Checklist for Class Arachnida Lamarck, 1801 (Arachnids)
and region Berks County (Pennsylvania, USA)
List of families for Berks County
51 Families width 149 Species and 1 Subspecies #TACDMPGESLNOUBVZ
| Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 9 | Species | Taxom | | Agelenidae (C. L. Koch, 1837) | Agelenid Spiders | 4 | Species | Taxom | | Amaurobiidae Thorell, 1870 | Amaurobiids | 2 | Species | Taxom | | Ameroseiidae Evans, 1961 | | 0 | Species | Taxom | | Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 6 | Species | Taxom | | Araneidae Simon, 1895 | Golden orb web spiders | 24 | Species | Taxom | | Dictynidae O. P-Cambridge, 1871 | Dictynid spiders | 2 | Species | Taxom | | Ascidae Oudemans, 1905 | | 1 | Species | Taxom | | Carabodidae Koch, 1837 | | 1 | Species | Taxom | | Miturgidae Simon, 1885 | Long-legged sac spiders | 1 | Species | Taxom | | Cheliferidae Risso, 1826 | | 1 | Species | Taxom | | Chthoniidae Daday, 1888 | | 1 | Species | Taxom | | Clubionidae Wagner, 1887 | Clubiones | 2 | Species | Taxom | | Digamasellidae Evans, 1957 | | 0 | Species | Taxom | | Amblyommidae Banks, 1907 | | 1 | Species | Taxom | | Dermanyssidae Kolenati, 1859 | Dermanyssid mites | 1 | Species | Taxom | | Pisauridae Simon, 1890 | Big wolf spider | 2 | Species | Taxom | | Gnaphosidae (Pocock, 1898) | Flat-bellied ground spiders | 5 | Species | Taxom | | Dysderidae C. L. Koch, 1837 | Dysderid spiders | 2 | Species | Taxom | | Travuniidae Absolon & Kr..., 1932 | | 1 | Species | Taxom | | Eriophyidae Nalepa, 1898 | Blister mites | 1 | Species | Taxom | | Salticidae Blackwall, 1842 | Jumping Spider | 20 | Species | Taxom | | Trombiculidae Ewing, 1929 | Chigger mites | 1 | Species | Taxom | | Linyphiidae (Blackwall, 1859) | Dwarf spiders | 13 | Species | Taxom | | Lycosidae (Lehtinen & H..., 1979) | Ground Spiders | 9 | Species | Taxom | | Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 4 | Species | Taxom | | Anyphaenidae Bertkau, 1878 | Anyphaenid sac spiders | 1 | Species | Taxom | | Ereynetidae Schrank, 1776 | | 1 | Species | Taxom | | Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 2 | Species | Taxom | | Thomisidae Sundevall, 1833 | Crab Spider | 6 | Species | Taxom | | Neobisiidae Chamberlin, 1930 | | 1 | Species | Taxom | | Myobiidae Megnin, 1877 | | 0 | Species | Taxom | | Nemastomatidae Simon, 1872 | | 1 | Species | Taxom | | Demodecidae Nicolet, 1855 | Follicle mites | 1 | Species | Taxom | | Macronyssidae Oudemans, 1936 | Macronyssid Mites | 1 | Species | Taxom | | Oxyopidae Thorell, 1870 | Lynx spiders | 2 | Species | Taxom | | Tetranychidae Donnadieu, 1875 | Spider mites | 2 | Species | Taxom | | Leptolaelapidae Karg, 1978 | | 1 | Species | Taxom | | Parasitidae Oudemans, 1901 | Beetle Mites | 0 | Species | Taxom | | Phalangiidae Latreille, 1802 | Daddy-Long-Legs | 1 | Species | Taxom | | Philodromidae (Thorell, 1870) | False crab spiders | 6 | Species | Taxom | | Pholcidae (C. L. Koch, 1851) | Carpenter spider | 2 | Species | Taxom | | Tanaupodidae Thor, 1935 | | 1 | Species | Taxom | | Acaridae Latreille, 1802 | Acarid mites | 1 | Species | Taxom | | Siteroptidae Martin, 1978 | Siteroptid mites | 1 | Species | Taxom | | Tengellidae Dahl, 1908 | Tengellid spiders | 1 | Species | Taxom | | Atypidae Thorell, 1870 | Atypical tarantulas | 1 | Species | Taxom | | Unionicolidae Oudemans, 1909 | | 0 | Species | Taxom | | Bothriuridae Simon, 1880 | | 1 | Species | Taxom | | Veigaiidae Oudemans, 1939 | | 1 | Species | Taxom | | Zerconidae Berlese, 1892 | | 0 | Species | Taxom |
Genera for Berks County
126 Genera with 149 Species #ACDEFGHLMNOPSTUVWXZ
Achaearanea Strand, 1929 | | 0 | Species | Taxom | | Agelenopsis Giebel, 1846 | American grass spiders | 2 | Species | Taxom | | Amaurobius Koch, 1830 | | 1 | Species | Taxom | Ameroseius Berlese, 1904 | | 0 | Species | Taxom | | Apochinomma Pavesi, 1896 | | 1 | Species | Taxom | | Araneus Clerck, 1847 | Angulate & roundshouldered orbweavers | 7 | Species | Taxom | | Araniella Chamberlin &..., 1847 | Cucumber spiders | 1 | Species | Taxom | | Archaeodictyna Caporiacco, 1871 | | 1 | Species | Taxom | | Argiope Audouin, 1775 | Garden orbweavers | 1 | Species | Taxom | | Asagena Sundevall, 1882 | | 1 | Species | Taxom | | Asca von Heyden, 1963 | | 1 | Species | Taxom | | Callobius Chamberlin, 1846 | Hacklemesh Weaver | 1 | Species | Taxom | | Carabodes Koch, 1914 | | 1 | Species | Taxom | | Castianeira Keyserling, 1847 | Ant-Mimic Sac Spiders | 2 | Species | Taxom | | Cheiracanthium C. L. Koch, 1864 | Longlegged sac spiders | 1 | Species | Taxom | | Chelifer Geoffroy, 1758 | | 1 | Species | Taxom | | Chthonius Koch, 1790 | | 1 | Species | Taxom | | Cicurina Menge, 1887 | | 1 | Species | Taxom | | Clubiona Latreille, 1866 | Leaf curling sac spiders | 1 | Species | Taxom | | Coras Simon, 1881 | Funnel Web Spiders | 1 | Species | Taxom | | Cyclosa Menge, 1842 | Three-lobed Spiders | 2 | Species | Taxom | Dendrolaelaps Halbert, 1915 | | 0 | Species | Taxom | | Dermacentor Koch, 1821 | Dog Ticks | 1 | Species | Taxom | | Dermanyssus Dugès, 1778 | | 1 | Species | Taxom | Digamasellus Berlese, 1905 | | 0 | Species | Taxom | | Dolomedes Latreille, 1844 | Dock spiders | 1 | Species | Taxom | | Drassyllus Chamberlin, 1922 | | 2 | Species | Taxom | | Dysdera Latreille, 1910 | | 2 | Species | Taxom | | Elaver O. P.-Cambridge, 1866 | | 1 | Species | Taxom | | Enoplognatha Pavesi, 1758 | | 2 | Species | Taxom | | Erebomaster Cope, 1924 | | 1 | Species | Taxom | | Eriophyes Siebold, 1857 | | 1 | Species | Taxom | | Eris C. L. Koch, 1845 | | 1 | Species | Taxom | Euschoengastia Ewing, 1938 | | 0 | Species | Taxom | | Eustala Simon, 1842 | | 1 | Species | Taxom | Eutrombicula Ewing, 1938 | | 0 | Species | Taxom | | Frontinella Cambridge, 1841 | | 1 | Species | Taxom | | Geolycosa Montgomery, 1842 | Burrowing wolf spiders | 1 | Species | Taxom | | Glenognatha Simon, 1894 | | 1 | Species | Taxom | | Habronattus F. O. P.