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Eriocampa tulameenensis
''Eriocampa tulameenensis'' is an extinct species of sawfly in the family Tenthredinidae that is known from early to early middle Eocene lake deposits near the small community of Princeton, British Columbia in the Similkameen region.
==History and classification==
''Eriocampa tulameenensis'' is known only from one fossil, the holotype, number "GSC No. 22688". It is a single, mostly complete adult of undetermined sex, preserved as a compression fossil in fine grained shale.〔 The shale specimen is from deposits along the Canadian Pacific rail line in the Similkameen Country of British Columbia, Canada. The type specimen is currently preserved in the Geological Survey of Canada paleoentomological collections in Ottawa, Ontario, Canada. ''E. tulameenensis'' was first studied by Dr Harington M. A. Rice of the Geological Survey of Canada, with his 1968 type description being published in the Geological Survey of Canada professional paper number 67-59.〔 The specific epithet ''tulameenensis'' was coined in reference to the Tulameen River near where the fossil was collected in 1957.〔
''Eriocampa tulameenensis'' is the largest species of ''Eriocampa'' to be described in the type paper, though the dismembered condition of the body made measurement unpractical. Due to the preservation condition Harington M. A. Rice noted the assignment of the species to ''Eriocampa'' as tentative and based on the similarities of the fore wing to other members of the genus. The single known specimen possesses a head, part of the thorax and posterior areas of the abdomen which are dark brown to black. Where they are visible the antennae are filiform and brown to dark brown. The central segments of the abdomen appear to have been pale colored. The well preserved wings are hyaline with dark brown to dark amber veins. Unfortunately the specimen is missing portions of its legs and antennae. ''E. tulameenensis'' is distinguished from members of the related genus ''Pseudosiobla'' in general and ''P. campbelli'' found in the related lake deposits near Horsefly, British Columbia by several features, ''E. tulameenensis'' is notably smaller than members of ''Pseudosiobla'' and the fore wing vein patterning is distinct.〔
There are six other described species of ''Eriocampa'' from the fossil record, ''E. bruesi'', ''E. celata'', ''E. pristina'', ''E. scudderi'', ''E. synthetica'', and ''E. wheeleri''. All are described and known only from specimens found in the younger Florissant Formation of Colorado which, at 39 million years old, is younger in age then the Princeton locality, dated to approximately 49 million years old. ''E. tulameenensis'' can be distinguished from all the younger species in that ''E. tulameenensis'' is the largest species of the seven.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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