World Congress of Malacology Antwerp ... - Unitas Malacologica

near-complete outline. A conservative model was used to complete the outlines of the latter group.
For comparative purposes, outlines were included in the EFA of illustrated holotypes of the taxa
mentioned above and Margaritina nebrascensis Meek, 1871, which also exhibits anodontine
character. Preliminary study using principle component analysis (PCA) suggests that unidentified
Das Goods mussels can be grouped according to existing fossil “Anodonta” species by shell outline
morphology; however, this species group is likely artificial. L6516 bivalves form at least two groups
after PCA. Shape distribution is potentially sexually dimorphic, amplified by compression of inflated
valves. Das Goods bivalves share both a lack of dentition and environmental preference with modern
anodontine forms, but there is little evidence linking these two groups phylogenetically under the
modern genus Anodonta.
Deep-sea squid behavior: posing in the dark
Bush, Stephanie L. 1,2
1. Department of Integrative Biology, 3060 Valley Life Sciences Building, University of California
Berkeley, CA, USA
2. Monterey Bay Aquarium Research Institute, 7700 Sandholdt Rd., Moss Landing, CA, USA,
Email: sbush@mbari.org
Shallow-water cephalopods exhibit a wide behavioral range during communication and crypsis via
body postures, skin texture, movement and chromatic modifications. However, because 90% of
down-welling light is scattered or absorbed within the upper 150 – 200 m, deep-sea species were
assumed to be limited with regard to these behaviors. Using Remotely Operated Vehicles (ROVs), in
situ behavior of the deep-sea squid, Octopoteuthis deletron (n = 71), was described and catalogued.
This species inhabits open water between 300 – 1900 m and is not known to vertically migrate to
shallower depths. Observations demonstrated that O. deletron has a large and flexible behavioral
repertoire including postures, locomotor components, chromatic variability, ink release, and
bioluminescence comparable to shallow-dwelling cephalopods. Individual O. deletron achieve a
surprising variety of behaviors to attract mates, avoid predation, and acquire food despite inhabiting
dark ocean depths.
Inventoring the marine molluscan fauna of Guanahacabibes Peninsule Biosphere Reserve,
Cuba
Caballer, Manuel 1 ; Ortea, Jesús 2 ; Espinosa, José 3 ; Fernández-Garcés, Raúl 4 ; Moro, Leopoldo 5
1. Área de Ecología, Depto. de CC y TT del Agua y del Medio Ambiente, Universidad de Cantabria,
Spain,
Email: manuelcaballergutierrez@hotmail.com
2. Laboratorio de Zoología. Depto. BOS, Facultad de Biología, Universidad de Oviedo, Spain,
Email: jortea@uniovi.es
3. Instituto de Oceanología, Avda 1ª nº 18406, E. 184 and 186, Rpto. Flores, Playa, La Habana, Cuba
4. laboratory specialist, environmental studies, CITMA, Cienfuegos, Cuba
5. Consejería de Política Territorial y Medio Ambiente, Gobierno de Canarias, Spain,
Email: lmoraba@gobiernodecanarias.org
Before year 2005 just 53 species were recorded in the marine molluscan fauna of Guanahacabibes
Peninsule Biosphere Reserve, Cuba. Now the catalogue includes nearly 700 species, all of them
collected in 9 localities, from 40 m depth to the shore, as a result of 9 expeditions from year 2002 to
2006 in collaboration with the Office of Integral Development of Guanahacabibes that provided all
the infrastructure.
Of them, 74% are Gastropoda, 21 % are Bivalvia, 3 % are Polyplacophora, 1 % are Scaphopoda and
1 % are Cephalopoda. At the moment, 1 Family, 2 Genera and 27 species have been described as new
for Science, additionally, 37 have been recorded as new for the cuban marine molluscan fauna.
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