Linyphiidae: Diplocephalus Bertkau, 1883

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1
Males

  2  

- Females

  13  

2
(1)
Head with two processes

  3  

- Head with one process

  7  

3
(2)
Deep groove between anterior and posterior head process

  4  

- Groove not deep

  6  

4
(3)

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Tibial apophysis distally with three claws; prosoma as fig.

Diplocephalus permixtus (O. P.-Cambridge, 1871)

female

- Tibial apophysis without claws

  5  

5
(4)

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Tibial apophysis with a bent branch and several small processes

Diplocephalus connatus Bertkau, 1889

female

-

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Tibial apophysis only with one rectangularly bent branch; prosoma in lateral view as fig.

Diplocephalus foraminifer (O. P.-Cambridge, 1875)

female

6
(3)

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Posterior head process bullous and only rarely reduced; tibial apophysis with two slender, bent processes

Diplocephalus latifrons (O. P.-Cambridge, 1863)

female

-

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Both head processes ± equal in size; tibial apophysis with pointed, transverse process

Diplocephalus cristatus (Blackwall, 1833)

female

7
(2)
Head process strongly bullous; tibial apophysis with 2 processes at most

  8  

-

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Head process flatter; tibial apophysis with two lobe-shaped and one pointed process

Diplocephalus dentatus Tullgren, 1955

female

8
(7)
Tibial apophysis narrow, bent, bluntly ending

  9  

- Tibial apophysis broad, pointed or ending claw-like

  10  

9
(8)

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Tibial apophysis as fig.; paracymbium claw-shaped

Diplocephalus picinus (Blackwall, 1841)

female

-

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Tibial apophysis as fig.; Paracymbium not claw-shaped; prosoma with blunt conical cephalic lobe, provided with hairs on anterior side

Diplocephalus rostratus Schenkel, 1934

female

10
(8)

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Tibial apophysis with 2 short, pointed processes; prosoma as fig.

Diplocephalus helleri (L. Koch, 1869)

female

- Tibial apophysis with one pointed process

  11  

11
(10)

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Pointed process of tibial apophysis < width of tibial apophysis; prosoma as fig.

Diplocephalus protuberans (O. P.-Cambridge, 1875)

female

- Pointed process of tibial apophysis >> width of tibial apophysis

  12  

12
(11)

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Tibial apophysis as fig. anterior median eyes very small in males and females

Diplocephalus lusiscus (Simon, 1872)

female

-

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Tibial apophysis as fig.; cephalic lobe medially indented; female unknown

Diplocephalus caecus Denis, 1952

13
(1)
Inner margins of epigynal plates more strongly sclerotised

  14  

- Different

  17  

14
(13)

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Inner margins of lateral epigynal plates tail-like protruding toward anterior end

Diplocephalus rostratus Schenkel, 1934

male

- Different

  15  

15
(14)

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Inner margins of epigynal plate only in posterior area more strongly sclerotised, leaving out a broadly triangular part in posterior area

Diplocephalus connatus Bertkau, 1889

male

- Inner margins of epigynal plates in posterior area more strongly sclerotised

  16  

16
(15)

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Inner margins of epigynal plates ± parallel

Diplocephalus dentatus Tullgren, 1955

male

-

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Inner margins of epigynal plates diverging towards posterior end; anterior median eyes very small in males and females

Diplocephalus lusiscus (Simon, 1872)

male

17
(13)

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Epigynal plates directly adjoining to each other and leaving no gap

Diplocephalus permixtus (O. P.-Cambridge, 1871)

male

- Different

  18  

18
(17)

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Epigynal plates widely gaping, a brighter, regularly triangular area in between

Diplocephalus latifrons (O. P.-Cambridge, 1863)

male

- Different

  19  

19
(18)

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Epigynal plates gaping and its lobe-shaped process reaching beyond epigastric furrow

Diplocephalus picinus (Blackwall, 1841)

male

- Different

  20  

20
(19)

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Epigynal plates widely gaping, rounded posteriorly

Diplocephalus helleri (L. Koch, 1869)

male

- Different

  21  

21
(20)

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Inner margins of epigynal plates ± parallel, not touching each other; epigynal plates not distinctly marked off anteriorly, very variable

Diplocephalus cristatus (Blackwall, 1833)

male

-

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very similar to cristatus

Diplocephalus foraminifer (O. P.-Cambridge, 1875)

male

-

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Inner margins of epigynal plates not parallel; epigynal plates distinctly marked off anteriorly

Diplocephalus protuberans (O. P.-Cambridge, 1875)

male

Further taxa

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1. Diplocephalus alpinus (O. P.-Cambridge, 1873)

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2. Diplocephalus altimontanus Deltshev, 1984

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3. Diplocephalus arnoi Isaia, 2005

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4. Diplocephalus arvernus Denis, 1948

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5. Diplocephalus barbiger (Roewer, 1955)

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6. Diplocephalus bicephalus (Simon, 1884)

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7. Diplocephalus caucasicus Tanasevitch, 1987

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8. Diplocephalus connatus jacksoni O. P.-Cambridge, 1904

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9. Diplocephalus crassilobus (Simon, 1884)

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10. Diplocephalus culminicola Simon, 1884

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11. Diplocephalus foraminifer thyrsiger (Simon, 1884)

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12. Diplocephalus graecus (O. P.-Cambridge, 1873)

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13. Diplocephalus guidoi Frick & Isaia, 2012

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14. Diplocephalus hungaricus Kulczyński, 1915

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15. Diplocephalus komposchi Milasowszky, Bauder & Hepner, 2017

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16. Diplocephalus longicarpus (Simon, 1884)

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17. Diplocephalus machadoi Bosmans & Cardoso, 2010

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18. Diplocephalus marijae Bosmans, 2010

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19. Diplocephalus pavesii Pesarini, 1996

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20. Diplocephalus procer (Simon, 1884)

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21. Diplocephalus pseudocrassilobus Gnelitsa, 2006

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22. Diplocephalus pullinus Simon, 1918

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23. Diplocephalus rectilobus (Simon, 1884)

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24. Diplocephalus subrostratus (O. P.-Cambridge, 1873)

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25. Diplocephalus tiberinus (Caporiacco, 1936)

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26. Diplocephalus toscanaensis Wunderlich, 2011

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27. Diplocephalus transcaucasicus Tanasevitch, 1990

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28. Diplocephalus turcicus Brignoli, 1972