Somatic musculature in trematode hermaphroditic generation

Table 2 Musculature of the body wall

Species	Stage	Layers and groups of muscle fibers
Cotylurus cornutus	Cerc	cm		lm	al	dm
Cotylurus cornutus	Cerc	cm		ar	+aum	dm
Saguinicola sp.	Cerc	cm		lm		dm
Fellodistomum fellis	Cerc	cm	ar	lm		dm	al
Fellodistomum fellis	Cerc	cm	pr	lm		ium	al
Gymnophallus sp.	Mc	cm	ar	lm	al	dm
		vcm	pr	kcm		ium-1
		vcm	pr	kcm		ium-2
Neophasis lageniformis	Mc	cm	ar	lm	al	dm
Neophasis lageniformis	Mc	cm	pr	lm	+aum	ium
Himasthla elongata	Cerc	cm	ar	lm	al	dm
			pr			dm
			pcom			ium
Cryptocotyle lingua	Cerc	cm		lm		dm
Cercaria parvicaudata	Cerc	cm	ar	lm	al	dm	ium
Cercaria parvicaudata	Cerc	scm	pr	lm	al	dm	ium
Cercaria edgesii	Cerc	cm	ar	lm	al	dm
Cercaria edgesii	Cerc	cm	ar	lm	+aum	ium
Microphallus claviformis	Cerc	cm		lm		dm

Layers are ordered from left to right starting with the outmost. Cerc – cercariae; Mc – metacercariae. al – anteriolateral muscle fibers; ar – anterioradial muscle fibers; aum – U-shaped group of muscle fibers within the group of anteriolateral muscle fibers; cm – circular muscle fibers; dm – diagonal muscle fibers; ium – U-shaped group of muscle fibers separate from the anteriolateral fibers; kcm – ring of muscle fibers surrounding the ventral knob; lm – longitudinal muscle fibers; pcom – oblique muscle fibers of the precollar region; pr – posterioradial muscle fibers; scm – semicircular muscle fibers; vcm – ring of muscle fibers surrounding the ventral sucker opening

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