อันดับ สรุป for Gobiesociformes
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อ้างอิงหลัก |
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อันดับ |
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Gobiesociformes clingfishes |
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ลำดับชั้นย่อยของไฟลัม |
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Teleostei |
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ลำดับรอง |
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Zeiformes 15 M years |
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อ้างอิง |
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พบซากสัตว์ครั้งแรกเมื่อ |
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late Tertiary |
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พบใน |
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เกี่ยวกับทะเล,น้ำเค็ม |
สด |
กร่อย |
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ข้อสังเกต |
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Pelvic fins modified into a thoracic sucking disc (permitting fish to adhere to substrate), with underlying pelvic bones specialized for supporting disc (pelvic skeleton highly reduced in Alabes; each pelvic fin with one small spine and four soft rays (rarely five); single dorsal fin without spines; head and body scaleless; branchiostegal rays 5-7 (three in Alabes); no circumorbital bones posterior to the lachrymal; articular process of premaxilla either fused with ascending process or absent; basibranchials one and two probably absent; supracleithrum with concave process that articulates with condyle oncleithrum (not known from other fishes); basisphenoid and orbitosphenoid absent; genital papilla behind anus; three or three and half gills; hypurals fused into a single plate; no swim bladder. The following characters apply to all species except Alabes: scapula and four pectoral radials and 16-31 pectoral fin rays; usually two postcleithra (rarely one); either common gill opening or separate opening on each side; pleural ribs attached to the epineural (?) ribs (an opposite relationship to that found in most fish); total caudal fin rays 16-27 (8-14 articulating on hypural fan); vertebrae 25-54 (11-20 + 13-33). Maximum length normally 7 cm. |
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ลำดับชั้นย่อยของไฟลัม นิรุกติศาสตร์ |
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Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335. |
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อันดับ นิรุกติศาสตร์ |
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Latin gobius = goby + Latin esox = pike (position of dorsal and anal fin) + Latin, forma = shape (Ref. 45335). |
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วงศ์ |
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( n = 1 ) - Gobiesocidae |
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