Dear colleagues and friends

It is my pleasure to share with you the result of my project on Caenogastropoda
phylogeny, now referent to the architaenioglossans.
The study was part of my PhD dissertation, focusing on representatives of the 3
architaenioglossans superfamilies (Cyclophoroidea, Ampullarioidea and
Viviparoidea). They were compared with some higher caenogastropods, including
an annulariid, land snail, for testing how adaptations to non-marine
environment can producing convergences.
The result was architaenioglossans as a paraphyletic arrangement of basal
caenogastropods.

The reference is:

Simone, L.R.L., 2004. Comparative morphology and phylogeny of representatives of
the superfamilies of architaenioglossans and the Annulariidae (Mollusca,
Caenogastropoda). Arquivos do Museu Nacional (Rio de Janeiro) 64(4): 387-504.

The abstract is:

As part of a larger project on the phylogeny of the Caenogastropoda
superfamilies, a detailed morphological study of 19 non-marine species is
provided, of the following taxa: a) Family Ampullariidae: 1) Pomacea crosseana
(Hidalgo) (from Pantanal, Brazil); 2) P. curumim new species (from Xingu River,
Amazon Basin, Brazil); 3) P. scalaris (Orbigny) (from Pantanal, Brazil); 4) P.
canaliculata (Lamarck) (same); 5) P. lineata (Spix) (several coastal places of
Brazil); 6) P. sordida Swainson (Rio de Janeiro, Brazil); 7) P. bridgesi
(Reeve) (Pará, Brazil) (most published elsewhere); 8) Asolene megastoma
(Sowerby) (Rio Grande do Sul, Brazil); 9) Felipponea neritiniformis (Dall)
(Paraná, Brazil); 10) Marisa planogyra Pilsbry (Pantanal, Brazil); b) Family
Cyclophoridae: 11) Neocyclotus prominulus (Orbigny) (São Paulo, Brazil); 12)
Incidostoma tupy new species (Rondônia, Brazil); 13) Aperostoma branchetiana
(Moricand) (Minas Gerais, Brazil); c) Family Viviparidae: 14) Viviparus
acerosus (Bourguignat) (Hungary); 15) V. contectus (Millet) (same); 16)
Notopala ampullaroides (Reeve) (Australia); 17) N. essingtonensis (Frauenfeld)
(same); 18) Larina cf. stangei (Adams) (same); d) Family Annulariidae: 19)
Annularia sp. (Yucatan, Mexico). Based on this study, 143 characters (192
states) were searched, polarized, and a phylogenetic analysis is performed. The
single obtained cladogram is the following: ((Neocyclotus prominulus (Aperostoma
blanchetiana – Incidostoma tupy)) (((Annularia sp. – Cerithioidea) ((Viviparus
acerosus – V. contectus) ((Notopala ampullaroides – N. essingtonensis) Larina
cf strangei))) (Marisa planogyra (Pomacea crosseana (Felipponea neritiniformis
(P. scalaris (P. curumim (P. lineata ((P. canaliculata – Asolene megastoma) (P.
bridgesi – P. sordida)))))))))), length 251; ci 77; ri 91. A pool of
archaeogastropod characters, the rissooideans-littorinoidean Annularia, and the
Cerithioidea ground plan were used as main outgroups, however the two latter
taxa are operationally included as part of the ingroup. The analysis of
obtained cladogram revealed that the taxon Architaenioglossa is paraphyletic,
grouping 3 branches of basal caenogastropods successively distributed on the
tree as follows: Cyclophoroidea (Cyclophoridae), Ampullarioidea
(Ampullariidae), and Viviparioidea (Viviparidae), since the representatives of
the remainder the caenogastropods (Annularia and Cerithioidea) were terminal in
the ingroup. The current concept of Ampullarioidea (Ampullariidae plus
Viviparidae) was also paraphyletic.

I hope you enjoy it.
Thank you all, Luiz


--
Luiz Ricardo L. Simone, Ph.D.
Museu de Zoologia da Universidade de São Paulo
Cx. Postal 42494
04299-970, São Paulo, SP
Brazil
[log in to unmask]
www.mz.usp.br

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