Unique ‘spring-loaded’ gnathopod in the recently re-discovered and highly range-restricted estuarine amphipod Quadrivisio aviceps     

C Griffiths  J Landschoff 《African Journal of Marine Science》2018,40(2):219-224

The amphipod Quadrivisio aviceps (KH Barnard 1940), previously known from just three records collected at two small estuaries in the Western Cape, South Africa, was re-discovered at one of the original collection sites (the Palmiet River lagoon). The population at the second site (the Klein River estuary) appears to have died out, and surveys of other nearby estuaries failed to detect any additional populations. The species thus now appears to be restricted to a few hundred metres within a single small estuary, making it perhaps South Africa's most range-restricted marine crustacean. The gnathopod 2 of males has an extremely unusual shortened and elbowed dactyl, as well as a newly discovered and unique horseshoe-shaped ‘spring’ of elastic resilin tissue inserted within the muscles of the propodus. The function of the structure could not be confirmed, but it is thought to be a previously unknown vibration or sound-generating mechanism.  相似文献   

The concentrations of “aluminosilicates” in particulates from some surface waters of the world ocean     

R. Chester  D. Cross  A. Griffiths  J.H. Stoner 《Marine Geology》1976,22(3):M59-M67

The concentrations of aluminium, and of “aluminosilicates”, have been determined in 56 centrifuge-collected total-particulate samples from “open-ocean” and “coastal” surface waters.The average percentages of “aluminosilicates” in the particulates have been tentatively related to the supply of land-derived solids to the oceans. The China Sea, which receives a relatively large input of river-transported solids from the mainland of Asia, has particulates which contain an average of 62% “aluminosilicate” material. The eastern margins of the North Atlantic have a relatively large input of wind-transported solids, and the particulates contain an average of 9.6% “aluminosilicates”. “Open-ocean” areas remote from the land masses have particulates in which, on average, “aluminosilicate” material constitutes ? 5%.  相似文献   

Geological excursions in the harlech dome by P. M. Allen and A. A. Jackson,Classical areas of British geology,British Geological Survey,HMSO, 1985. No. of pages: 94. Price: £4.50 (softback)     

C. J. Griffiths 《Geological Journal》1986,21(2):220-221

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