Family Trachytidae Trägårdh, 1938

Polyaspinus Berlese, 1916

• Polyaspinus cylindricus Berlese, 1916

• Original name: Polyaspinus cylindricus Berlese, 1916 .

• In: Redia, 12: 134.

Irish Records: Under log on riverbank (Halbert, 1923); nest of herring gull ( Larus argentatus) (Turk & Turk, 1952).

Counties: Wexford, Wicklow.

Trachytes Michael, 1894

• Trachytes aegrota (Koch, 1841)

• Original name: Celaeno aegrota Koch, 1841 .

• In: Deutschlands Crustaceen, Myriopoden und Arachniden. 1835–1844. Regensburg, fasc. 32 (5).

• Combinations/variations used in Irish literature: Trachytes pyriformis Kramer (Halbert, 1923) .

Irish Records: Under branches and pieces of wood on river bank (Halbert, 1923); in coniferous forest and rough grazing (Arroyo et al., 2009); soil under oak and Scots pine; moss on soil under Sitka spruce; bark of Scots pine; moss on Scots pine and Sitka spruce (Arroyo et al., 2010, 2012, 2013a); in soil under Sitka spruce, Pacific Silver Fir, monkey puzzle and eucalyptus (unpublished data).

Counties: Clare, Galway, Laois, Sligo, Tipperary, Wexford, Wicklow.

• Trachytes minima Trägårdh, 1910

• Original name: Trachytes minima Trägårdh, 1910

• In: Naturwissenschaften Untersuchungen Sarekgeberg, 4: 448.

Irish Records: Soil under Norway spruce (Heneghan, 1994; Heneghan & Bolger, 1996b); fungal fruiting body (unpublished data); moss under Sitka spruce and moss on oak (Arroyo et al., 2012, 2013a).

Counties: Kilkenny, Sligo, Wicklow.

• Trachytes oudemansi Hirschmann & Zirngiebl-Nicol, 1969

• Original name: Trachytes oudemansi Hirschmann & Zirngiebl-Nicol, 1969

• In: Acarologie, Schriftenreihe für Vergleichende Milbenkunde, 42: 36.

Irish Records: Fungal sporocarp (O’Connell, 1994).

Counties: Kilkenny.

• Trachytes pauperior Berlese, 1914

• Original name: Trachytes pi var. pauperior Berlese, 1914 .

• In: Redia, 10: 135.

• Combinations/variations used in Irish literature: Trachytes pi Berl., var pauperior Berl. (Halbert, 1923) .

Irish Records: Under decaying wood (Halbert, 1923). Counties: Wicklow.

Uroseius Berlese, 1888

• Uroseius acuminatus (Koch, 1847)

• Original name: Uropoda acuminatus Koch, 1847

• In: Kritische Revision Der Insektenfaune Deutschlands Nach Dem System, 3: 260.

Irish Records: Decaying cabbage and decaying potatoes (Halbert, 1923).

Counties: Wicklow.