Gagné Raymond J, Barosh Theresa, Kephart Susan
Systematic Entomology Laboratory, PSI, Agricultural Research Service, U.S. Department of Agriculture, c/o Smithsonian Institution MRC-168, P.O. Box 37012, Washington, DC 20013-7012, USA.; Email:
Graduate Degree Program in Ecology, Colorado State University 563-627 University Avenue, Fort Collins, CO 80523-1177, USA. Department of Biology, Willamette University, 900 State Street, Salem, OR 97301-3931, USA.; Email:
Zootaxa. 2014 Dec 22;3900(2):271-8. doi: 10.11646/zootaxa.3900.2.7.
A new species, Dasineura camassiae Gagné (Diptera: Cecidomyiidae), is described, illustrated and compared to some of its congeners from related hosts and western North America. The new species causes flower galls on Camassia (Agavoideae; Asparagaceae) in the Pacific Northwest. Its current known distribution is Oregon and Washington, USA. Larvae develop in spring in flowers of Camassia spp., causing the young ovaries to enlarge prematurely and eventually abort, without forming seeds or mature fruit. Full-grown larvae crawl out of the gall in rapid succession and drop to the soil where they pupate; they remain there until spring of the following year when the adults emerge and lay eggs. The galls they induce in camas lily buds represent the first known association of the cosmopolitan genus Dasineura with the group of plants that includes Agave and its relatives.
描述、图示并比较了一种新物种——卡马夏达斯奈瘿蚊（Dasineura camassiae Gagné，双翅目：瘿蚊科），并将其与来自相关寄主及北美西部的一些同属物种进行了比较。该新物种在太平洋西北部的卡马夏属植物（龙舌兰亚科；天门冬科）上形成花瘿。其目前已知分布于美国俄勒冈州和华盛顿州。幼虫于春季在卡马夏属植物的花中发育，致使幼嫩子房过早膨大并最终败育，无法形成种子或成熟果实。成熟幼虫相继迅速从瘿中爬出并掉落至土壤中化蛹；它们一直待在那里，直到次年春天成虫羽化并产卵。它们在卡马夏百合花蕾中诱导形成的瘿代表了广布属达斯奈瘿蚊与包括龙舌兰及其近缘植物在内的植物类群之间首次已知的关联。
