Linyphiidae: Silometopus

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1
Males

  2  

- Females

  9  

2
(1)
Cephalic lobe distinctly developed (height at least 1/2 of length)

  3  

- Cephalic lobe weakly developed or missing

  7  

3
(2)

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Tibial apophysis with a thin, S-shaped process

Silometopus elegans (O. P.-Cambridge, 1873)

female

speciesimage
male Pedipalp
(Wiehle 1960a)
speciesimage
male Pedipalp
(Wiehle 1960a)
speciesimage
male Pedipalp
(Roberts 1987)
speciesimage
male Palpal tibia
(Roberts 1987)
speciesimage
male Tibial apophysis
(Wiehle 1960a)
speciesimage
male Tibial apophysis
(Locket & Millidge 1953)
speciesimage
male Prosoma, lateral view
(Wiehle 1960a)
speciesimage
male Prosoma, lateral view
(Roberts 1987)
speciesimage
male Prosoma, lateral view
(Locket & Millidge 1953)
- Different

  4  

4
(3)
Tibial apophysis short, robust, bent

  5  

- Tibial apophysis short and straight or with broad base, long and bent

  6  

5
(4)

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Tibial apophysis as fig.

Silometopus rosemariae Wunderlich, 1969

female

speciesimage
male Pedipalp, retrolateral view
(Thaler 1971)
speciesimage
male Pedipalp, prolateral view
(Thaler 1971)
speciesimage
male Tibial apophysis, dorsal view
(Thaler 1971)
speciesimage
male Prosoma, lateral view
(Thaler 1971)
speciesimage
male Prosoma, dorsal view
(Thaler 1971)
-

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Tibial apophysis as fig.

Silometopus bonessi Casemir, 1970

female

speciesimage
male Pedipalp, ventral view
(Pozzi & Hänggi 1998)
speciesimage
male Tibial apophysis
(Heimer & Nentwig 1991)
speciesimage
male Prosoma, lateral view
(Heimer & Nentwig 1991)
6
(4)

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Tibial apophysis short and straight; opisthosoma flat, longish oval, densely provided with impressed dots

Silometopus curtus (Simon, 1881)

female

speciesimage
male Palpal tibia, dorsoretrolateral view
(Denis 1963b)
speciesimage
male Palpal tibia, dorsal view
(Denis 1963b)
speciesimage
male Palpal tibia, dorsal view
(Simon 1926)
-

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Tibial apophysis long and bent; opisthosoma with four dorsal sigilla, outer margin, lung stigma and spinnerets sclerotised, additionally a dorsal scutum

Silometopus braunianus Thaler, 1978

female

speciesimage
male Pedipalp
(Thaler 1972b)
speciesimage
male Pedipalp
(Thaler 1978b)
speciesimage
male Tibial apophysis
(Thaler 1978b)
speciesimage
male Prosoma, lateral view
(Thaler 1978b)
speciesimage
male Prosoma, dorsal view
(Thaler 1978b)
7
(2)

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Prosoma without cephalic lobe; tibial apophysis with a short, straight process

Silometopus ambiguus (O. P.-Cambridge, 1906)

female

speciesimage
male Pedipalp
(Roberts 1987)
speciesimage
male Palpal tibia
(Roberts 1987)
speciesimage
male Tibial apophysis
(Heimer & Nentwig 1991)
speciesimage
male Tibial apophysis
(Locket & Millidge 1953)
speciesimage
male Prosoma, lateral view
(Heimer & Nentwig 1991)
speciesimage
male Prosoma, lateral view
(Roberts 1987)
- Prosoma with slightly elevated eye region; tibial apophysis with bent process

  8  

8
(7)

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Prosoma uniformly descending towards posterior end; pedipalp with very robust embolus; tibia with large, bent apophysis

Silometopus incurvatus (O. P.-Cambridge, 1873)

female

speciesimage
male Pedipalp
(Heimer & Nentwig 1991)
speciesimage
male Pedipalp
(Roberts 1987)
speciesimage
male Pedipalp
(Locket & Millidge 1953)
speciesimage
male Palpal tibia
(Roberts 1987)
speciesimage
male Tibial apophysis
(Heimer & Nentwig 1991)
speciesimage
male Tibial apophysis
(Locket & Millidge 1953)
speciesimage
male Prosoma, lateral view
(Heimer & Nentwig 1991)
speciesimage
male Prosoma, lateral view
(Roberts 1987)
-

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Prosoma straight in anterior region, step-like descending in median region; pedipalp with thin, long embolus; tibial apophysis with one bent and one short, straight process

