Checklist for Class Arachnida Lamarck, 1801 (Arachnids) and region Montgomery County (Maryland, USA)
List of families for Montgomery County (Maryland) 17 Families width 23 Species | Amaurobiidae Thorell, 1870 | Amaurobiids | 1 | Species | Taxom | | Ascidae Oudemans, 1905 | | 0 | Species | Taxom | | Araneidae Simon, 1895 | Golden orb web spiders | 3 | Species | Taxom | | Segestriidae Simon, 1893 | Six-eyed Spiders | 1 | Species | Taxom | | Cunaxidae Thor, 1902 | Predatory Mites | 1 | Species | Taxom | | Tetranychidae Donnadieu, 1875 | Spider mites | 2 | Species | Taxom | | Amblyommidae Banks, 1907 | | 1 | Species | Taxom | | Dermanyssidae Kolenati, 1859 | Dermanyssid mites | 1 | Species | Taxom | | Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 1 | Species | Taxom | | Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 5 | Species | Taxom | | Uloboridae Thorell, 1869 | Cribellate orb weavers | 1 | Species | Taxom | | Phalangiidae Latreille, 1802 | Daddy-Long-Legs | 1 | Species | Taxom | | Macronyssidae Oudemans, 1936 | Macronyssid Mites | 1 | Species | Taxom | | Pholcidae (C. L. Koch, 1851) | Carpenter spider | 1 | Species | Taxom | | Linyphiidae Blackwall, 1859 | Dwarf spiders | 1 | Species | Taxom | | Sironidae Simon, 1879 | | 1 | Species | Taxom | | Acaridae Latreille, 1802 | Acarid mites | 1 | Species | Taxom |
Genera for Montgomery County (Maryland) 22 Genera with 23 Species #ABCDLMOPST
| Amaurobius Koch, 1830 | | 1 | Species | Taxom | Arctoseius Thor, 1930 | | 0 | Species | Taxom | | Argiope Audouin, 1833 | Garden orbweavers | 1 | Species | Taxom | | Ariadna Audouin, 1842 | | 1 | Species | Taxom | | Armascirus Den Heyer, 1881 | | 1 | Species | Taxom | | Bryobia Koch, 1835 | | 1 | Species | Taxom | | Cyclosa Menge, 1772 | Three-lobed Spiders | 1 | Species | Taxom | | Dermacentor Koch, 1821 | Dog Ticks | 1 | Species | Taxom | | Dermanyssus Dugès, 1923 | | 1 | Species | Taxom | | Drassyllus Chamberlin, 1904 | | 1 | Species | Taxom | | Latrodectus Walckenaer, 1841 | Black widow spider | 1 | Species | Taxom | | Mastophora Holmberg, 1955 | Angling spiders | 1 | Species | Taxom | | Octonoba Opell, 1880 | | 1 | Species | Taxom | | Opilio Herbst, 1778 | | 1 | Species | Taxom | | Ornithonyssus Sambon, 1913 | | 1 | Species | Taxom | | Parasteatoda Archer, 1841 | Comb-Clawed Spider | 1 | Species | Taxom | | Pholcus Walckenaer, 1775 | | 1 | Species | Taxom | | Pityohyphantes Simon, 1850 | Hammock Spiders | 1 | Species | Taxom | | Siro Latreille, 1963 | | 1 | Species | Taxom | | Steatoda Sundevall, 1802 | False black widows | 3 | Species | Taxom | | Tetranychus Dufour, 1836 | | 1 | Species | Taxom | | Tyrophagus Oudemans, 1949 | | 1 | Species | Taxom |
Species list for Montgomery County (Maryland) 23 Species | Amaurobius ferox Walckenaer, 1830 | Black lace-weaver | | Argiope aurantia Lucas, 1833 | American garden spider | | Ariadna bicolor Nicholas Mar..., 1842 | | | Armascirus taurus Kramer, 1881 | | | Bryobia (Bryobia) praetiosa (C. L. Koch, 1835) | ⇒ Bryobia macrotibialis Mathys, 1962 | | Cyclosa conica Pallas, 1772 | Conical Trashline Orbweaver | | Dermacentor variabilis Say, 1821 | American dog tick | | Dermanyssus (Dermanyssus) americanus Ewing, 1923 | American bird mite | | Drassyllus aprilinus Banks, 1904 | | | Latrodectus geometricus C. L. Koch, 1841 | Brown black widow | | Mastophora hutchinsoni Willis J. Ge..., 1955 | | | Octonoba sinensis Simon, 1880 | | | Opilio parietinus De Geer, 1778 | | | Ornithonyssus bacoti Hirst, 1913 | Mite | | Parasteatoda tepidariorum C. L. Koch, 1841 | American house false widow spider | | Pholcus phalangioides (Fuesslin, 1775) | ⇒ Smeringopus pallidus Blackwall, 1858 | | Pityohyphantes costatus Nicholas Mar..., 1850 | Hammock spider | | Siro exilis Hoffman, 1963 | | | Steatoda borealis Nicholas Mar..., 1850 | Boreal Combfoot | | Steatoda grossa C. L. Koch, 1838 | Brown house spider | | Steatoda triangulosa Walckenaer, 1802 | Triangulate bud spider | | Tetranychus (Tetranychus) urticae C. L. Koch, 1836 | Carmine spider mite | | Tyrophagus (Tyrophagus) similis Volgin, 1949 | Grassland mite |
Subnodes of Arachnida with occurrences in Montgomery County (Maryland)
 | | Arachnida (Lamarck 1801) |
Links, sources and further information Arachnida at biolcoll.utu.fi Arachnida at wiki.spinnen-forum.de Arachnida at spiderling.de Arachnida at wsc.nmbe.ch Arachnida at artfakta.se Arachnida at biodiversity.org.au Arachnida at dyntaxa.se Arachnida at gbif.org Arachnida at irmng.org Arachnida at itis.gov Arachnida at marinespecies.org
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