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The Magnitude of Global Marine Species Diversity
Phylogenetic Relationships among Major Species of Japanese Coleoid Cephalopods (Mollusca: Cephalopoda) Using Three Mitochondrial DNA Sequences
TLDR
Phylogenetic relationships among 36 species of major coleoid cephalopods from Japanese waters were studied using partial sequences of three mitochondrial genes, 16S r DNA, 12S rDNA, and cytochrome c oxidase subunit I gene to establish monophylic groups.
Phylogenetic position of the dicyemid mesozoa inferred from 18S rDNA sequences.
TLDR
The present results favor the hypothesis that the dicyemids do not represent an early divergent metazoan group, but rather a group degenerated from a triploblastic ancestor.
Renal organs of cephalopods: A habitat for dicyemids and chromidinids
TLDR
Comparative histology revealed that the external surface of renal organs varies morphologically in various cephalopod species, and provides a foothold for dicyemids and chromidinids with a conical head.
The phylogenetic position of dicyemid mesozoans offers insights into spiralian evolution
TLDR
Dicyemids display close affinity to orthonectids, and they may share a common ancestor with gastrotrichs and platyhelminths, rather than with mollusks and annelids, which supports the traditional acoeloid–planuloid hypothesis of a nearly microscopic, non-coelomate common ancestor of spiralians.
Reproductive traits in dicyemids
TLDR
Several characters involved in the life cycle in dicyemids were examined to understand reproductive strategy and adaptations to cephalopod hosts and an inverse proportional relationship was found between the number of infusorigens and the gametes, suggesting a trade-off between them.
World Octopus Fisheries
Abstract Recent studies have shown that coastal and shelf cephalopod populations have increased globally over the last six decades. Although cephalopod landings are dominated by the squid fishery,
Phylogenetic Analysis of Dicyemid Mesozoans (Phylum Dicyemida) From Innexin Amino Acid Sequences: Dicyemids Are Not Related to Platyhelminthes
TLDR
The Bayesian and maximum likelihood trees based on the innexin amino acid sequences suggested dicyemids to be more closely related to the higher lophotrochozoans than to the flatworms.
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