. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PAGURIDAE DIOGENIDAE COENOBITIDAE Long, thin slalk Small, spherical ampulla Presence of main ampulla and accessory ampulla Short, thick stalk Large, ovoid ampulla Presence of mam ampulla only Tripartite pedunculate paguroidean spermatophore: consisting of an ampulla, slalk and pedestal Figure 4. A branching key to classify the investigated hermit crabs into their respective family based on the structure of their spermatophores. Spermatophores not to scale. logenetic relationships. It seems very likely that both habitat and p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PAGURIDAE DIOGENIDAE COENOBITIDAE Long, thin slalk Small, spherical ampulla Presence of main ampulla and accessory ampulla Short, thick stalk Large, ovoid ampulla Presence of mam ampulla only Tripartite pedunculate paguroidean spermatophore: consisting of an ampulla, slalk and pedestal Figure 4. A branching key to classify the investigated hermit crabs into their respective family based on the structure of their spermatophores. Spermatophores not to scale. logenetic relationships. It seems very likely that both habitat and phylogeny influence spermatophore mor- phology of any particular taxa. For example, in the Coe- nobitidae, the move to a semi-terrestrial or terrestrial lifestyle from a marine one may have influenced the shape of the spermatophores of the species concerned, but the over-all tripartite, pedunculate spermatophore plan is phylogenetically set. In the Paguroidea, light microscope observations of spermatophores can be used successfully to distinguish the three separate families and possibly even apply at the generic level, but more species will have to be studied to be confident at a specific level. Some exceptions have been recorded, as in the case of Cestopagnrus timidus (Mouchet, 1431, as Eitpagurm timidus}, in which a pa- gurid was recorded as possessing a diogenid type sper- matophore morphology. As spermatophore studies widen to include more species and even other families, further confirmation or contradiction to this system will un- doubtedly occur. A simple key (not intended as a phy- logeny), in branching form (Fig. 4), is presented here and can be used to classify the currently investigated hermit crabs to the family level based on gross spermatophore morphology. Acknowledgments I wish to acknowledge the assistance of Mr. S. Lavery for supplying the SW Pacific specimens and Mr. S. Fitz- simmons for helping to collect on Heron Island. Many thanks to Mr. S. Cook (Queensland
Size: 1977px × 1264px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
