Linyphiidae: Metopobactrus

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1
Males

  2  

- Females (in most cases females can only be reliably identified considering males caught in the same place)

  6  

2
(1)

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Head region only conically elevated; tibial apophysis with row of bristles; male prosoma as fig.

Metopobactrus prominulus (O. P.-Cambridge, 1873)

female

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male Pedipalp
(Wiehle 1960a)
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male Pedipalp
(Roberts 1987)
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male Tibial apophysis, retrolateral view
(Thaler 1976a)
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male Tibial apophysis
(Locket & Millidge 1953)
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male Prosoma, lateral view
(Thaler 1976a)
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male Prosoma, lateral view
(Locket & Millidge 1953)
- Head region with cephalic lobe or frontal processes

  3  

3
(2)

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Eye field in males with slantingly projecting frontal process; tibia of male pedipalp with bluntly rounded apophysis

Metopobactrus nodicornis Schenkel, 1927

female

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male Pedipalp
(Thaler 1976b)
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male Palpal tibia
(Thaler 1976b)
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male Prosoma, lateral view
(Thaler 1976b)
- Different

  4  

4
(3)

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Distal margin of pedipalp tibia with a long not very protruding tooth-lamella; prosoma as fig.

Metopobactrus ascitus (Kulczyński, 1894)

female

speciesimage
male Pedipalp
(Miller 1944)
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male Pedipalp
(Miller 1971)
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male Tibial apophysis
(Miller 1944)
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male Prosoma, lateral view
(Miller 1971)
- Distal margin with protruding tooth-lamella

  5  

5
(4)

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Tibial apophysis of male pedipalp plump

Metopobactrus prominulus (O. P.-Cambridge, 1873)

female

male

-

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Tibial apophysis of male pedipalp slender, with hook-shaped apophysis; prosoma with variable dorsal humps

Metopobactrus nadigi Thaler, 1976

female

speciesimage
male Pedipalp
(Thaler 1976b)
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male Tibial apophysis, dorsal view
(Thaler 1976b)
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male Tibial apophysis, retrolateral view
(Thaler 1976b)
6
(1)
Epigyne - vulva: entrance ducts initially running parallel

  7  

- Entrance ducts diverging

  8  

7
(6)

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Vulva as fig.

Metopobactrus ascitus (Kulczyński, 1894)

male

speciesimage
female Vulva
(Miller 1944)
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Epigyne and vulva as fig.

Metopobactrus nadigi Thaler, 1976

male

speciesimage
female Epigyne
(Hänggi 1989)
speciesimage
female Vulva
(Hänggi 1989)
8
(6)

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Eye field uniformly convex; epigyne and vulva as fig.; females can only be reliably identified considering males caught in the same place

Metopobactrus prominulus (O. P.-Cambridge, 1873)

female

male

speciesimage
female Epigyne
(Wiehle 1960a)
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female Epigyne
(Roberts 1987)
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female Epigyne
(Roberts 1987)
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female Epigyne
(Roberts 1987)
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female Epigyne/vulva
(Thaler 1976a)
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female Prosoma, lateral view
(Thaler 1976a)
-

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Distinguishable from prominulus only by males caught in the same place

Metopobactrus prominulus (O. P.-Cambridge, 1873)

male

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Eye field bulged at an obtuse angle; epigyne very similar to prominulus

Metopobactrus nodicornis Schenkel, 1927

male

speciesimage
female Epigyne/vulva
(Thaler 1976b)
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female Prosoma, lateral view
(Thaler 1976b)
Further taxa

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1. Metopobactrus deserticola Loksa, 1981

speciesimage
male Pedipalp, retrolateral view
(Szita et al. 1998)
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male Pedipalp
(Loksa 1981b)
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male Tip of embolus, dorsal view
(Loksa 1981b)
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male Palpal tibia, dorsal view
(Loksa 1981b)
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male Prosoma, lateral view
(Szita et al. 1998)
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male Habitus
(Szita et al. 1998)
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female Epigyne
(Szita et al. 1998)
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female Epigyne/vulva, ventral view
(Loksa 1981b)
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female Vulva, ventral view
(Szita et al. 1998)
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female Habitus
(Szita et al. 1998)

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2. Metopobactrus falcifrons Simon, 1884

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male Palpal tibia, dorsal view
(Simon 1884a)
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male Prosoma, lateral view
(Simon 1884a)
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female Epigyne/vulva
(Thaler 1976a)

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3. Metopobactrus orbelicus Deltshev, 1985

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male Pedipalp, retrolateral view
(Deltshev 1985a)
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male Pedipalp, prolateral view
(Deltshev 1985a)
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male Palpal tibia, dorsal view
(Deltshev 1985a)
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male Cephalic area
(Deltshev 1985a)
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male Cephalic area
(Deltshev 1985a)
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female Epigyne
(Deltshev 1985a)
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female Vulva, dorsal view
(Deltshev 1985a)
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female Vulva, ventral view
(Deltshev 1985a)

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4. Metopobactrus verticalis (Simon, 1881)

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male Pedipalp, retrolateral view
(IJland & van Helsdingen 2014)
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male Palpal tibia
(Simon 1926)
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male Palpal tibia, dorsal view
(IJland & van Helsdingen 2014)
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male Prosoma, lateral view
(Simon 1926)
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female Epigyne
(Simon 1926)