-Cam..., 1895 | Paradise Spiders | 1 | Species | Taxom | | Haplodrassus Chamberlin, 1839 | | 1 | Species | Taxom | | Hentzia Marx, 1832 | | 2 | Species | Taxom | | Herpyllus Hentz, 1832 | | 1 | Species | Taxom | | Hibana Brescovit, 1847 | | 1 | Species | Taxom | | Hydranetes Kethley, 1971 | | 1 | Species | Taxom | | Hypselistes Simon, 1875 | | 1 | Species | Taxom | | Hypsosinga Ausserer, 1831 | | 1 | Species | Taxom | | Larinioides Caporiacco, 1758 | Furrow spiders | 3 | Species | Taxom | | Leiobunum C. L. Koch, 1821 | Daddy Long Leg Spiders | 2 | Species | Taxom | | Lepthyphantes Menge, 1865 | | 1 | Species | Taxom | | Maevia C. L. Koch, 1837 | | 1 | Species | Taxom | | Mangora O. P.-Cambridge, 1847 | | 1 | Species | Taxom | | Marpissa C. L. Koch, 1888 | | 3 | Species | Taxom | | Maso Simon, 1851 | | 1 | Species | Taxom | | Mecaphesa Simon, 1847 | | 1 | Species | Taxom | | Mermessus O. P.-Cambridge, 1892 | | 1 | Species | Taxom | | Metepeira F. O. P.-Cam..., 1847 | | 1 | Species | Taxom | | Micrathena Sundevall, 1842 | | 2 | Species | Taxom | | Microbisium Chamberlin, 1895 | | 1 | Species | Taxom | | Misumena Latreille, 1758 | Flower crab spiders | 1 | Species | Taxom | | Misumenoides F. O. P-Camb..., 1837 | | 1 | Species | Taxom | Myobia von Heyden, 1826 | | 0 | Species | Taxom | | Myrmarachne MacLeay, 1778 | Antmimicking spider | 1 | Species | Taxom | | Nemastoma C.L.Koch, 1851 | | 1 | Species | Taxom | | Neon Simon, 1888 | | 1 | Species | Taxom | | Neoscona Simon, 1847 | Spotted orbweavers | 3 | Species | Taxom | | Neospintharus Exline, 1850 | | 1 | Species | Taxom | | Neriene Blackwall, 1842 | | 2 | Species | Taxom | | Ophthalmodex Lukoschus & ..., 1984 | | 1 | Species | Taxom | | Ornithonyssus Sambon, 1913 | | 1 | Species | Taxom | | Oxyopes Latreille, 1845 | Lynx Spiders | 2 | Species | Taxom | | Pachygnatha Sundevall, 1884 | Thickjawed Orb Weavers | 1 | Species | Taxom | | Panonychus Yokoyama, 1836 | | 1 | Species | Taxom | | Paradoxiphis Berlese, 1956 | | 1 | Species | Taxom | | Parasteatoda Archer, 1841 | Comb-Clawed Spider | 1 | Species | Taxom | | Pardosa C. L. Koch, 1844 | Thin-legged Wolf Spider | 2 | Species | Taxom | | Pelegrina Franganillo, 1837 | White-Cheeked Jumping Spiders | 1 | Species | Taxom | Pergamasus Berlese, 1903 | | 0 | Species | Taxom | | Phalangium Linnaeus, 1761 | | 1 | Species | Taxom | | Phidippus C. L. Koch, 1905 | | 3 | Species | Taxom | | Philodromus Walckenaer, 1826 | Running Crab Spider | 3 | Species | Taxom | | Phlegra Simon, 1826 | | 1 | Species | Taxom | | Pholcus Walckenaer, 1775 | | 2 | Species | Taxom | | Phrurotimpus Chamberlin &..., 1911 | | 1 | Species | Taxom | | Pirata Sundevall, 1885 | Pirate wolf spiders | 1 | Species | Taxom | | Piratula Roewer, 1885 | | 1 | Species | Taxom | | Pisaurina Simon, 1837 | | 1 | Species | Taxom | | Polydiscia Methlagl, 2003 | | 1 | Species | Taxom | | Pseudeuophrys