Annelids are considered members of the Lophotrochozoa, a "super-phylum" of protostomes that also includes molluscs, brachiopods, flatworms and nemerteans. The basic annelid form consists of multiple segments. Each segment has the same sets of organs and, in most polychates, has a pair of parapodia that many species use for locomotion.
Sense organs of annelids generally include eyes, taste buds, tactile tentacles, and organs of equilibrium called statocysts. Reproduction Reproduction is sexual or asexual. Asexual reproduction is by fragmentation, budding, or fission. Among sexually reproducing annelids hermaphrodites are common, but most species have separate sexes.
Annelids are hermaphroditic; reproduction is commonly sexual, but many species reproduce asexually by budding or fragmentation. Annelids are important components of their respective habitats, whether it be the bottom of freshwater or marine environments, or the soil.
Annelids On being a worm. Coelomate Protostome relationships. Monophyletic; Synapomorphies. Blastopore becomes mouth ... Protandrous hermaphrodites (male first, change sex to female as grow older) Fertilization internal . Why be a worm? Many groups have converged on this body plan.
Annelida - "Ringed Worm" Leech. Leeches are hermaphrodites, possessing both male and female organs. Reproduction occurs from the intertwining bodies of two worms and the sperm is collected by the female. Male leeches do not have a penis, but instead they have sharp packages of sperm that disperse when engaging in sexual reproduction. ...
In biology, a hermaphrodite (/ h ɜːr ˈ m æ f r ə d aɪ t /) is an organism that has complete or partial reproductive organs and produces gametes normally associated with both male and female sexes. Many taxonomic groups of animals (mostly invertebrates) do not have separate sexes. In these groups, hermaphroditism is a normal condition, enabling a form of sexual reproduction in which ...
A characteristic feature of hermaphroditic annelids is the frequent occurrence of different types of asexual reproduc- tions (for example, paratomic fission combined with pygidial budding, fragmentation and parthenogenesis). In Polychaeta, a parent often produces one progeny nearly identical to itself by a paratomic fission combined with ...
Annelids are capable of both sexual and asexual reproduction. The majority of annelids are hermaphroditic and have a set of functional male and female sex organs.
Oligochaete: Oligochaete, any worm of the subclass Oligochaeta (class Clitellata, phylum Annelida). About 3,500 living species are known, the most familiar of which is the earthworm (q.v.), Lumbricus terrestris. Oligochaetes are common all over the world. They live in the sea, in fresh water, and in moist soil.
Annelida, also known as Rengeroworms, include over 17,000 modern species including peanutworms, earthworms and leeches. Annelids are all bilaterally symmetrical animals. They range in size from much less than 1 mm in length to more than 3 m.