Preliminary report on the biology of the
enteropneust. Ptychodera flava Eschscholtz.
Enteropneust production of spiral fecal trails on the deep-sea floor observed with time-lapse photography.
The northwest plains were the home of deep-sea
enteropneust acorn worms.
Preliminary report on the biology of the
enteropneust, Ptychodera flava Eschscholtz, in the vicinity of Kushimoto, Japan.
Another novel genus of
enteropneust, Meloglossus, has been described on the basis of meiofaunal samples collected in Bermuda and Belize (Worsaae et al., 2012).
The sequences from the Kara Sea
enteropneust were approximately 500 base pairs of I65 rDNA (GenBank KC907711) and about 1700 base pairs of 18S rDNA (GenBank KC907710).
Deuterostome evolution: early development of the
enteropneust hemichordate.
Observations of similar gene expressions in the mouth region of annelid and
enteropneust larvae have been interpreted as indication of homology (Arendt et a!., 2001), but gene expression alone cannot be taken as a proof of homology (Nielsen and Martinez, 2003).
The developmental capacities of separated early blastomeres of an
enteropneust, Saccoglossus kowalevskii.
Ptychoderidae is the morphologically most complex of the
enteropneust families, and the life cycle of its species usually includes a tornaria larva.
The
enteropneust worms and bryozoan-like pterobranchs constitute the small deuterostome phylum Hemichordata, which is generally regarded as an early offshoot from the chordate line of evolution (Ruppert and Barnes, 1994).
Taxon Plumatella repens U12649 Bryozoan Terebratalia transversa U12650 Articulate Glottidia pyramidata U12647 Inarticulate Phoronis vancouverensis U12648 Phoronid Rhabdopleura normani U15664 Pterobranch Balanoglossus carnosus D14359
Enteropneust Antedon serrata D14357 Crinoid Asterias amurensis D14358 Seastar Artemia salina X01723 Crustacean Placopecten magellanicus X53899 Bivalve Branchiostoma floridae M97571 Cephalochordate Xenopus laevis X04025 Vertebrate Acanthopleura japonica X70210 Chiton Tenebrio molitor X07801 Insect Anemonia sulcata X53498 Cnidarian Sycon calcaravis D15066 Sponge