Theridiidae: Robertus O. P.-Cambridge, 1879

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Males

  2  

- Females

  11  

2
(1)

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Cymbium distally with 2 robust denticles

Robertus ungulatus Vogelsanger, 1944

female

- Cymbium without denticles

  3  

3
(2)

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Tibia of male pedipalp angled

Robertus lyrifer Holm, 1939

female

- Different

  4  

4
(3)

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Male pedipalp massive, spheroidal, with characteristic apophyses; conductor as fig.

Robertus arundineti (O. P.-Cambridge, 1871)

female

- Male pedipalp different

  5  

5
(4)
Bulbus with large double-tipped apophysis

  6  

- Bulbus different

  8  

6
(5)

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Tips of bulbal apophysis ± equally large and parallel

Robertus lividus (Blackwall, 1836)

female

- Different

  7  

7
(6)

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Tips of bulbal apophysis, conductor and embolus as fig.

Robertus truncorum (L. Koch, 1872)

female

-

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Tips of bulbal apophysis, conductor and embolus as fig.; opisthosoma yellow-brownish, mostly lighter than in lividus

Robertus mediterraneus Eskov, 1987

female

8
(5)
Bulbus laterally with large bipartite apophysis

  9  

- Different

  10  

9
(8)

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Bulbus laterally with apophysis; eyes relatively small

Robertus kuehnae Bauchhenss & Uhlenhaut, 1993

female

-

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Lateral bulbal apophysis as fig.

Robertus scoticus Jackson, 1914

female

10
(8)

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Lateral bulbal apophysis narrow and pointed

Robertus neglectus (O. P.-Cambridge, 1871)

female

-

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Lateral bulbal apophysis broad and with blunt ending

Robertus insignis O. P.-Cambridge, 1908

female

11
(1)

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Epigyne is a shallow, strongly sclerotised groove; entrance ducts very short

Robertus ungulatus Vogelsanger, 1944

male

- Epigyne different

  12  

12
(11)

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Epigyne as fig.

Robertus lyrifer Holm, 1939

male

- Epigyne different

  13  

13
(12)

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Epigynal groove pointed anteriorly; epigastric furrow posteriorly bulged; entrance ducts long and convoluted

Robertus arundineti (O. P.-Cambridge, 1871)

male

- Epigyne different

  14  

14
(13)
Epigynal groove shallow, strongly sclerotised

  15  

- Epigyne different

  17  

15
(14)

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Epigynal groove ± square or round, a little anterior to epigastric furrow

Robertus truncorum (L. Koch, 1872)

male

- Epigynal groove very large, reaching to epigastric furrow

  16  

16
(15)

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Epigyne and vulva as fig.

Robertus lividus (Blackwall, 1836)

male

-

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Epigyne and vulva as fig.; opisthosoma yellow-brownish, mostly lighter than in lividus

Robertus mediterraneus Eskov, 1987

male

17
(14)

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epigyne inconspicuous, on a bulge of epigastric furrow; entrance ducts approx. as long as diameter of receptacula seminis

Robertus kuehnae Bauchhenss & Uhlenhaut, 1993

male

- Epigyne different

  18  

18
(17)

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Epigynal groove small, directly at strongly sclerotised part of epigastric furrow; entrance ducts longer than diameter of receptacula seminis

Robertus scoticus Jackson, 1914

male

- Epigyne different

  19  

19
(18)

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Epigynal groove partly covered by broad chitinous fold; vulva as fig.

Robertus neglectus (O. P.-Cambridge, 1871)

male

-

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Epigyne as fig.

Robertus insignis O. P.-Cambridge, 1908

male

Further taxa

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1. Robertus alpinus Dresco, 1959

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2. Robertus cantabricus Fage, 1931

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3. Robertus cardesensis Dresco, 1959

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4. Robertus frivaldszkyi (Chyzer, 1894)

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5. Robertus golovatchi Eskov, 1987

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6. Robertus heydemanni Wiehle, 1965

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7. Robertus mazaurici (Simon, 1901)

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8. Robertus monticola Simon, 1914