Ammocoetes: max. size, 111 mm TL; approx. body proportions, as percentage of TL: 6.2-12.9 prebranchial length, 9.7-17.4 branchial length, 52.5-77.1 trunk length, and 12.0-25.6 tail length; trunk myomeres, 66-83; distinctive characters in ammocoetes from Argentina: cloaca under the anterior half of the second dorsal fin, distinct notch between the confluent second dorsal and caudal fins, caudal fin spade-like, pigmentation coverage (refers to extent and not to intensity or darkness): none on upper lip, subocular, upper prebranchial, lower prebranchial and lower branchial, 1% to <75% on upper branchial, 25% to >75% on caudal fin; distinctive characters in ammocoetes from Chile: cloaca under the origin of the second dorsal fin, second dorsal and caudal fins smoothly confluent, caudal fin rounded, pigmentation: 75% or more on upper lip, subocular, upper prebranchial and lower prebranchial, 25% to >75% on upper branchial, none on lower branchial and on caudal fin; distinctive characters in ammocoetes from Australasia: cloaca under the origin of the second dorsal fin, second dorsal and caudal fins smoothly confluent, caudal fin rounded, pigmentation: 75% or more on upper lip, upper prebranchial and lower prebranchial, none on subocular and caudal fin, 25% to >75% on upper branchial, 1% to <25% on lower branchial. Metamorphosing ammocoetes: 76-112 mm TL. |