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128
A new classification of the Galatheoidea (Crustacea: Decapoda: Anomura
- Zootaxa
, 2010
"... The high level classification of the Galatheoidea, popularly known as squat lobsters, has been relatively stable for almost a century. Multiple recent studies of their interrelationships, however, have revealed significant incongruities between the traditional classification and phylogeny. The Aegli ..."
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The high level classification of the Galatheoidea, popularly known as squat lobsters, has been relatively stable for almost a century. Multiple recent studies of their interrelationships, however, have revealed significant incongruities between the traditional classification and phylogeny. The Aeglidae, Chirostylidae and Kiwaidae were recently removed to other superfamilies. On the basis of previous phylogenetic analyses, we herein revise the higher classification of the remaining Galatheoidea to comprise four families: Galatheidae, Munididae fam. nov., Munidopsidae, and Porcellanidae. The galatheoid families are both morphologically and ecologically distinct. Members of the Munidopsidae are distinguished by the absence or reduction of the maxilliped 1 flagellum and usually occur in outer slope or abyssal habitats. Members of the Munididae fam. nov. are united by the trifid or trispinous anterior margin of the carapace and usually occur at outer shelf or slope depths. The Galatheidae includes primarily shallow water species, united by a broad, triangular rostrum, and is most closely related to the porcelain crabs, Porcellanidae. The families of the Galatheoidea are diagnosed and a diagnostic key provided. Extant and fossil genera are listed for each galatheoid squat lobster family. Key words: Galatheoidea, Galatheidae, Munididae fam. nov., Munidopsidae, Porcellanidae, squat lobsters, phylogeny, classification
Numbers of Living Species
"... in Australia and the World 2 nd edition australia’s nature there is more ..."
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in Australia and the World 2 nd edition australia’s nature there is more
Phylogenetic analysis and revised classification of podotrematous Brachyura (Decapoda) including extinct and extant families
- Journal of Crustacean Biology
, 2011
"... A phylogenetic analysis based upon 30 extinct and extant taxa of podotrematous brachyuran decapods using 74 characters shows that Podotremata sensu Guinot, 1977 is not monophyletic and results in a new classification for these crabs. Four new taxa are recognized at the section-level (Homoloida, Tory ..."
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A phylogenetic analysis based upon 30 extinct and extant taxa of podotrematous brachyuran decapods using 74 characters shows that Podotremata sensu Guinot, 1977 is not monophyletic and results in a new classification for these crabs. Four new taxa are recognized at the section-level (Homoloida, Torynommoida, Etyoida, and Dakoticancroida) as well as two new families (Basinotopidae and Xandarocarcinidae). Dromiacea as historically defined is redefined herein to exclude Homoloidea. New generic names Noetlingocarcinus and Xandarocarcinus, and Seorsus millerae new combination also resulted from the work.
Parallel evolution of the genetic code in arthropod mitochondrial genomes. PLoS Biol
, 2006
"... The genetic code provides the translation table necessary to transform the information contained in DNA into the language of proteins. In this table, a correspondence between each codon and each amino acid is established: tRNA is the main adaptor that links the two. Although the genetic code is near ..."
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The genetic code provides the translation table necessary to transform the information contained in DNA into the language of proteins. In this table, a correspondence between each codon and each amino acid is established: tRNA is the main adaptor that links the two. Although the genetic code is nearly universal, several variants of this code have been described in a wide range of nuclear and organellar systems, especially in metazoan mitochondria. These variants are generally found by searching for conserved positions that consistently code for a specific alternative amino acid in a new species. We have devised an accurate computational method to automate these comparisons, and have tested it with 626 metazoan mitochondrial genomes. Our results indicate that several arthropods have a new genetic code and translate the codon AGG as lysine instead of serine (as in the invertebrate mitochondrial genetic code) or arginine (as in the standard genetic code). We have investigated the evolution of the genetic code in the arthropods and found several events of parallel evolution in which the AGG codon was reassigned between serine and lysine. Our analyses also revealed correlated evolution between the arthropod genetic codes and the tRNA-Lys/-Ser, which show specific point mutations at the anticodons. These rather simple mutations, together with a low usage of the AGG codon, might explain the recurrence of the AGG reassignments.
Stomatopod Interrelationships: Preliminary Results Based on Analysis of three Molecular Loci
"... The mantis shrimps (Stomatopoda) are quintessential marine predators. The combination of powerful raptorial appendages and remarkably developed sensory systems place the stomatopods among the most efficient invertebrate predators. High level phylogenetic analyses have been so far based on morphology ..."
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The mantis shrimps (Stomatopoda) are quintessential marine predators. The combination of powerful raptorial appendages and remarkably developed sensory systems place the stomatopods among the most efficient invertebrate predators. High level phylogenetic analyses have been so far based on morphology. Crown-group Unipeltata appear to have diverged in two broad directions from the outset – one towards highly efficient ‘spearing ’ with multispinous dactyli on the raptorial claws (dominated by Lysiosquilloidea and Squilloidea), and the other towards ‘smashing ’ (Gonodactyloidea). In a preliminary molecular study of stomatopod interrelationships, we assemble molecular data for mitochondrial 12S and 16S regions, combined with new sequences from the 16S and two regions of the nuclear 28S rDNA to compare with morphological hypotheses. Nineteen species representing 9 of 17 extant families and 3 of 7 superfamilies were analysed. The molecular data reflect the overall patterns derived from morphology, especially in a monophyletic Squilloidea, a monophyletic Lysiosquilloidea and a monophyletic clade of gonodactyloid smashers. Molecular analyses, however, suggest the novel possibility that Hemisquillidae and possibly Pseudosquillidae, rather than being basal or near basal in Gonodactyloidea, may be basal overall to the extant stomatopods. In this context, it is significant that in many respects, hemisquillids resemble the stem-lineage condition more so than any other extant forms.> Key words Hoplocarida, Stomatopoda, molecular phylogeny.