Silometopus reussi (Thorell, 1871)

female

speciesimage
male Pedipalp
(Wiehle 1960a)
speciesimage
male Pedipalp
(Wiehle 1960a)
speciesimage
male Pedipalp
(Roberts 1987)
speciesimage
male Palpal tibia
(Roberts 1987)
speciesimage
male Tibial apophysis
(Wiehle 1960a)
speciesimage
male Tibial apophysis
(Locket & Millidge 1953)
speciesimage
male Prosoma, lateral view
(Wiehle 1960a)
speciesimage
male Prosoma, lateral view
(Roberts 1987)
speciesimage
male Prosoma, lateral view
(Locket & Millidge 1953)
9
(1)
Epigyne with median plate and oval groove, posteriorly situated

  10  

- Different

  11  

10
(9)

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Groove broad, posterior margin of groove hardly indented

Silometopus reussi (Thorell, 1871)

male

speciesimage
female Epigyne
(Wiehle 1960a)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Locket & Millidge 1953)
speciesimage
female Vulva
(Wiehle 1960a)
-

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Groove narrow, posterior margin stronger indented

Silometopus rosemariae Wunderlich, 1969

male

speciesimage
female Vulva
(Thaler 1971)
11
(9)
Lateral epigynal plates leaving out a ± triangular median part

  12  

-

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Different, posterior epigynal margin almost semicircular

Silometopus bonessi Casemir, 1970

male

speciesimage
female Epigyne
(Pozzi & Hänggi 1998)
speciesimage
female Vulva
(Pozzi & Hänggi 1998)
12
(11)
Median triangular epigynal part reaching ± 1/2 of epigyne length

  13  

- Median triangular epigynal part reaching ± 1/3 of epigyne length

  15  

13
(12)

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Posterior epigynal margin rounded

Silometopus incurvatus (O. P.-Cambridge, 1873)

male

speciesimage
female Epigyne
(Heimer & Nentwig 1991)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Vulva
(Heimer & Nentwig 1991)
speciesimage
female Vulva
(Locket et al. 1974)
- Posterior epigynal margin straight

  14  

14
(13)

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Epigyne and vulva as figs.; opisthosoma leather-like

Silometopus ambiguus (O. P.-Cambridge, 1906)

male

speciesimage
female Epigyne
(Heimer & Nentwig 1991)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Locket & Millidge 1953)
speciesimage
female Vulva
(Heimer & Nentwig 1991)
speciesimage
female Vulva
(Locket et al. 1974)
-

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Epigyne as fig.; opisthosoma flat, longish oval, densely provided with impressed dots

Silometopus curtus (Simon, 1881)

male

15
(12)

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Median triangular epigynal part reaching approximately 1/3 of epigyne length; opisthosoma grey-brown

Silometopus elegans (O. P.-Cambridge, 1873)

male

speciesimage
female Epigyne
(Wiehle 1960a)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Roberts 1987)
speciesimage
female Epigyne
(Locket & Millidge 1953)
speciesimage
female Vulva
(Wiehle 1960a)
speciesimage
female Vulva
(Locket et al. 1974)
-

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Epigyne/vulva as fig.; opisthosoma with four dorsal sigilla, outer margin, lung stigma and spinnerets sclerotised, additionally a dorsal scutum

Silometopus braunianus Thaler, 1978

male

speciesimage
female Vulva
(Thaler 1978b)
Further taxa

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1. Silometopus acutus Holm, 1977

speciesimage
male Pedipalp, retrolateral view
(Holm 1977)
speciesimage
male Palpal tibia, dorsal view
(Holm 1977)
speciesimage
male Prosoma, lateral view
(Holm 1977)
speciesimage
male Prosoma, dorsal view
(Holm 1977)
speciesimage
female Epigyne, ventral view
(Holm 1977)
speciesimage
female Epigyne, posterior view
(Holm 1977)
speciesimage
female Vulva, ventral view
(Holm 1977)

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2. Silometopus nitidithorax (Simon, 1915)

speciesimage
male Pedipalp, retrolateral view
(Bosmans et al. 2009)
speciesimage
male Embolic division, prolateral view
(Bosmans et al. 2009)
speciesimage
male Palpal tibia
(Simon 1926)
speciesimage
male Palpal tibia, dorsal view
(Bosmans et al. 2009)
speciesimage
male Prosoma, dorsal view
(Bosmans et al. 2009)
speciesimage
male Prosoma, lateral view
(Bosmans et al. 2009)
speciesimage
female Epigyne, ventral view
(Bosmans et al. 2009)
speciesimage
female Vulva, ventral view
(Bosmans et al. 2009)

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3. Silometopus tenuispinus Denis, 1950

speciesimage
female Epigyne, ventral view
(Denis 1950c)
speciesimage
female Prosoma, lateral view
(Denis 1950c)

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4. Silometopus uralensis Tanasevitch, 1985

speciesimage
male Pedipalp, retrolateral view
(Tanasevitch 1985)
speciesimage
male Embolic division
(Tanasevitch 1985)
speciesimage
male Palpal tibia
(Tanasevitch 1985)
speciesimage
female Epigyne, dorsal view
(Tanasevitch 1985)
speciesimage
female Vulva
(Tanasevitch 1985)