无前恙螨属二新种(蜱螨目:恙螨科)  

Two new species of genus Walchia(Acarina: Trombiculidae)

作　　者：夏惠[1] 陈兴保[1] 

机构地区：[1]蚌埠医学院,安徽蚌埠233003

出　　处：《华东昆虫学报》2004年第1期10-14,共5页Entomological Journal of East China

摘　　要：本文描述了采自江苏黑线姬鼠体上的无前恙螨属二新种 ,即长盾无前恙螨 Walchia(Walchia)longiscuta Xia et Chen,sp.nov.和孟氏无前恙螨 Walchia(Walchia) meni Xia et Chen,sp.nov.。模式标本保存于复旦大学上海医学院寄生虫学教研室。In this paper, the two new species of trombiculid mites obtained from Apodemus agrarius in Jiangsu province of China in 1963 and 1964 are described. Type specimens are deposited in the Department of Parasitology, Shanghai Medical Collgeg of Fudan University, China.1. Walchia (Walchia) longiscuta Xia et Chen, sp.nov.(Figs 1~5)Living specimen of larva creamy-white in color. The width of posteriorwagin of cheliceral base 21.85μm, and the width of gnathosoma base 48.14μm. SIF=5B-N-3-2101-0000, Id=375.54μm×256.05μm, fP=N.N-NNN, fsp=7-6-6, fcx=1.1.1, fDS=2-6-6-2-6-6-4-4-2=38, fVS=50, Oc=1/1. The scutum narrow and long with an elongate rounded postirior end. There are numerous cuting dot and some obvious un-regulatory sunken trace on it's surface. There is no AM. PL>AL. The measurement of scutum is as follows: AW=34.99, PW= 39.37 , SB=30.62, ASB=20.40, PSB=68.53, AP=40.82, AL=25.50, PL=27.20, S=?. Length of legs(in μm)for Ⅰ 177.30, Ⅱ153.66,Ⅲ 177.30. In comparison with the similar species [Walchia(W.)pointiscuta Chen, 1980], the fllowing characters of this new species can be distinquished from W(W.)pointiscuta: (1) The scutum of this new species is apparently longer than the one of W(W.)pointiscuta, and the posterior end of scutum is bluntly rounded, and there are some obvious sunken trace on it's surface. (2) The measurements of AP and PSB between the two species have obvious differences. (3) The arrangement of dorsal setae is 2-6-6-2-6-6-4-4-2. (4) There is no femur setae on leg Ⅲ. (5) Eye 1+1.Holotype, larva, collected from Apodemus agrarius in Jiangsu province of China in 1964.2. Walchia (Walchia) meni Xia et Chen, sp.nov.(Figs 6-10)When alive, the specimens of larva creaney-white in color. The width of posterior magin of cheliceral base 15.73~15.76μm, and the width of gnathosoma base 33.89~35.75μm. SIF=6B-N-3-2110-0000, Id=287.62~392.62μm ×185.18~286.05μm, fp=N-N.NNN, fsp=7-6-6, fcx=1.1.2, fDS=2-6-6-2-6-4-4-2=32,or 2-6-6-6-6-4-2=32, fVS=42~47, Oc= 0/0 . The scutum smaller with toward post p

关 键 词：无前恙螨属 新种 蜱螨目 恙螨科 

分 类 号：Q969[生物学—昆虫学]