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THE VENATION OF THE MATURE NYMPH WING PAD OF EPHEMEROPSIS TRISETALIS EICHWALD (EPHEMEROPTERA: HEXAGENITIDAE)
Author(s) -
Lin Qibin,
Su Cuirong
Publication year - 1994
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.1994.tb00255.x
Subject(s) - mayfly , nymph , biology , wing , articulation (sociology) , anatomy , paleontology , zoology , politics , political science , law , engineering , aerospace engineering
The complete mature nymph wing pad with distinct venation has been collected from Jiuquan Basin, Northwest China, which is almost without precedent in the fossil history of insect. The venation with large radial and costal fields is considered as archaic feature which very probably represents the primitive stage in the evolution of Ephemeroptera. Furthermore, as compared with the modern adult wing, the stronger articular sclerites in the fossil nymphal wing pad of Ephemeropsis trisetalis probably shows that the reduction of the articulation in modern mayfly wing is a secondarily acquired character.