Ciao Nini!
Quanto "mastichi" l'inglese?
una veloce ricerca in google sotto "scutopoda" dà una serie di siti, tipo il

seguente, dal quale ho copiato un breve estratto, con il riferimento
bibliografico in calce

Salvini-Plawen and the Neontological Perspective
Salvini-Plawen [1980) provided a reconsideration of the phylogenetic
relationships among the various molluscan groups by studying various
extant forms, including the little known soft-bodies vermiform types that
had previously been called "Aplacophora" and lumped with the chitons
under the now rejected class "Amphineura". On the basis of this analysis
he proposed a phylogenetic line by which an original archi-mollusc gives
rise to the main Conchiferan groups as well as a number of side-
branches. All in all there are four stages of progressive differentiation.
The first has an early side branch called the Scutopoda dividing from the
main line, and eventually becoming the Caudofoveata (a class of
Aplacophora). The other line is represented by the Adenopeda, which
include the ancestors of all other mollusks. From the Adenapoda the
shell-less Solenogastres (the second class of Aplacophora) separate from
the shell-bearing Testaria. Within the Testaria the Polyplacophora, or
"Placophora", divide from the Conchifera. Finally, the Conchiferan
ancestor gives rise to the various extant classes, along with the extinct
Galeroconcha (Monoplacophora plus Bellerophontida, the latter here
considered to be untorted). The Aplacophora are rejected, as the
Placophora and Solenogastres are tied together by a number of shared
unique characteristics (synapomorphies), in contrast to the merely
symplesiomorphic (shared primitive) characters in Solenogastres and
Caudofoveata.

Salvini-Plawen, L. v. 1980. A reconsideration of systematics in the
Mollusca. (phylogeny and higher classification) Malacologia, 19: 249-278.

Nessun problema!
Successo anche a me: cercavo qualcosa "disperatamente" ... e poi un amico
al quale avevo chiesto aiuto mi fa: "Ho fatto una veloce ricerca su Google ..."
e mi ha trovato una tesi fenomenale, che calza abbastanza bene quello che
cercavo e chissà perché non trovavo!

A volte forse è proprio che si cerca troppo "disperatamente" ...
ok, inizio a filosofeggiare
... meglio tagliar corto!
In bocca al lupo per gli studi!