Dahl, 1826 | | 1 | Species | Taxom | | Salticus Latreille, 1757 | Zebra Spider | 1 | Species | Taxom | Sancassania Oudemans, 1916 | | 0 | Species | Taxom | | Satilatlas Keyserling, 1886 | | 1 | Species | Taxom | | Schizocosa Chamberlin, 1844 | | 2 | Species | Taxom | | Scotinella Banks, 1890 | | 1 | Species | Taxom | | Scotophaeus Simon, 1871 | | 1 | Species | Taxom | | Sisicottus Bishop & Crosby, 1999 | | 1 | Species | Taxom | | Siteroptes Amerling, 1970 | | 1 | Species | Taxom | | Socalchemmis Platnick & U..., 1919 | | 1 | Species | Taxom | | Sphodros Walckenaer, 1842 | | 1 | Species | Taxom | | Steatoda Sundevall, 1802 | False black widows | 3 | Species | Taxom | | Stemonyphantes Menge, 1758 | | 1 | Species | Taxom | Takayus Yoshida, 2001 | | 0 | Species | Taxom | | Talavera Peckham & Pe..., 1895 | | 1 | Species | Taxom | | Tegenaria Latreille, 1758 | House spiders | 1 | Species | Taxom | | Tennesseellum Petrunkevitch, 1882 | | 1 | Species | Taxom | | Tetragnatha Latreille, 1842 | Four-jawed spider | 2 | Species | Taxom | | Tetranychus Dufour, 1836 | | 1 | Species | Taxom | | Thanatus C. L. Koch, 1758 | | 1 | Species | Taxom | | Theridion Walckenaer, 1879 | Tangle-Web Spiders | 1 | Species | Taxom | | Thiodina Simon, 1846 | | 1 | Species | Taxom | | Tibellus Simon, 1802 | Slender Crab Spider | 2 | Species | Taxom | | Tigrosa Brady, 1837 | | 1 | Species | Taxom | | Tmarus Simon, 1837 | | 1 | Species | Taxom | | Trachelas L. Koch, 1847 | Running Spider | 1 | Species | Taxom | | Trochosa C. L. Koch, 1778 | | 1 | Species | Taxom | | Tutelina Simon, 1846 | | 1 | Species | Taxom | | Tyrophagus Oudemans, 1781 | | 1 | Species | Taxom | Unionicola Haldeman, 1842 | | 0 | Species | Taxom | | Urophonius Pocock, 1876 | | 1 | Species | Taxom | | Veigaia Oudemans, 1892 | | 1 | Species | Taxom | | Verrucosa McCook, 1842 | | 1 | Species | Taxom | | Walchia Ewing, 1964 | | 1 | Species | Taxom | | Walckenaeria Blackwall, 1853 | | 2 | Species | Taxom | | Xysticus Koch, 1880 | Ground Crab Spider | 2 | Species | Taxom | Zercon C.L.Koch, 1836 | | 0 | Species | Taxom | Zygoballus Peckham & Pe..., 1885 | | 0 | Species | Taxom |
Species list for Berks County
149 Species and 1 Subspecies | Agelenopsis pennsylvanica Carl Ludwig ..., 1843 | | | Agelenopsis potteri John Blackwall, 1846 | Potter'S Grass Spider | | Amaurobius ferox Walckenaer, 1830 | Black lace-weaver | | Apochinomma formica Eugène Simon, 1896 | | | Araneus diadematus Clerck, 1758 | Cross orbweaver | | Araneus guttulatus (Walckenaer, 1842) | ⇒ Araneus niveus Hentz, 1847 | | Araneus marmoreus Clerck, 1757 | Marbled Orb Weaver | | Araneus nordmanni Thorell, 1870 | Nordmann'S Orbweaver | | Araneus saevus L. Koch, 1872 | Fierce Orbweaver | | Araneus thaddeus (Hentz, 1847) | ⇒ Araneus meropes Keyserling, 1865 | | Araneus trifolium Hentz, 1847 | Shamrock orbweaver | | Araniella displicata Hentz, 1847 | Six-spotted orbweaver | | Archaeodictyna ammophila Menge, 1871 | | | Argiope trifasciata Forsskål, 1775 | Banded Argiope | | Asagena americana James Henry ..., 1882 | Two-Spotted Cobweb Spider | | Asca (Asca) garmani Hurlbutt, 1963 | | | Callobius bennetti Blackwall, 1846 | Bennett'S Laceweaver | | Carabodes scymnus Hull, 1914 | | | Castianeira descripta Nicholas Mar..., 1847 | Red Spotted Ant Mimic Spider | | Castianeira longipalpa Nicholas Mar..., 1847 | | | Cheiracanthium mildei L. Koch, 1864 | North Yellow Sac Spider | | Chelifer cancroides Linnaeus, 1758 | Book pseudoscorpion | | Chthonius (Ephippiochthonius) tetrachelatus Preyssler, 1790 | Dimple-clawed Chthonid | | Cicurina pallida Eugen von Ke..., 1887 | Littleleaf minerslettuce | | Clubiona abboti Ludwig Carl ..., 1866 | Redflower buckwheat | | Coras juvenilis Eugen von Ke..., 1881 | | | Cyclosa conica Pallas, 1772 | Conical Trashline Orbweaver | | Cyclosa turbinata Charles Atha..., 1842 | Orb weavers | | Dermacentor variabilis Say, 1821 | American dog tick | | Dermanyssus (Dermanyssus) gallinae De Geer, 1778 | Bird mite | | Dolomedes tenebrosus (Nicholas Mar..., 1844) | ⇒ Dolomedes vittatus Charles Atha..., 1837 | | Drassyllus depressus Emerton, 1890 | | | Drassyllus orgilus (Chamberlin, 1922) | ⇒ Drassyllus dromeus Chamberlin, 1922 | | Dysdera crocata (Koch, 1838) | ⇒ Dysdera maurusia Tord Tamerla..., 1873 | | Dysdera nomada Eugène Simon, 1910 | Stocky cerith | | Elaver excepta Ludwig Carl ..., 1866 | White Sac Spider | | Enoplognatha caricis Fickert, 1876 | | | Enoplognatha ovata (Clerck, 1758) | ⇒ Enoplognatha latimana Hippa & Oksala, 1982 | | Erebomaster acanthinus Crosby & Bishop, 1924 | Cobweb milkvetch | | Eriophyes tiliae Pagenstecher, 1857 | Bugle gall | | Eris militaris Nicholas Mar..., 1845 | Bronze jumper | | Eustala anastera (Walckenaer, 1842) | ⇒ Eustala conchlea Henry Christ..., 1888 | | Frontinella pyramitela (Walckenaer, 1841) | ⇒ Frontinella communis Hentz, 1850 | | Geolycosa fatifera (Nicholas Mar..., 1842) | ⇒ Geolycosa turricola Treat, 1880 | | Glenognatha foxi McCook, 1894 | Longjawed orb weavers | | Habronattus borealis Richard C. B..., 1895 | Boreal Paradise Spider | | Haplodrassus signifer (C. L. Koch, 1839) | ⇒ Haplodrassus pugnans Simon, 1880 | | Hentzia mitrata Nicholas Mar..., 1846 | Crowned Hentzia Jumping Spider | | Hentzia palmarum Nicholas Mar..., 1832 | Common Hentz Jumping Spider | | Herpyllus ecclesiasticus Hentz, 1832 | Eastern parson spider | | Hibana gracilis Hentz, 1847 | Garden ghost spider | | Hydranetes tropisternus Kethley, 1971 | | | Hypselistes florens Octavius Pic..., 1875 | Peatland Sheetweb Weaver | | Hypsosinga pygmaea Sundevall, 1831 | | | Larinioides cornutus Clerck, 1758 | Furrow orb spider | | Larinioides patagiatus Clerck, 1758 | Ornamental Orbweaver | | Larinioides sclopetarius (Clerck, 1758) | ⇒ Larinioides sericatus Clerck, 1757 | | Leiobunum ventricosum Wood, 1870 | | | Leiobunum vittatum Say, 1821 | Eastern Harvestman | | Lepthyphantes leprosus