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1 |
Males | |||||||||||||
- | Females | |||||||||||||
2 (1) |
Patellar apophysis missing; Prosoma as fig. female unknown Erigone jaegeri Baehr, 1984 |
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- | Patellar apophysis present | |||||||||||||
3 (2) |
Patellar apophysis projecting; colour light orange to yellow-brown; sternum and opisthosoma slightly blackish; eye field contrastingly black Erigone autumnalis Emerton, 1882 |
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- | Patellar apophysis and colour different | |||||||||||||
4 (3) |
Patellar apophysis rectangularly projecting | |||||||||||||
- | Patellar apophysis projecting less than 90° from patella and directed away from cymbium | |||||||||||||
5 (4) |
Tibia with strongly projecting apophysis Erigone svenssoni Holm, 1975 |
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- | Different | |||||||||||||
6 (5) |
Tibial apophysis with a distinctly bilobed part next to pointed part Erigone dentipalpis (Wider, 1834) |
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- | Different | |||||||||||||
7 (6) |
Dorsal process of tibial apophysis pointed-triangular Erigone aletris Crosby & Bishop, 1928 |
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- | Tibial apophysis with a short, stout tooth Erigone capra Simon, 1884 |
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8 (4) |
Patellar apophysis strikingly long, approximately rectangularly projecting, tip distinctly bent backwards Erigone psychrophila Thorell, 1871 |
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- | Different | |||||||||||||
9 (8) |
Tibial apophysis with a median process | |||||||||||||
- | Tibial apophysis without a median process | |||||||||||||
10 (9) |
Median process of tibial apophysis rounded | |||||||||||||
- | Median process of tibial apophysis with one or two pointed teeth | |||||||||||||
11 (10) |
Tibial apophysis with a medially rounded, flat process Erigone atra Blackwall, 1833 |
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- | Tibial apophysis with a stronger protruding, rounded process as fig.; sides of patellar apophysis ± parallel; terminal appendix as fig. Erigone remota L. Koch, 1869 |
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12 (10) |
Median process of tibial apophysis with two crossing denticles Erigone longipalpis (Sundevall, 1830) |
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- | Median process of tibial apophysis with two denticles arranged in a row (Additional remark: Holm (1956) distinguishes the north European subspecies maritima from Canadian and Sibiric populations) Erigone arctica arctica (White, 1852) |
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13 (9) |
Dorsal process of tibial apophysis rounded Erigone promiscua (O. Pickard-Cambridge, 1873) |
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- | Pedipalp as fig. Erigone tirolensis L. Koch, 1872 |
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14 (1) |
Epigynal plate roundish posteriorly, with median groove Erigone remota L. Koch, 1869 |
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- | Different | |||||||||||||
15 (14) |
Posterior epigynal margin distinctly U-like indented medially or with a shallow groove | |||||||||||||
- | Posterior epigynal margin only slightly bent medially | |||||||||||||
16 (15) |
Posterior epigynal margin deeply U-like indented Erigone longipalpis (Sundevall, 1830) |
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- | Posterior epigynal margin with a shallow groove | |||||||||||||
17 (16) |
Lateral protruding area of epigynal plate semicircularly sclerotised Erigone capra Simon, 1884 |
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- | Different | |||||||||||||
18 (17) |
Epigyne lifted and in posterior view with ± triangular median part, distinctly bordered by sclerotised area anteriorly Erigone psychrophila Thorell, 1871 |
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- | Epigyne lifted and in posterior view not bordered by sclerotised area anteriorly Erigone tirolensis L. Koch, 1872 |
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19 (15) |
Epigynal plate laterally with two circular depressions Erigone arctica arctica (White, 1852) |
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- | Epigynal plate different, more or less unstructured | |||||||||||||
20 (19) |
Epigynal plate distinctly bordered laterally | |||||||||||||
- | Epigynal plate laterally different, semicircular | |||||||||||||
21 (20) |
Epigynal plate almost twice as wide as long Erigone atra Blackwall, 1833 |
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- | Epigynal plate ± as long as wide Erigone dentipalpis (Wider, 1834) |
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22 (20) |
Posterior epigynal margin with two uniformly bent protrusions | |||||||||||||
- | Different | |||||||||||||
23 (22) |
Receptacula seminis distinctly shining through epigyne; epigyne lifted and in posterior view ± quadrangular Erigone promiscua (O. Pickard-Cambridge, 1873) |
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- | Receptacula seminis not visible through epigyne; epigyne lifted and in posterior view ± triangular Erigone aletris Crosby & Bishop, 1928 |
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24 (22) |
Epigyne only in posterior area with transverse folds Erigone autumnalis Emerton, 1882 |
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- | Epigyne in whole length with transverse folds Erigone svenssoni Holm, 1975 |
1. Erigone arctica palaearctica Brændegaard, 1934 |
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2. Erigone arcticola Chamberlin & Ivie, 1947 |
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3. Erigone cristatopalpus Simon, 1884 |
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4. Erigone dentosa O. Pickard-Cambridge, 1894 |
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5. Erigone dumitrescuae Georgescu, 1969 |
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6. Erigone hypoarctica Eskov, 1989 |
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7. Erigone jugorum Simon, 1884 |
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8. Erigone longipalpis pirini Deltshev, 1983 |
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9. Erigone maritima Kulczyński, 1902 |
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10. Erigone nigrimana Thorell, 1875 |
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11. Erigone remota dentigera Simon, 1926 |
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12. Erigone tenuimana Simon, 1884 |
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13. Erigone welchi Jackson, 1911 |
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14. Erigone whymperi O. Pickard-Cambridge, 1877 |
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