Phytoptus Dujardin, 1851

Stalažs, Arturs & Turka, Ināra, 2019, Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) of Latvia: an annotated checklist, Zootaxa 4629 (2), pp. 211-236 : 229

Genus: Phytoptus Dujardin, 1851

Phytoptus avellanae Nalepa, 1889

Type data. Corylus avellana L. ( Betulaceae ); Austria.

Host plant records from Latvia. Corylus avellana L., Corylus cornuta Marshall (Betulaceae) .

Relation to plant host. Gall-making (bud galls) ( Rupais 1999; Skoracka et al. 2005).

Bibliographical records from Latvia. Eriophyes avellanae — Eglītis 1956, 1957 ; Rupais 1959 a, 1962, 1964; Spuris 1966, 1974; Namatēva 2007; Phytoptus avellanae — Shevchenko & Rupais 1964 ; Bērziņš 1970b; Rupais 1976 a, 1976b; Sekerskaâ 1982; Rupais 1999; Plīse 2007; Rupais et al. 2014; Stalažs 2014.

Distribution in Latvia. A frequently abundant species found in gardens, parks and amenity plantings ( Rupais 1964, 1976 a, 1976b).

Phytoptus tetratrichus (Nalepa, 1890) , s. l.

Syn. Phytoptus stenoporus (Nalepa, 1918)

Type data. Tilia platyphyllos Scop. (Malvaceae) ; Austria.

Host plant records from Latvia. Tilia cordata Mill. , Tilia ×europaea L., Tilia platyphyllos Scop. (Malvaceae) .

Relation to plant host. Gall-making, erineum and leaf-margin rolling ( Rupais 1999; Skoracka et al. 2005).

Bibliographical records from Latvia. Eriophyes tetratrichus — Eglītis 1956 ; Rupais 1959 a, 1959c, 1960b, 1962; Phytoptus stenoporus — Shevchenko & Rupais 1964 ; Bērziņš 1968; Rupais 1976a; Rupais 1999; Plīse 2007; Rupais et al. 2014; Phytoptus tetratrichus — Rupais 1964 ; Shevchenko & Rupais 1964; Bērziņš 1968; Rupais 1976 a, 1976b, 1999; Plīse 2007; Rupais et al. 2014.

Distribution in Latvia. Frequently abundant species ( Rupais 1976 a, 1976b).

Remarks. It is noted that Phytoptus tetratrichus (Nalepa, 1890) is quite a variable species which causes varying damage symptoms. It requires additional research using molecular analysis (Soika & Kozak 201 1).