Ohlert, 1865 | Household Fine Sheetweaver | | Maevia inclemens Charles Atha..., 1837 | Dimorphic jumper | | Mangora gibberosa (Hentz, 1847) | ⇒ Mangora fascialata Franganillo, 1936 | | Marpissa formosa Richard C. B..., 1892 | Short-Bellied Slender Jumping Spider | | Marpissa lineata Carl Ludwig ..., 1846 | | | Marpissa pikei Peckham & Pe..., 1888 | Pike slender jumper | | Maso sundevalli (Johan Peter ..., 1851) | ⇒ Satilatlas marxi matanuskae Chamberlin, 1949 | | Mecaphesa asperata Nicholas Mar..., 1847 | Crab Spiders | | Mermessus maculatus Richard C. B..., 1892 | Sheet-web spiders | | Metepeira labyrinthea (Nicholas Mar..., 1847) | ⇒ Metepeira triangularis Pelegrin Fra..., 1930 | | Micrathena gracilis Charles Atha..., 1805 | Orb Weavers | | Micrathena sagittata Charles Atha..., 1842 | Arrowshaped micrathena | | Microbisium parvulum Banks, 1895 | | | Misumena vatia Clerck, 1758 | Crab Spider | | Misumenoides formosipes Charles Atha..., 1837 | White banded crab spider | | Myrmarachne formicaria (De Geer, 1778) | ⇒ Myrmaplata plataleoides O. Pickard-C..., 1869 | | Nemastoma (Nemastoma) leiobunum Wankel, 1851 | | | Neon nelli Peckham & Pe..., 1888 | | | Neoscona arabesca Walckenaer, 1842 | Arabesque orbweaver | | Neoscona crucifera Lucas, 1838 | Barn spider | | Neoscona domiciliorum Hentz, 1847 | Red-Femured Spotted Orbweaver | | Neospintharus trigonum Nicholas Mar..., 1850 | Horned Parasitic Cobweaver | | Neriene clathrata Sundevall, 1830 | | | Neriene radiata Walckenaer, 1842 | Filmy dome spider | | Ophthalmodex juniatae Veal, Giesen..., 1984 | | | Ornithonyssus bacoti Hirst, 1913 | Mite | | Oxyopes salticus Hentz, 1845 | Lynx spider | | Oxyopes scalaris Nicholas Mar..., 1845 | Western lynx spider | | Pachygnatha autumnalis Marx, 1884 | Big-Eyed Thick-Jawed Spider | | Panonychus (Panonychus) ulmi Koch, 1836 | ERM | | Paradoxiphis bolboceras Womersley, 1956 | | | Parasteatoda tepidariorum C. L. Koch, 1841 | American house false widow spider | | Pardosa distincta (John Blackwall, 1846) | ⇒ Pardosa hyperborea Thorell, 1872 | | Pardosa milvina Nicholas Mar..., 1844 | Shore spider | | Pelegrina proterva Charles Atha..., 1837 | Common White-Cheeked Jumping Spider | | Phalangium opilio Linnaeus, 1761 | Brown daddy-long-legs | | Phidippus audax (Nicholas Mar..., 1845) | ⇒ Salticus variegatus Hentz, 1845 | | Phidippus clarus Keyserling, 1885 | Brilliant Jumping Spider | | Phidippus pius Scheffer, 1905 | Jumping spiders | | Philodromus placidus Banks, 1892 | | | Philodromus praelustris Eugen von Ke..., 1880 | | | Philodromus rufus (Walckenaer, 1826) | ⇒ Philodromus albidus Wladislaus K..., 1911 | | Phlegra fasciata (Hahn, 1826) | ⇒ Phlegra hentzi Marx, 1890 | | Pholcus manueli Gertsch, 1937 | Cellar Spider | | Pholcus phalangioides (Fuesslin, 1775) | ⇒ Smeringopus pallidus Blackwall, 1858 | | Phrurotimpus borealis James Henry ..., 1911 | Greater Ant-Mimic Corinne Spider | | Pirata montanus Emerton, 1885 | Dark-Legged