂宽(1.94±0.27)倍;体高是体厚(0.96±0.11)倍;尾柄长是尾柄高(1.66±0.18)倍。

Preliminary Study on Morphological Character and Taxonomic Status of Odontobutis obscurus in Huaihe River

Morphological characters of Odontobutis obscurus in Huaihe river were studied and its taxonomic status was also discussed.In countable characters,there are Ⅶ,Ⅰ-9~10 dorsal fin-rays,14~15 caudal fin-rays,Ⅰ-7~8 anal fin-rays,Ⅰ-5 ventral fin-rays,14~15 pectoral fin-rays,36~41 longitudinal scales,14~18 transverse scales,9~11 gill rakes,28~29 vertebras.In measurable characters,total length is(1.23±0.03)times of body length;body length is(3.82±0.45)times of body height,(3.08±0.49)times of head length,(5.19±0.54)times of caudal peduncle length,(1.86±0.52)times of digestive tube length,(6.99±2.86)times of intestines length.Head length is(2.94±0.42)times of snout length,(6.09±0.87)times of eye diameter,(3.86±0.61)times of the distance between eyes,(1.94±0.27)times of mouth width.Body height is(0.96±0.11)times of body width.Caudal peduncle length is(1.66±0.18)times of caudle peduncle height.