Wfb 232 Ichthyology Taxonomy, Week 7 14 March 2005
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| WFB 232 Ichthyology
Taxonomy, Week 7 14 March 2005 Superclass GnathostomataClass Actinopterygii Subclass Neopterygii Division Teleostei Subdivision Euteleostei Superorder Stenopterygii Order Stomiiformes (lightfishes, hatchetfishes, dragonfishes) Similar to Salmoniformes, but jaws are more dexterous Adipose fin is present in most; soft-rayed, physostomic, gas bladder in most Scales cycloid (when present), photophores present in most Distribution: Deep-sea, worldwide Body shapes: highly variable; anguilliform , compressiform, fusiform Superorder Cyclosquamata Order Aulopiformes (threadsails, tripodfishes, lizardfishes, telescopefishes)
Mostly distinguished from Stomiiformes & Myctophiformes by fusions of branchial bones & musculature features Some are predators, others are grazers Superorder Scopelomorpha Order Myctophiformes (Lanternfishes & blackchins)
Most have large eyes, photophores Some genera (Diaphus, Lampanyctus, Myctophum, Tarleonbeania) make daily vertical migrations in water column – surface at night, deep water during daylight hours Most are planktivorous; provide large quantities of food for other fishes Superorder Lampridomorpha Order Lampridiformes (oarfishes, ribbonfishes, opah or moonfish) Marine; shallow to deep water, scales are cycloid (if present); physoclistus Most are soft rayed, but some have modified spines in dorsal and anal fins Many have bizarre coloration and fin shapes – sea serpents? Oarfish – up to 8 m long, long pelvic fins, long dorsal fins Tube-eyes – telescoping eyes, suction feed on plankton, live in deep water Superorder Polymixomorpha Polymixiiformes (barbudos, beardfishes) Live in mid-depths of western Pacific & Atlantic oceans “Composite” of many orders Have long barbels off chin Directory: rsenr -> wfb232 wfb232 -> Class: Actinopterygii Order: Lampridiformes Families wfb232 -> Class – Chondrichthyes Subclass – Elasmobranchii Superorder Download 7.04 Kb. Share with your friends:
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