A new family of Triassic lobsters (Decapoda: Astacidea) from British Columbia and its phylogenetic context
- J
, 2004
"... ABSTRACT—Chimaerastacus pacifluvialis, new genus and species, is established on the basis of fossils from the Middle Triassic Liard Formation of northeastern British Columbia. It has well-defined cervical, postcervical, and branchiocardiac grooves; three longitudinal ridges on the cephalic region; a ..."
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ABSTRACT—Chimaerastacus pacifluvialis, new genus and species, is established on the basis of fossils from the Middle Triassic Liard Formation of northeastern British Columbia. It has well-defined cervical, postcervical, and branchiocardiac grooves; three longitudinal ridges on the cephalic region; and true chelae on the first through third pereiopods. The morphological features of the carapace are a combination of traits used to define both the erymids and the glypheids. A cladistic analysis of 31 decapod genera defines the Astacidea as a monophyletic group, supports the inclusion of the Glypheoidea within the infraorder Astacidea, illustrates the relationships of the Glypheoidea with other astacid groups, and suggests erection of a new family, the Chimaerastacidae, for our new genus and species of decapod. Specimens of C. pacifluvialis are preserved in a sandy bioclastic floatstone that was deposited near the Peace River Embayment in the Middle Triassic. The host lithology suggests that the decapods inhabited a transitional environment between low relief biostromes and the shoreface. This environment provided a unique set of conditions that allowed exceptional preservation of the decapod material.
Branchiura (Crustacea) – Survey of Historical Literature and Taxonomy
"... The Branchiura (carp lice) is a small group of parasitic Crustacea found mainly on freshwater fish comprising the four genera Argulus, Dolops, Chonopeltis and Dipteropeltis. The earliest descriptions of “carp lice ” dates back to 10 th century China, and several descriptions were made in the beginni ..."
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The Branchiura (carp lice) is a small group of parasitic Crustacea found mainly on freshwater fish comprising the four genera Argulus, Dolops, Chonopeltis and Dipteropeltis. The earliest descriptions of “carp lice ” dates back to 10 th century China, and several descriptions were made in the beginning of the “modern age ” of Zoology beginning in the 18 th century. However, the last genus to be described was Dipteropeltis as late as in 1912. While a few species like Argulus foliaceus, A. japonicus and Dolops ranarum are fairly well-known, most Branchiura species remain more or less uninvestigated. As the literature is far spread and often hard to access, this survey aims to give an overview of the most important available historical literature on morphology, and systematics / nomenclature in a chronological order for each of the four genera, to the hopeful benefit of Branchiura researchers.> Key words
Exceptional variation on a common theme: the evolution of crustacean compound eyes
- Evo. Edu. Outreach
, 2008
"... Abstract The Crustacea contain an amazing, and often (to humans) bizarre, array of visual designs. This diversity includes many different examples of both simple and compound eyes, each with standard or uniquely crustacean features. In this review, we focus on the anatomical variation, optical prin ..."
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Cited by 3 (0 self)
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Abstract The Crustacea contain an amazing, and often (to humans) bizarre, array of visual designs. This diversity includes many different examples of both simple and compound eyes, each with standard or uniquely crustacean features. In this review, we focus on the anatomical variation, optical principles, and molecular diversity of crustacean compound eyes to illustrate how the complicated structures involved in vision are adapted for particular environments. Using this knowledge as a starting point, and considering what is known of crustacean evolution overall, we present the most recent ideas of how crustacean compound eyes have evolved and show how eyes that are based on fundamentally different optical principles can in fact be derived from each other and thus be closely related through common descent.
Key Words
, 1983
"... barnacle, hermit crabs, symbionts, parasites, new species. ..."
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barnacle, hermit crabs, symbionts, parasites, new species.
Yeasts from Macrobrachium amazonicum: a focus on antifungal susceptibility and virulence factors of Candida spp
- FEMS Microbiology Ecology
, 2011
"... Abstract In the present study, it was sought to compare yeast microbiota of wild and captive Macrobrachium amazonicum and evaluate the antifungal susceptibility and production of virulence factors by the recovered isolates of Candida spp. Additionally, cultivation water was monitored for the presen ..."
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Abstract In the present study, it was sought to compare yeast microbiota of wild and captive Macrobrachium amazonicum and evaluate the antifungal susceptibility and production of virulence factors by the recovered isolates of Candida spp. Additionally, cultivation water was monitored for the presence of fungi. Overall, 26 yeast isolates belonging to three genera and seven species were obtained, out of which 24 were Candida spp., with Candida famata as the most prevalent species for both wild and captive prawns. From cultivation water, 28 isolates of filamentous fungi were obtained, with Penicillium spp., Cladosporium spp. and Aspergillus spp. as the most frequent genera. Eight out of 24 Candida spp. isolates were resistant to azole derivatives, out of which four were recovered from wild-harvested prawns. As for production of virulence factors, three (12.5%) and eight (33.3%) isolates presented phospholipase and protease activity, respectively. This is the first comparative study between wild and captive prawns and the first report on yeast microbiota of M. amazonicum. The most relevant finding was the high percentage of resistant Candida spp., including from wild individuals, which suggests the occurrence of an environmental imbalance in the area where these prawns were captured.
