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Short Note: Circumpolar distribution of the pycnogonid-ectoparasitic gastropod Dickdellia labioflecta (Dell, 1990) (Mollusca: Zerotulidae)

  • Stefano Schiaparelli (a1), Marco Oliverio (a2), Marco Taviani (a3), Huw Griffiths (a4), Anne-Nina Lörz (a5) and Giancarlo Albertelli (a6)
  • DOI: http://dx.doi.org/10.1017/S0954102008001302
  • Published online: 01 May 2008
Abstract

The Antarctic gastropod Dickdellia labioflecta (Dell, 1990) (originally described as Laevilittorina (Corneolittorina) labioflecta) is an obligate parasite of pycnogonids, which exploits their body fluids through the cuticular gland holes (Lehmann et al. 2007) and lays its eggs on the pycnogonid's legs where embryos complete their life cycle (Hedgpeth 1964, Sirenko 2000, Lehmann et al. 2007). The ecology of D. labioflecta appears to be unique, as no other examples of such a specialized parasitic behaviour on pycnogonids are known. This life-style and the related anatomical specializations (gut and digestive gland morphology), prompted the erection of a new genus, Dickdellia Warén & Hain, 1996 provisionally included in the family Zerotulidae (Warén & Hain 1996). Although information is quite scant, to date, two pycnogonid host species are known for Dickdellia: Colossendeis megalonyx megalonyx Fry & Hedgpeth, 1969 (Lehmann et al. 2007) and Nymphon isabellae Turpaeva, 2000 (Sirenko 2000).

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Corresponding author
*steschia@dipteris.unige.it; schiaparelli.mna@unige.it
Linked references
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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

T. Lehmann , J.P. Gailer , R.R. Melzer & E. Schwabe 2007. A scanning-electron microscopic study of Dickdellia labioflecta (Dell, 1990) (Gastropoda, Littorinoidea) on Colossendeis megalonyx megalonyx Fry and Hedgpeth, 1969 (Pycnogonida, Colossendeidae): a test for ectoparasitism. Polar Biology, 30, 243248.

K. Linse , H.J. Griffiths , D.K.A. Barnes & A. Clarke 2006. Biodiversity and biogeography of Antarctic and sub-Antarctic mollusca. Deep-Sea Research II, 53, 9851008.

P. Rehm , S. Thatje , U. Mühlenhardt-Siegel & A. Brandt 2007. Composition and distribution of the peracarid crustacean fauna along a latitudinal transect off Victoria Land (Ross Sea, Antarctica) with special emphasis on the Cumacea. Polar Biology, 30, 871881.

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Antarctic Science
  • ISSN: 0954-1020
  • EISSN: 1365-2079
  • URL: /core/journals/antarctic-science
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