Pirate Wolf Spider | | Piratula minuta James Henry ..., 1885 | | | Pisaurina mira Charles Atha..., 1837 | American Nursery Web Spider | | Polydiscia deuterosminthurus Baquero, Mor..., 2003 | | | Pseudeuophrys erratica (Walckenaer, 1826) | ⇒ Pseudeuophrys lanigera Simon, 1871 | | Salticus scenicus (Clerck, 1757) | ⇒ Salticus cingulatus Panzer, 1797 | | Satilatlas marxi Eugen von Ke..., 1886 | Thin-ribbed mountainsnail | | Schizocosa ocreata (Nicholas Mar..., 1844) | ⇒ Schizocosa rovneri Uetz & Charl..., 1979 | | Schizocosa saltatrix Nicholas Mar..., 1844 | | | Scotinella pugnata James Henry ..., 1890 | | | Scotophaeus blackwalli (Thorell, 1871) | ⇒ Scotophaeus peninsularis Carl Friedri..., 1928 | | Sisicottus panopeus FrantiÅ¡ek M..., 1999 | | | Siteroptes kneeboni Wicht, 1970 | | | Socalchemmis dolichopus Ralph Vary C..., 1919 | | | Sphodros niger Hentz, 1842 | Black purse-web spider | | Steatoda borealis Nicholas Mar..., 1850 | Boreal Combfoot | | Steatoda grossa C. L. Koch, 1838 | Brown house spider | | Steatoda triangulosa Walckenaer, 1802 | Triangulate bud spider | | Stemonyphantes lineatus (Linnaeus, 1758) | ⇒ Stemonyphantes blauveltae Willis J. Ge..., 1951 | | Talavera minuta Richard C. B..., 1895 | | | Tegenaria domestica (Clerck, 1758) | ⇒ Tegenaria parietina Fourcroy, 1785 | | Tennesseellum formica James Henry ..., 1882 | | | Tetragnatha laboriosa Hentz, 1850 | Longjawed orb weavers | | Tetragnatha viridis Walckenaer, 1842 | Green Long-Jawed Spider | | Tetranychus (Tetranychus) urticae C. L. Koch, 1836 | Carmine spider mite | | Thanatus formicinus (Clerck, 1758) | ⇒ Thanatus miniaceus Simon, 1880 | | Theridion glaucescens Lawrence Becker, 1879 | | | Thiodina sylvana Nicholas Mar..., 1846 | Woodland Jumping Spider | | Tibellus maritimus Menge, 1875 | Goblin shark | | Tibellus oblongus (Walckenaer, 1802) | ⇒ Tibellus maritimus Menge, 1875 | | Tigrosa helluo Walckenaer, 1837 | Wetland Giant Wolf Spider | | Tmarus angulatus Charles Atha..., 1837 | Tuberculated Crab Spider | | Trachelas tranquillus Nicholas Mar..., 1847 | Broad faced sac spider | | Trochosa ruricola (De Geer, 1778) | ⇒ Trochosa hispanica Eugène Simon, 1870 | | Tutelina elegans Nicholas Mar..., 1846 | Thin-Spined Jumping Spider | | Tyrophagus (Tyrophagus) putrescentiae Schrank, 1781 | Cereal mite | | Urophonius brachycentrus brachycentrus Thorell, 1876 | | | Veigaia planicola Berlese, 1892 | Mite | | Verrucosa arenata Charles Atha..., 1842 | Arrowhead Orb Weaver | | Walchia (Wenia) isonychia Nadchatram &..., 1964 | | | Walckenaeria pallida James Henry ..., 1882 | | | Walckenaeria vigilax (John Blackwall, 1853) | ⇒ Walckenaeria spiralis James Henry ..., 1882 | | Xysticus ferox Nicholas Mar..., 1847 | Tan Crab Spider | | Xysticus funestus Eugen von Ke..., 1880 | |
Subnodes of Arachnida with occurrences in Berks County
 | | 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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