Philodromidae: Thanatus C. L. Koch, 1837

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1

Femur/leg II longer than I and IV, metatarsi with two pro- and retrolateral spines, embolus tip long and filiform, receptacula without transverse seams

 

bungei-group

  2  

-

Femur/leg IV greater or equal to II and I, metatarsi with less than two pro- and retrolateral spines

  3  

2
(1)

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Prosoma width > 2.5 mm, tegular apophysis indistinct, glandular heads (arrow) broadly connected to receptacula

Thanatus bungei (Kulczyński, 1908)

-

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Prosoma width < 2.5 mm, tegular apophysis swollen membranous (arrow), glandular heads connected to receptacula by small stalks

Thanatus oblongiusculus (Lucas, 1846)

3
(1)

Legs elongated (femur IV/prosoma length > 1,7 in males, > 1,3 in females)

  4  

-

Femur IV/prosoma length < 1,5 in males, < 1,3 in females

  5  

4
(3)

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Retrolateral tibial apophysis with thorn-like tip, median septum of epigyne much longer than wide, receptacula with conspicuous contraction

Thanatus fabricii (Audouin, 1826)

-

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Retrolateral tibial apophysis long tapering and slightly undulating, median septum of epigyne as wide as long, receptacula bulbous

Thanatus lesserti (Roewer, 1951)

5
(3)

Tibia of male palp with 2 apophyses (ventral tibial apophysis, retrolateral tibial apophysis), lateral guide pockets of epigyne evenly curved, receptaculum a simple chamber with no distinct compartmentalization and few seams

  6  

-

Tibia of male palp with 1 apophysis (retrolateral tibial apophysis), lateral guide pockets of epigyne arched in posterior half, receptaculum with distinct compartments and seams

 

formicinus- and sabulosus-groups

  15  

6
(5)

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Embolus gradually tapering into fine straight tip, epigyne with anterior guide pockets

Thanatus pictus L. Koch, 1881

-

Embolus base swollen, embolus tip curved, epigyne without anterior guide pockets

 

striatus-group

  7  

7
(6)

Males

  8  

-

Females

  12  

8
(7)

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Retrolateral tibial apophysis with sharp tip pointing dorsad (lateral view)

Thanatus mikhailovi Logunov, 1996

female

-

Retrolateral tibial apophysis in lateral view with rounded tip

  9  

9
(8)

Retrolateral tibial apophysis in lateral view directed dorsad, embolus tip broadly twisted

  10  

-

Retrolateral tibial apophysis in lateral view directed distad/ventrad, embolus tip tightly twisted

  11  

10
(9)

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Embolus gradually narrowing with long tip

Thanatus atratus Simon, 1875

female

-

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Embolus base strongly swollen with apical bulge

Thanatus vulgaris Simon, 1870

female

11
(9)

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Prosoma width > 2 mm, prosoma uniformly dark brown

Thanatus firmetorum Muster & Thaler, 2003

female

-

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Prosoma width < 2 mm, prosoma with light median and lateral bands

Thanatus striatus C. L. Koch, 1845

female

12
(7)

Epigynal fold and lateral guide pockets in close contact

  13  

-

Epigynal fold and lateral guide pockets well separated

  14  

13
(12)

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Lateral guide pockets convex

Thanatus striatus C. L. Koch, 1845

male

-

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Lateral guide pockets concave

Thanatus mikhailovi Logunov, 1996

male

14
(12)

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Median septum wider than long

Thanatus firmetorum Muster & Thaler, 2003

male

-

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Median septum slightly longer than wide

Thanatus atratus Simon, 1875

male

-

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Median septum twice as long as wide

Thanatus vulgaris Simon, 1870

male

15
(5)

Males

  16  

-

Females

  23  

16
(15)

Tip of retrolateral tibial apophysis bifid

  17  

-

Retrolateral tibial apophysis with pointed tip

  19  

17
(16)

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Lobes of the tip of retrolateral tibial apophysis rounded

Thanatus arenarius L. Koch, 1872

female

-

Lobes of the tip of retrolateral tibial apophysis acuminate

  18  

18
(17)

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Cymbium length > 0.8 mm, tegular apophysis long

Thanatus imbecillus L. Koch, 1878

female

-

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Cymbium length < 0.8 mm, tegular apophysis short

Thanatus meronensis Levy, 1977

female

19
(16)

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Retrolateral tibial apophysis slim, much longer than wide

Thanatus sabulosus (Menge, 1875)

female

-

Retrolateral tibial apophysis robust, almost as wide as long

  20  

20
(19)

Retrolateral tibial apophysis keel-shaped, directed retrolaterad

  21  

-

Retrolateral tibial apophysis triangular, directed dorso-distad

  22  

21
(20)

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Tip of retrolateral tibial apophysis not curved, embolus originating at 9 o´clock position on tegulum

Thanatus coloradensis Keyserling, 1880

female

-

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Tip of retrolateral tibial apophysis slightly curved, embolus originating at 10:30 o´clock position on tegulum

Thanatus kitabensis Charitonov, 1946

female

22
(20)

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Tegular apophysis a bulge

Thanatus arcticus Thorell, 1872

female

-

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Tegular apophysis a chitinous blade

Thanatus formicinus (Clerck, 1757)

female

23
(15)

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Median septum round, converging anteriorly

Thanatus arenarius L. Koch, 1872

male

-

Not so

  24  

24
(23)

Lateral guide pockets forming semicircular arches

  25  

-

Lateral guide pockets S-shaped

  26  

25
(24)

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Epigyne wider than long

Thanatus meronensis Levy, 1977

male

-

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Epigyne as wide as long

Thanatus imbecillus L. Koch, 1878

male

26
(24)

Epigyne wider than long, receptacula with a couple of seams

  27  

-

Epigyne longer than wide, receptacula with multiple seams

  28  

27
(26)

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Prosoma width < 2 mm

Thanatus sabulosus (Menge, 1875)

male

-

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Prosoma width > 2 mm

Thanatus arcticus Thorell, 1872

male

28
(26)

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Median septum strongly elongated, lateral guide pockets weakly bulged

Thanatus coloradensis Keyserling, 1880

male

-

Median septum less elongated, lateral guide pockets strongly bulged

  29  

29
(28)

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Medial epigynal pocket present

Thanatus kitabensis Charitonov, 1946

male

-

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Without medial epigynal pocket

Thanatus formicinus (Clerck, 1757)

male

This key is a kind contribution by Christoph Muster.

Further taxa

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1. Thanatus dissimilis Denis, 1960

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2. Thanatus lineatipes Simon, 1870

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3. Thanatus mongolicus (Schenkel, 1936)

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4. Thanatus okayi Karol, 1966

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5. Thanatus rayi Simon, 1875

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6. Thanatus ubsunurensis Logunov, 1996

world7. Thanatus flavidus Simon, 1875
world8. Thanatus fuscipes concolor Denis, 1957
world9. Thanatus lanceolatus Simon, 1875
world10. Thanatus oblongiusculus atomarius (Simon, 1932)
world11. Thanatus vulgaris creticus Kulczyński, 1903