Zerconidae

• Main Authors: Díaz-Aguilar, Irma, Ujvári, Zsolt
• Format: Text
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Mesostigmata; Zerconidae; Canada; Sav’; Faroes; Mite
• Online Access: https://dx.doi.org/10.5281/zenodo.6205963; https://zenodo.org/record/6205963

Key to the females of the Nearctic genera of Zerconidae 1. Peritrematal shield with a single pair of setae .....................................................................Monozercon Błaszak, 1984 - Peritrematal shield with more than one pair of setae.................................................................................................... 2 2. Peritrematal shield with two pairs of setae................................................................................................................... 3 - Peritrematal shield with three pairs of setae............................................................................................................... 18 3. Peritrematal shield posteriorly truncated...................................................................................................................... 4 - Posterolateral ends of peritrematal shield expanded posteriorly.................................................................................. 8 4. Peritrematal setae p 1 short and smooth, p 2 elongate and pilose.................................................................................. 5 - Both peritrematal setae short and smooth..................................................................................................................... 6 5. Peritrematal shield narrowly separated from dorsal shield; adgenital sclerites absent.... Mixozercon Halašková, 1963 - Peritrematal shield widely separated from dorsal shield; adgenital sclerites present............ Zercon C. L. Koch, 1836 6. Ventri-anal shield divided into three lobes by a pair of deep lateral incisions.................. Macrozercon Błaszak, 1976 - Ventri-anal shield without lateral incisions................................................................................................................... 7 7. Peritrematal shield narrowly separated from dorsal shield; ventri-anal shield expanded anterolaterally; margin of opisthonotum with seven pairs of setae; dorsal cavities absent............................................ Lindquistas Błaszak, 1981 - Peritrematal shield widely separated from dorsal shield; ventri-anal shield not expanded anterolaterally; margin of opisthonotum with eight pairs of setae; dorsal cavities present and conspicuous ................... Bledas Halašková, 1977 8. Peritrematal setae approximately uniform, both short and smooth.............................................................................. 9 - Peritrematal setae diverse in form.............................................................................................................................. 11 9. Posterolateral ends of peritrematal shield free ........................................................................... Bakeras Błaszak, 1984 - Posterolateral ends of peritrematal shield fused to ventri-anal shield........................................................................ 10 10. Adgenital sclerites present, with two pores ........................................................ Blaszakiella Sikora & Skoracki, 2008 - Adgenital sclerites absent, only a single opening of gv 2 present....................................... Microzercon Błaszak, 1976 11. Peritrematal setae p 1 pilose, p 2 short and smooth...................................................................................................... 12 - Peritrematal setae p 1 short and smooth, p 2 longer..................................................................................................... 15 12. Posterolateral ends of peritrematal shield connected to ventri-anal shield........................ Cosmozercon Błaszak, 1981 - Posterior ending of peritrematal shield free................................................................................................................ 13 13. Peritremes extremely long, reaching beyond the insertion of p 2....................................... Echinozeron Błaszak, 1976 - Peritremes medium-sized, not reaching the level of p 2.............................................................................................. 14 14. Posterolateral ends of peritrematal shield separated by a narrow slit, as a pair of free ventro-lateral shields; margin of opisthonotum with nine pairs of setae...................................................................................... Krantzas Błaszak, 1981 - Free ventro-lateral shields absent; margin of opisthonotum with eight pairs of setae.......... Allozercon Błaszak, 1984 15. Margin of opisthonotum usually with 16 pairs of setae .................................................. Caurozercon Halašková, 1977 - Margin of opisthonotum with eight pairs of setae...................................................................................................... 16 16. Adgenital sclerites present ................................................................................................... Hypozercon Błaszak, 1981 - Adgenital sclerites absent........................................................................................................................................... 17 17. Peritrematal setae p 2 smooth; one pair of adgenital gland openings present; ventri-anal shield with 17 setae (Vl 1 present) ........................................................................................ Paleozercon Błaszak, Cokendolpher & Polyak, 1995 - Peritrematal setae p 2 pilose; adgenital gland openings absent; ventri-anal shield with 15 setae (Vl 1 absent)............. .................................................................................................................................................... Boreozercon gen. nov. 18. Peritrematal shield posteriorly truncated .................................................................... Skeironozercon Halašková, 1977 - Posterolateral ends of peritrematal shield expanded posteriorly................................................................................ 19 19. Setae p 1 and p 2 pilose; adgenital sclerites and gland openings absent .....................................Aspar Halašková, 1977 - Setae p 1 and p 2 smooth; 2–3 pairs of adgenital gland openings on conspicuous adgenital sclerites present............ 20 20. Posterior margin of opisthonotum with six pairs of setae .................................................. Parhozercon Błaszak, 1981 - Posterior margin of opisthonotum with seven pairs of setae .............................................. Parazercon Trägårdh, 1931 : Published as part of Díaz-Aguilar, Irma & Ujvári, Zsolt, 2010, New zerconid mites (Acari: Mesostigmata: Zerconidae) from Canada, with a review of the genus Mixozercon Halašková, 1963, pp. 1-29 in Zootaxa 2555 on page 26, DOI: 10.5281/zenodo.196913 : {"references": ["Blaszak, C. (1984) Three new genera of zerconid mites (Acari, Mesostigmata, Zerconidae) from the United States of America with a key to the American genera. Polish Journal of Entomology, 53, 587 - 601.", "Halaskova, V. (1963) Mixozercon, n. g., a new genus of the family Zerconidae (Acari). Acta Universitatis Carolinae - Biologica, 2, 203 - 208.", "Koch, C. L. (1836) Deutschlands Crustaceen, Myriapoden und Arachniden: In: Panzer, G. W. F. (Ed.), Herrich-Schaeffer's ein Beitrag zur deutschen Fauna, Heft 4. F. Pustet, Regensburg.", "Halaskova, V. (1977) A revision of the genera of the family Zerconidae (Acari: Gamasides) and descriptions of new taxa from several areas of Nearctic Region. Studie C SAV, Praha, 7, 1 - 74.", "Sikora, B. & Skoracki, M. (2008) Blaszakiella americana gen. et sp. nov. A new zerconid mite (Acari: Zerconidae) from North America. Annales Zoologici, 58, 251 - 254.", "Blaszak, C., Cokendolpher, J. C. & Polyak, V. J. (1995) Paleozercon cavernicolus, n. gen., n. sp., fossil mite from a cave in the Southwestern U. S. A (Acari, Gamasida: Zerconidae), with a key to Nearctic genera of Zerconidae. International Journal of Acarology, 21, 253 - 259.", "Tragardh, I. (1931) Terrestrial Acarina. Zoology of the Faroes, 2 (49), 1 - 69."]}