MORPHOLOGY, ONTOGENY, AND INTRASPECIFIC VARIABILITY OF THE YEW BIG BUD MITE,CECIDOPHYOPSIS PSILASPIS(ACARI: ERIOPHYIDAE)

Abstract

All ontogenetic stases of the yew big bud mite, Cecidophyopsis psilaspis (Nalepa), from British Columbia were studied by scanning electron and light microscopy and were compared with an English population of this species. The species was redescribed from the two populations, which were found to be quite similar in general appearance and in most of the morphometric data analyzed. Spermatophores in this species are similar to those observed in other Eriophyoidea. Details of a male spermatophoric organ are described and illustrated for the first time in an eriophyoid mite. Moulting in C. psilaspis is shown to be prodehiscent. The data reported here neither support nor reject the alternative hypothesis that the first active stase is larval versus nymphal. However, to account for the ontogenetic evidence, the first active stase is herein considered larval.

Biology and phenology ofCecidophyopsis psilaspis(Acari: Eriophyidae) on Pacific yew (Taxaceae)

“…Cecidophyopsis psilaspis is widely distributed in Europe on English or common yew, Taxus baccata L. (Taxaceae), and probably occurs in temperate North America wherever this host species has been introduced, as well as throughout the coastal range of Pacific or western yew, Taxus brevifolia Nutt. (Marshall et al 1998). In addition to T. baccata and T. brevifolia, this mite also infests Taxus canadensis (Marsh.…”

“…This is the fourth contribution in a series dealing with C. psilaspis in British Columbia. The earlier papers dealt with damage to host plants (Duncan et al 1997), origin and distribution of the mite (Mitchell et al 1997), and morphology and ontogeny of the mite (Marshall et al 1998).…”

Cecidophyopsis mites harmful to ribes plants, species composition, distribution and association with host plants in Latvia = Janogu gints augiem kaitigo Cecidophyopsis gints pumpurercu sugu sastavs, izplatiba un saistiba ar saimniekaugiem Latvija

“…Šī ir viena no retajām maurērču virsdzimtas ģintīm, kur ērcēm uz prodorsālā vairoga nav setas, kas ir raksturīgi tikai nelielajā Cecidophynae apakšdzimtā (Hall 1967;Amrine, Stasny & Flechtmann 2003). Cecidophyopsis sugām virs galvas esošajam prodorsālajam vairogam raksturīgas gareniskas līnijas Marshall, Clayton & Newsom 1998).…”

“…Ar telpaugiem paredzētajām jukām suga ievesta Polijā, kur laboratorijas apstākļos pētīta šīs sugas bioloģija un uzvedība (Łabanowski 1999;Michalska & Shi 2004;Michalska & Mańkowski 2006). C. hendersoni ar augiem ir ievesta arī Jaunzēlandē, kur 2004. gadā šī ērču suga atrasta uz Yucca guatemalensis Baker (=Yucca elephantipes) (Wilson et al 2004), bet vēlāk uz šiem augiem ērces atrastas arī Ungārijā (Ripka 2008 (Mitchell et al 1997;Lattin 1998;Marshall, Clayton & Newsom 1998;Marshall & Clayton 2004;Skoracka, Lewandowski & Boczek 2005;Kollár 2011 , Fenton et al 1995, 2001. Latvijā gandrīz katrā upeņu stādījumā (Grosa 1981).…”

“…Ērču attīstība un paaudžu maiņa notiek paralēli, tādēļ vienlaicīgi var būt novērojamas dažāda vecuma ērces. Tas novērots arī uz īvēm dzīvojošajai sugai C. psilaspis, kad dažāda vecuma ērču indivīdu ķermenis nedaudz atšķiras (Marshall, Clayton & Newsom 1998). Domājams, ka pieaugušām ērcēm prodorsālā vairoga līniju pazīmes ir izteiktākas nekā nepieaugušām ērcēm, jo pieaugušām ērcēm šīs līnijas ir pabeigušas attīstīties un ir vairāk hitinizētas.…”