FRESHWATER GAMMARUS SPECIES FROM EUROPE, NORTH-AFRICA AND ADJACENT REGIONS OF ASIA (CRUSTACEA-AMPHIPODA) .2. GAMMARUS-ROESELI-GROUP AND RELATED SPECIES
FRESHWATER GAMMARUS SPECIES FROM EUROPE, NORTH-AFRICA AND ADJACENT REGIONS OF ASIA (CRUSTACEA-AMPHIPODA) .2. GAMMARUS-ROESELI-GROUP AND RELATED SPECIES
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DOI:
10.1163/26660644-04702003
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发表时间:
1977-01-01
期刊:
影响因子:
--
通讯作者:
PINKSTER, S
中科院分区:
文献类型:
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作者:
KARAMAN, GS;PINKSTER, S
This part of the revision of the freshwater Gammarus spp. deals with the G. roeseli-group. Members of this artificial group are characterized by the presence of dorsal processes (carinae) on the metasome segments. A historical review is given from the 1st description of G. roeseli and the taxonomic confusion that followed, to the start of this study when 3 spp. and at least 15 ssp. were known. Complete descriptions and many illustrations are given of the males of all species, along with a key for their identification. Where necessary, figures are given of those details in which females differ from the males. G. triacanthus and its many subspecies must be considered synonymous with G. roeseli. G. argaeus stojicevici is raised to specific rank. Four new species (G. goedmakersae, G. mladeni, G. obnixus and G. pavo ) are described, resulting in a total of 7 spp. within this group. In many localities, members of the G. roeseli-group were found together with members of the G. pulex- or G. balcanicus-group. Experimental work on G. roeseli showed that in such cases G. roeseli is more eurybiont than the members of the G. pulex- or G. balcanicus-group (higher resistance against low O2 concentrations and elevated temperatures). Subterranean members of this group have not been found so far. From zoogeographical data, it appears that this group originates from southeastern Europe and Asia Minor. Only in recent times, G. roeseli has penetrated inland waters in western Europe. Members of this group are lacking in northern Europe, the British Isles, Italy and the Iberian Peninsula. For all species, complete lists of all studied localities are given (except for G. roeseli), together with 2 maps in which the distribution is illustrated.