Annelid functional genomics reveal the origins of bilaterian life cycles
2022年12月21日 · Annelids, however, show diverse life cycles and larval morphologies, including species with direct and indirect development and either planktotrophic or lecithotrophic larvae 19.
Annelid - Wikipedia
Annelids are members of the protostomes, one of the two major superphyla of bilaterian animals – the other is the deuterostomes, which includes vertebrates. [68] Within the protostomes, annelids used to be grouped with arthropods under the super-group Articulata ("jointed animals"), as segmentation is obvious in most members of both phyla.
Annelid - Segmentation, Metamorphosis, Reproduction | Britannica
2024年11月15日 · In annelids, the first four cells (blastomeres) give rise, by alternating clockwise and counterclockwise divisions, to a cap of smaller cells, called micromeres, at one end of the egg and a cap of larger cells, called macromeres, at the other end.
Annelid | Definition, Characteristics, Habitat, Reproduction, Diet ...
6 天之前 · annelid, any member of a phylum of invertebrate animals that are characterized by the possession of a body cavity (or coelom), movable bristles (or setae), and a body divided into segments by transverse rings, or annulations, from which they take their name.
An Overview of Annelid Development - Academic library
The diversity of annelid life histories can be grouped in two initial categories: indirect and direct developers. Indirect developers hatch as some type of trochophore larva, which comprises the rudiments of the anterior and posterior terminal regions of the adult worm (Figure 4.IB).
Annelid - Examples, Characteristics, Anatomy, & Pictures
2024年8月1日 · Annelids, commonly known as segmented worms, are soft-bodied, bilaterally symmetrical invertebrates of the phylum Annelida. They constitute the earthworms, leeches, and ragworms, traditionally grouped into polychaetes, oligochaetes (including earthworms), and …
Annelid functional genomics reveal the origins of bilaterian life cycles
2023年1月25日 · We performed chromosome-scale genome sequencing in the annelid Owenia fusiformis with transcriptomic and epigenomic profiling during the life cycles of this and two other annelids.
Annelid functional genomics reveal the origins of bilaterian life cycles
Schematic drawing of the life cycle and patterning events in a bilaterian with indirect development with a feeding larva like the annelid O. fusiformis and Figure 5B. Schematic drawings of the three main types of life cycles and the timing of Hox gene expression in Bilaterians.
Annelida - SpringerLink
The life cycle of this indirect developing gonochoric species with planktotrophic larvae is well established and controllable in the lab. Immature, atokous worms live in self-constructed tubes.
Evolutionary crossroads in developmental biology: annelids
2012年8月1日 · Annelids (the segmented worms) have a long history in studies of animal developmental biology, particularly with regards to their cleavage patterns during early development and their neurobiology.