形态学资料 Microsynodontis nannoculus
检索表
Abnormalities
主要参考文献 Ng, H.H., 2004
形态描述的性别
Bones in OsteoBase

性别内容

特殊器官
不同的外表
不同的颜色
附注 Males with numerous tubercles on sides of head on region extending from snout to preopercle, and long genital papilla situated immediately posterior to anus; females with fewer tubercles on sides of head, and with smaller, distally flattened genital papilla (Ref. 52369).

稚鱼与成鱼的特徵描述

显着的特徵
侧面体型 fusiform / normal
横切面
头部背面描绘
眼的类型 more or less normal
口/吻尖的类型
口的位置 sub-terminal/inferior
Type of scales
鉴别

Diagnosis: body moderately slender, deep (17.6-19.9% SL); anterior edge of pectoral spine with anteriorly directed serrations along proximal half; eye diameter 10.6-12.2% SL; snout length 47.9-48.0% SL; supracleithral process not reaching to vertical through posterior-most tip of nuchal shield; adipose fin base short, 29.4-33.8% SL; body without numerous dark brown elongate spots; caudal peduncle slender, its depth 9.2-9.8% SL; both sexes with short (< 0.1 mm) tubercles on dorsal and lateral surfaces of head (Ref. 81251). Caudal fin rounded; dorsal spine curved (Ref. 52369, 81251).

Description: body compressed; predorsal profile gently convex; postdorsal body sloping gently ventrally; head depressed and broad, acutely rounded when viewed laterally and with rounded snout margin when viewed from above; eye ovoid, horizontal axis longest, and small, 10.6%-12.2% of head length vs. 13.1-25.7% in other Microsynodontis-species; mouth inferior and crescent-shaped; lips plicate; maxillary barbel long and slender, extending to just beyond base of last pectoral-fin ray; inner mandibular-barbel origin close to midline, extending to base of pectoral spine and with 2 short, thin branches on anterior half and 3-4 long, thin branches on posterior half; outer mandibular barbel originates posterolateral of inner mandibular barbel, extending to middle of pectoral-fin base and with 3-4 long, thin branches; gill openings narrow, extending from immediately ventral to posttemporal to immediately ventral to base of pectoral spine; dorsal fin located at anterior third of body, with convex margin; dorsal-fin spine short, stout and slightly curved, smooth on both anterior and posterior margins; adipose fin moderately long; margin slightly convex for entire length and posterior end deeply incised; caudal fin rounded, with principal rays; anal-fin base located ventral to posterior half of adipose fin, with iv,7-9 rays and convex margin; pelvic-fin origin at vertical ventral to posterior end of dorsal-fin base, with slightly convex margin ; pectoral-fin spine slightly curved and stout; anterior spine margin with 17-20 small serrations along entire length of spine, serrations antrorse on distal 2/3 and anteriorly directed on proximal third; posterior spine margin with 9-10 strong serrations along entire length; lateral line complete and midlateral (Ref. 52369).

Coloration: dorsal and lateral surfaces of head and body medium brown, fading to cream or light grayish brown on ventral third of body, belly, and ventral surface of head, in preserved specimens; snout with a series of cream spots delineating anterior and posterior nares; cheek region with 1-2 cream spots immediately ventral to orbit; cream band encircling nape at supraoccipital; dorsal third of body with series of 4 cream slender, vertical bar-shaped marks extending beyond lateral midline of body: 1st at middle of dorsal-fin base, 2nd at adipose-fin origin, 3rd at middle of adipose-fin base and last on caudal peduncle immediately posterior to adipose fin; ventral third of flanks with a longitudinal series of 5-7 cream spots or vertical bar-shaped marks; dorsal, pectoral, pelvic and anal fins hyaline and with 1-2 rows of elongate spots forming longitudinal brown rows; caudal fin hyaline, with elongate brown spots forming 2-3 irregular columns (Ref. 52369, 81251).

鉴定难易度

分节特性 Microsynodontis nannoculus

侧线 1 打断: No
侧联机的鳞片
侧联机鳞片数
侧生系列的鳞片
侧联机的鳞片列
侧线下的鳞片列
尾梗周围的鳞片
触须 6
鳃裂 (仅限于鲨鱼/ 鱼)
鳃耙
在下肢上
上枝鳃耙
总数
脊椎骨
肛门前
总数 36 - 36

背鳍 (s)

属性 no striking attributes
鳍数 1
离鳍号码 Dorsal   
Ventral  
棘总数 2 - 2
软条总数 7 - 7
脂鳍 present

尾鳍

属性 more or less truncate; more or less normal

臀鳍 (s)

鳍数 1
棘总数 0 - 0
软条总数 11 - 13

偶鳍

胸鳍 属性  1st ray hardened with locking structure
脊椎     1
软条   6 - 6
骨盘的 属性  more or less normal
位置    abdominal  behind origin of D1
脊椎     0
软条   7 - 7
主要参考文献 (例如 9948)
字汇 ( 例如 cephalopods )
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