Turbellarian taxonomic database
Convolutidae Amphiscolops Diagnosis
Color through pigments or symbiotic algae; statocyst may be absent; brain insunk;
frontal gland weak; mouth ventral; rhabdoids may be absent; posterior as a rule with
pronounced posterior lappets; ovaries and testes paired; two genital openings or
they may be manifold; seminal bursa with two or more curved or corkscrew-shaped sclerotised
bursal canals; copulatory organ complex, conical, pyramidal or tubular; a male antrum and
a seminal vesicle may be absent.
[From Winsor L (1990): 795]
Coloured through pigment, concrement, symbiotic algae, or combination thereof (absent
in A. japonicus); statocyst usually present (absent in A. oni); ocelli may be absent; frontal
organ present (undetermined in A. mosaicus and A. zeii); mouth opening ventrally, without
pharynx; brain insunk; posterior end rounded, bilobed, or trilobed, without filaments;
ovaries and testes usually paired (testis unpaired in A. trifurcatus); female gonopore
absent, or, if present, either single or double (two female gonopores are positioned on
either side of a single male gonopore in A. bermudensis); single or double male gonopore
ventral, subterminal or terminal; two or more curved or corkscrew-shaped sclerotised
bursal nozzles; seminal bursa absent, or, if present, either single or double; male copulatory
organ conical or tubular, ciliated, glandular, or both; male antrum and seminal vesicle
may be absent; prostatoid organ, sagittocyst and caudal penis fold absent.
[From Ono R, Kajihara H (2025): 1614]
Notes from synonyms
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