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By Harold Fox

This booklet took place due to a overview I had written prior on fea­ tures of mobile alterations happening in the course of anuran metamorphosis. just a restricted remedy of this topic used to be attainable in this kind of circumscribed paintings and purely particular examples of natural switch have been handled. therefore the sins of omission weighed seriously, for therefore a lot info couldn't be incorporated to supply a extra accomplished and authenticated account of the frilly, complicated, and far-reaching adjustments that an aquatic larva undergoes to develop into a terrestrial froglet. a great deal of my operating lifestyles has been spent investigating amphib­ ians, particularly their larval developmental morphology in the course of metamor­ phosis, first on the point of sunshine microscopy and in later years through electronmicroscopy. first and foremost i used to be relatively serious about morpho­ logical homologies of a number of larval buildings, equivalent to the cranial and pharyngeal skeleton and the nerves and musculature, so one can research extra approximately amphibian phylogeny, for in the course of my pre-and early postgrad­ uate years G. R. Beer and D. M. S. Watson encouraged an timeless curiosity in and admire for vertebrate comparative anatomy. even though, it now seems that amphibian phylogenetic relationships are most sensible handled by way of the paleontologists, so ably verified via D. M. S. Watson and A. S. Romer and the modern fans during this box like A. L. Panchen, R. L. Carroll, E. Jarvik, and ok. S. Thompson between a bunch of others, fairly within the USA.

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Family Dendrobatidae Phyllobates fermoralis 8. Tables of Staged Specimens (continued) w ;;;. i~~ ~ ~ 5' <:;: i ).. 1-50 egg to end of metamorphosis. 33-50 (metamorphosis). 44--50 tail regression St. 1-25 to closure of operculum. Compares with R. temporaria, R. terrestris and Bufo bufo. I-25 to completion of the formation of operculum (10 rom larva, 11 d old, 18-20°C) Description of breeding and of four stages of larval development; from a pre limb to the metamorphosed stage Complete series of 54 Stages General information on larvae and data on their growth Information on eggs and larvae, through climax of specimens from Louisiana.

St. XV (tail reduced to small knob, specimen otherwise same as previous stage. Also internal organogeny Embryology, especially of spinal cord. Stages in days before specimens in eggs hatched (after usage by Lynn (1942) for E. nubicola General information Information on embryos and larvae. Larval life span 24 d. Morphology identical with C. :l... ;:::t ~ n' i ~ m ~ ~. , 1966 cHulse, 1979 Cei, 1968 Dent, 1956 Lepidobatrachus asper Hylorina sylvatica CFormas and Pugin, 1978 Cei, 1968 Eggs laid in foam nests.

L... ;:::t ~ n' i ~ m ~ ~. , 1966 cHulse, 1979 Cei, 1968 Dent, 1956 Lepidobatrachus asper Hylorina sylvatica CFormas and Pugin, 1978 Cei, 1968 Eggs laid in foam nests. Hatching 36-48 h; maximum larval size, 35-40 mm; fully metamorphosed 31-36 d Staged after Gosner (1960) and Limbaugh and Volpe (1957). Stages 34, 40, and 43 described and illustrated Described and illus. 36 larva New spp. larval mouth parts described. Development of larva in field rapid 03-14 d) Various species; general information St.

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