As a general rule, the larva possesses a long tail, containing muscles, a hollow dorsal nerve tube and a notochord, both features clearly indicative of the animal's chordate affinities. One group …

2003年4月1日 · Comparing gene-expression patterns between the vertebrate CNS, the ascidian CNS and the hemichordate tornaria larva (c) has provided information on the origins and …

2001年9月7日 · The remarkable cellular simplicity of the ascidian larva with its paucity of tissue types, its near transparency, and rapid development (18 hr from fertilization to terminal …

The name Larvacea refers to the close similarity of adult Appendicularia with the ascidian tadpole larva, their body being formed of a “trunk”, 1–4 mm long, and a much longer tail (Fig. 9); in …

2007年3月15日 · In this review, we describe ascidian embryogenesis and its cell lineages, introduce several characteristics of ascidian embryos, describe recent advances in …

Ascidian larvae exhibit the simplest chordate body plan, with a head and a tail containing a notochord, three rows of muscle cells, and a hollow dorsal nerve. I have identified four novel …

Ascidians are ontogenetically dimorphic organisms in which a nonfeeding, short-living pelagic chordate-like larva metamorphoses into a nonchordate, sessile, filter-feeding adult ascidian. …

2016年3月9日 · Ascidians are exclusively marine prochordates belonging to the Class Ascidiacea of the subphylum Urochordata . There are both solitary and colonial forms with a sessile adult …

In the solitary ascidian Halocynthia roretzi, a species reared for commercial purposes, embryogenesis has been described in detail, but information on the larval anatomy is still …

Ascidians or sea-squirts (more than 5500 species) are sessile, marine invertebrates, including solitary and colonial species, diffused throughout the world, mainly in shallow tropical and …