Jd. Kerr et Gb. Wiggins, A COMPARATIVE MORPHOLOGICAL-STUDY OF LATERAL-LINE SYSTEMS IN LARVAE AND PUPAE OF TRICHOPTERA, Zoological journal of the Linnean Society, 115(2), 1995, pp. 163-184
The abdominal lateral line system in Trichoptera, consisting of filame
nts and lamellae with associated primary and secondary setae, was stud
ied in larvae and pupae of 70 genera representing 26 families. Filamen
ts are slender, generally bifid, tubular extensions of the cuticle tha
t together form a fringe on the lateral abdominal surface of larvae an
d pupae of many but not all families of case-making Trichoptera (Integ
ripalpia). Larvae and pupae of the Annulipalpia and Spicipalpia lack a
lateral fringe of bifid filaments, but single filaments occur in larv
ae of a few unrelated genera. A lateral fringe may help in regulating
the now of water which is maintained through the case by abdominal und
ulation. Lamellae occur only in larvae of the Integripalpia, where the
y are variously distributed among families and genera, and probably ha
ve a sensory function. Three types of lamellae are recognized: forked,
serrate and single. Filaments and lamellae have significant taxonomic
value, and their patterns of occurrence raise questions about the phy
logeny of Trichoptera. (C) 1995 The Linnean Society of London