Littorina nigrolineata (Gray) (Gastropoda, Prosobranchia) = Littorina nigrolineata (Gray) (Gastropoda, Prosobranchia)
Sacchi, C.F. (1975). Littorina nigrolineata (Gray) (Gastropoda, Prosobranchia) = Littorina nigrolineata (Gray) (Gastropoda, Prosobranchia). Cah. Biol. Mar. 16(1): 111-120
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer
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| Abstract |
The author raises to a specific rank L. nigrolineata, so far considered either as a subsp belonging to L. saxatilis (Olivi) group, or an 'unofficial' sp, lacking complete description and, consequently, taxonomic status. A complete re-description of L. nigrolineata is given, founded on a series of anatomical, conchological, physio-ecological and biogeographic characterrs. A fundamental importance is to be attached to the reproductive behaviour. While L. saxatilis is an ovoviviparous sp, showing a large, brood pouch that, whenever sexual maturity is attained, dwarfs the reduced albumen and egg-shell glands, L. nigrolineata is on the contrary an oviparous one, possessing, instead of the brood pouch, a large jelly gland, like the majority of Littorinidae. male organs of L.nigrolineata show less outstanding differences; while, however, in L. saxatilis the intermediate (or glandular) region of the mature penis is fully rimed with adhesive glands, the latter are always limited to the distal part of this region in L. nigrolineata. |
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