WormMine: LifeStage WBls:0000712

• Definition: Any developmental stage of a Cestode (tapeworm).
• Primary Identifier: WBls:0000712
• Public Name: Cestoda life stage

0 Anatomy Terms

1 Contained In

Remark	Definition	Other Name	Public Name	Primary Identifier
	Any developmental stage in Platyhelminthes (flatworms).		Platyhelminthes life stage	WBls:0000704

0 Expression Clusters

0 Expression Patterns

0 Followed By

0 Preceded By

5 Sub Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	A larval stage of some cestodes, including Hymenolepis sp. The cysticercoid is a type of cyst that is found in free form as well as being tissue-enclosed.		cysticercoid stage	WBls:0000717
	The larval stages of a tapeworm, beginning with the metamorphosis of the oncosphere and ending with the first evidence of sexuality in the adult worm. Includes the procercoid and plerocercoid stages of pseudophyllid cestodes, and the cysticercus, cysticercoid, coenurus, and hydatid stages of cyclophyllidean cestodes.		metacestode	WBls:0000716
Note that a hydatid cyst is a type of bladder larva, a larval form in which one or more scoleces develop in a fluid-filled cyst. Other types of bladder larva include cysticercus, coenurus and strobilocercus.	A larval stage of cestodes characterized by internal (and often external) chambers lined by germinal epithelium. The inner germinal layer of hydatid cysts is cellular and the protoscolex develops from those cells.		hydatid cyst stage	WBls:0000714
Note that a hydatid cyst is a type of bladder larva, a larval form in which one or more scoleces develop in a fluid-filled cyst. Other types of bladder larva include cysticercus, coenurus and strobilocercus.	An infective larval stage of cestodes which develops from the hydatid cyst. The stage begins when a clustering of cells emerge from the germinal layer of hydatid cysts. The buds elongate and the cells at their bases seem to diminish in number. Very early on a furrow appears in the elongated buds, delimiting anterior (scolex) and caudal (body) regions. Hooks are the first fully-differentiated structures formed at the apical region of the nascent scolex. A cone can later be seen at the center of the hooks, the body is expanded and a structured neck is evident between the scolex and the body. During protoscolex development this parasitic form remains attached to the germinative layer through a stalk. When fully differentiated, the stalk is cut off and the infective protoscolex is now free in the hydatid fluid. This stage ends when the protoscolex attaches, via the scolex, to the host intestinal tissue and begins to develop into a adult.		protoscolex stage	WBls:0000715
	A six-hooked larva, called the hexcanth, enclosed by one or two embryonic envelopes. This stage invades the first (or sole) intermediate host where it develops into a bladder larva, such as a hydatid cyst.		oncosphere	WBls:0000713