A remarkable new jellyfish (Cnidaria: Scyphozoa) from coastal Australia, representing a new suborder within the Rhizostomeae
ABSTRACT A new genus and species of rhizostome jellyfish, which cannot be placed in any known
family or suborder, is described from central eastern Australia. The Ptychophorae
suborder nov., can be separated from the two recognised suborders of the Rhizostomeae
in having hooded rhopalia rather than open pits, unbranched evenly-spaced radial
canals, and a large circular stomach. It also possesses a unique combination of some of
the primary diagnostic characters of rhizostome families in both current suborders.
Moreover, Bazinga rieki gen. nov., sp. nov. is unique among all rhizostomes in its very
small mature size. It is probable that this species has been previously mistaken for
juveniles of other species.
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Article: A remarkable new jellyfish (Cnidaria: Scyphozoa) from coastal Australia, representing a new suborder within the Rhizostomeae
SourceAvailable from: Allen G. Collins[Show abstract] [Hide abstract]
ABSTRACT: A stable phylogenetic hypothesis for families within jellyfish class Scyphozoa has been elusive. Reasons for the lack of resolution of scyphozoan familial relationships include a dearth of morphological characters that reliably distinguish taxa and incomplete taxonomic sampling in molecular studies. Here, we address the latter issue by using maximum likelihood and Bayesian methods to reconstruct the phylogenetic relationships among all 19 currently valid scyphozoan families, using sequence data from two nuclear genes: 18S and 28S rDNA. Consistent with prior morphological hypotheses, we find strong evidence for monophyly of subclass Discomedusae, order Coronatae, rhizostome suborder Kolpophorae and superfamilies Actinomyariae, Kampylomyariae, Krikomyariae, and Scapulatae. Eleven of the 19 currently recognized scyphozoan families are robustly monophyletic, and we suggest recognition of two new families pending further analyses. In contrast to long-standing morphological hypotheses, the phylogeny shows coronate family Nausithoidae, semaeostome family Cyaneidae, and rhizostome suborder Daktyliophorae to be nonmonophyletic. Our analyses neither strongly support nor strongly refute monophyly of order Rhizostomeae, superfamily Inscapulatae, and families Ulmaridae, Catostylidae, Lychnorhizidae, and Rhizostomatidae. These taxa, as well as familial relationships within Coronatae and within rhizostome superfamily Inscapulatae, remain unclear and may be resolved by additional genomic and taxonomic sampling. In addition to clarifying some historically difficult taxonomic questions and highlighting nodes in particular need of further attention, the molecular phylogeny presented here will facilitate more robust study of phenotypic evolution in the Scyphozoa, including the evolution characters associated with mass occurrences of jellyfish.Integrative and Comparative Biology 09/2010; 50(3):436-55. DOI:10.1093/icb/icq074 · 2.97 Impact Factor
Article: Synopsis of the Medusae of the World[Show abstract] [Hide abstract]
ABSTRACT: This work was started many years ago in the form of a card-index for my own use. At the beginning the building up of the index involved a great deal of work, but later on it saved me time for my studies, and it was not difficult to keep it up to date. One day my friends, Dr F. S. Russell, director of the Marine Biological Laboratory, Plymouth, and Dr W. J. Rees, British Museum (Nat. Hist.), London, saw this index, and they repeatedly urged me to put it into a form suitable for publication for the benefit of other students of medusae. I agreed, though hesitatingly, because my time was much occupied. A grant from the Browne Research Fund of the Royal Society of London, however, enabled me to employ an assistant, Mr J. Liitzen, who under my supervision could carry out the necessary revision and the typing, as well as some translation from Danish or other languages into English; he has done it remarkably well, and I wish to thank him for his industrious and painstaking collaboration.Journal of the Marine Biological Association of the UK 10/1961; 40:7 - 382. DOI:10.1017/S0025315400007347 · 1.13 Impact Factor
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ABSTRACT: Inaug.-Diss.--Königsberg. Vita. "Abdruck aus 'Bibliotheca zoologica, hrsg. von dr. Rud. Leuckart und dr. Carl Chun. Cassel 1888. Heft III.'" "Benutzte literatur": 1 p. at end.