Volkartia (Volkartia rhaetica)
- Sashen: Ascomycota (Ascomycetes)
- Rarraba: Taphrinomycotina (Taphrinomycotaceae)
- Darasi: Taphrinomycetes
- Matsayi mai mahimmanci: Taphrinomycetidae (Taphrinomycetes)
- Oda: Taphrinales (Taphrines)
- Iyali: Taphrinaceae (Taphrinaceae)
- Halitta: Volkartia (Volkartiya)
- type: Volkartia rhaetica (Volkartia)
Volkartia (lat. Volkartia rhaetica) naman kaza ne na musamman. Ita ce kawai naman gwari na halittar Volkartia. Wannan shine asalin ascomycete fungi (family Protomycium). Wannan naman gwari sau da yawa parasitizes shuke-shuke na genus Skerda.
An gano nau'in nau'in Volkartia kuma R. Mair ya yi amfani da shi a baya a cikin 1909, amma na dogon lokaci yana da kama da jinsin Taphridium. Amma a cikin 1975, wannan nau'in (da naman gwari) ya sake samun 'yancin kai daga Reddy da Kramer. Daga baya an yarda a haɗa a cikin wannan nau'in wasu fungi waɗanda a baya na Taphridium ne.
Ana ɗaukar Volkarthia a matsayin parasite. Naman gwari yana haifar da duhu a cikin ganyen shuka wanda Volcarthia ya shafa. Naman gwari kanta yawanci yana samuwa a bangarorin biyu na ganye. Volkarthia yana da launin toka-fari mai launin toka kuma ya mamaye wani babban yanki na ganyen shuka.
'Yan kalmomi game da tsarin ciki na naman gwari.
Kwayoyin ascogenous suna haifar da tsari na salon salula sosai a ƙarƙashin epidermis. Yawancin lokaci suna da siffar zobe, girman shine 20-30 microns. Suna girma kamar synasci, babu lokacin barci. Shi ne bayyanar synascos wanda ke da mahimmancin fasalin da ke ba mu damar raba Volkarthia daga fungi na nau'in Tafridium. Ana iya la'akari da wurin da kwayoyin halitta ascogenous a matsayin bambanci tsakanin wannan naman gwari da wakilan protomyces, wanda kwayoyin da ke ƙarƙashin epidermis sun warwatse. Ana iya ƙarawa cewa a cikin protomyces, samuwar synasces yana faruwa bayan lokacin barci. Idan muka yi magana game da synasces, to, a cikin Volcarthia suna da silinda, girman su kusan 44-20 µm, kauri na harsashi mara launi yana kusan 1,5-2 µm.
Spores, kamar harsashi, ba su da launi, 2,5-2 µm a girman, zagaye ko ellipsoidal a siffar, na iya zama ko dai madaidaiciya ko mai lankwasa. Ascospores sau da yawa an riga an kafa su a matakin cell ascogenous. Spores suna girma mycelium bayan lokacin barci ya ƙare.
Wannan naman gwari yawanci parasitizes Crepis blattarioides ko wasu irin skerda jinsunan.
Ana samun naman gwari a Jamus, Faransa, Switzerland da Finland, kuma yana zuwa a Altai.