World Congress of Malacology Antwerp ... - Unitas Malacologica

spermatophore morphology of Napaeus pruninus in S. Miguel has pointed out to possible
relationships of some populations with species of neighboring islands, viz,: those of the central-south
with N. tremulans (Mousson, 1858) from Santa Maria; those of the western portion, namely from
Sete Cidades complex, with N. alabastrinus (Morelet, 1860) from Terceira, one of Morelet’s varieties
later elevated to specific status; and the remaining eastern portion apparently showing intermediate
morphology.
The present work intends to contribute to the clarification of the taxonomic meaning of the
morphological variability of N. pruninus in S. Miguel and of the so-called hybrids, using partial
sequence data from the 16S rRNA mtDNA gene.
A review of the genus Satondella Bandel, 1998 (Gastropoda, Scissurellidae)
Luque, Ángel A. 1 ; Geiger, Daniel L. 2 ; Rolán, Emilio 3
1. Laboratorio de Biología Marina, Departamento de Biología, Universidad Autónoma, C/ Darwin, 2,
28049 Madrid, Spain,
Email: angel.luque@uam.es
2. Santa Barbara Museum of Natural History-Invertebrate Zoology, 2559 Puesta del Sol Road, Santa
Barbara, CA 93105, USA,
Email: geiger@vetigastropoda.com
3. Museo de Historia Natural, Universidad de Santiago de Compostela, Santiago de Compostela,
Spain,
Email: erolan@emiliorolan.com
The genus Satondella Bandel, 1998 is currently known from three species: Satondella minuta Bandel,
1998, from Indonesia (type species); S. tabulata (Watson, 1886), from the Caribbean Sea, and S.
senni Geiger, 2003, from Easter Island. We found four new species among material in various
museum collections.
The range of Satondella minuta is extended to Fiji, Solomon Islands, New Caledonia and S.
Queensland (Australia). Satondella tabulata, described from Culebra Island (Puerto Rico), is here
recorded from Bermuda, Florida, Bahamas, the Gulf of Mexico and throughout the whole Caribbean.
Sinezona brasiliensis Mattar, 1987, described from Amapá (North Brazil) and recorded south to São
Paulo, is probably a junior synonym of S. tabulata. The radula of Satondella tabulata is described,
the first for the genus.
Satondella n. sp. 1, from New Caledonia, the Loyalty and Solomon Islands, differs from S. minuta by
having a protoconch with weak spiral sculpture and more numerous axial ribs. Satondella n. sp. 2
from Christmas Islands, New Caledonia, Loyalty Islands and Vanuatu differs from S. tabulata by a
sunken smooth protoconch, instead of a flat one with microhexagonal sculpture, less axial ribs on
teleoconch 2 and more numerous spiral cords. Satondella n. sp. 3, from New Caledonia differs from
all other species by the strong axial protoconch sculpture. Satondella 4, from Loyalty Islands and
New Caledonia, has a much higher number of axial ribs on teleoconch 1 and 2 than any of the
precedent species, and it is the only species with elevated protoconch.
Material from all Satondella species is quite scarce; empty shells come from medium depths (50-700
m, shells from greater depths probably fallen from shallower waters), and only some specimens of
two species has been caught alive between 15 and 56 m (Satondella tabulata) and 140–182 m
(Satondella n. sp. 2).
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