Trechnites Thomson 1876,

Zuparko, Robert L., 2015, Annotated Checklist of California Encyrtidae (Hymenoptera), Zootaxa 4017 (1), pp. 1-126: 52

publication ID

http://dx.doi.org/10.11646/zootaxa.4017.1.1

publication LSID

lsid:zoobank.org:pub:BBFC3D93-6A7E-4862-84EF-021ADE2F4B3A

persistent identifier

http://treatment.plazi.org/id/03CC87E4-FFB7-436F-FF02-C08E8C68FED0

treatment provided by

Plazi

scientific name

Trechnites Thomson 1876
status

 

Trechnites Thomson 1876 

Hosts. Hemiptera  : Psyllidae 

insidiosus ( Crawford 1910: 89)  ( Psylledontus  )

Type. USNM

Distribution. W (Alameda, Butte, Contra Costa, Inyo, Los Angeles, Marin, Mendocino, Mono, Napa, Orange, Placer, Riverside, San Bernardino, San Diego, Santa Barbara, Santa Clara, Santa Cruz, Shasta, Sonoma, Stanislaus, Tulare, Ventura)

Host/habitat. Cacopsylla pyri  , C. pyricola  , C. vasiljevi  , Psylla pyrisuga  , P. sp.

Remarks. Trechnites insidiosus  was described in 1910 in New York, and at the time its only known host was Cacopsylla pyricola  , an Old World species first found in the New World in 1832, and on the west coast in 1939 ( Clausen 1978 b). The parasitoid was first recorded on the West Coast in 1962. During a biocontrol program against C. pyricola  that ran from the 1960 s to the 1980 s, T. psyllae (Ruschka)  was imported into California from Switzerland and southeastern Europe ( Unruh et al. 1995). Recently Guerrieri & Noyes (2009) synonymized T. psyllae  under T. insidiosus  (thereby increasing the host records of the latter). However it is not clear if the presence of T. insidiosus  in California reflects the natural endemic range of a Holarctic species, if it is a Palearctic species that was introduced accidentally when C. pyricola  expanded its range (as suggested by Unruh et al. 1995), or if it became established in California during the biocontrol program starting in the 1960 s.

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Encyrtidae

Loc

Trechnites Thomson 1876

Zuparko, Robert L. 2015
2015
Loc

insidiosus (

Crawford 1910: 89