Abstract
Parastenocaris hispanica n. sp. is described from hyporheic groundwaters in Spain. The phylogenetic position of the new species within the fontinalis-group Lang is discussed. As a result P. fontinalis meridionalis Rouch is elevated to species rank. The fontinalis-group is characterized by six autapomorphic characters.
Highlights
(3) Male P3 exopod portion of segment 1 without spinules on inner margin; 2 spinules are present in adult P. aquaeductus and in the fifth copepodid stage of P. hispanica (Fig. 4F), while these spinules get lost with the moult to the adult
Assuming the extinction of most groundwater organisms due to the formation of permafrost in the soil during glacial times, we may conclude a colonization of this areas after glaciation by a sub-population of P. fontinalis that was better adapted to cold conditions
Some structures present in P. aquaeductus appear in P. hispanica n. sp. during ontogenetic development and are secondarily lost with the final moult to the adult
Summary
Universität Oldenburg, Keywords: Harpacticoida, Parastenocaris hispanica, new species, fontinalis-group, F ontinalicaris, taxonomy, phylogeny, zoogeography. Abstract (Lang, 1948) and is described here in the first of a series of contributions to the systematic s. The phylogenetic position of the new species within the fontinalis-group Lang is discussed. As a result P. fontinalis meridionalis Rouch is elevated to species. Discussions about affinities of the known species are based on the assignment of these species to different "phyletic" groups (Lang, 1948). In order to elucidate the phylogenetic positf ion oo f the newlyn discovered- species, the tinaislci has racte- rizg ed anr d po hylogu enetp ically de aguas subterráneas de España y se discute su posición filogenética dentro del grupo -fontinalis Lang. P. fontinalis meridionalis Rouch debe ser elevado a categoría systematics as defined by Hennig (1982)
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