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Order Summary for Percopsiformes
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Main Ref |
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Order |
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Percopsiformes trout-perches, pirate perches and cavefishes |
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Class |
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Teleostei |
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Sister Order |
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Lophiiformes 50 M years |
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Ref. |
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First Fossil Record |
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early Tertiary |
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Occurs in |
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Marine |
Fresh |
Brackish |
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Remark |
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Premaxilla nonprotractile; ectopterygoid and palatine with teeth; pelvic fins, if present, behind pectorals and with 3-8 soft rays; spines (normally weak) usually present in dorsal fin; many species with ctenoid scales; six branchiostegal rays; 16 branched caudal rays; orbitosphenoid, basiphenoid, and suborbital shelf absent; vertebrae 28-35. |
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Class etymology |
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Greek aktis = ray, thunderbolt, beam + Greek pterygion, diminutive of pteryx = wing, fin. Ref. 45335. |
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Order etymology |
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Greek, perké = perch + Greek,opsis = look, appearance + Latin, forma = shape (Ref. 45335). |
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Families |
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