[Euophrys nigripalpis] Je cale

[Naunau]

Et n'oublie pas que les Talavera sont très proches des Euophrys...

Bon effectivement à cause de la petitesse de la bestiole, je me suis demandé si cela ne pouvait pas être une Talavera quand même. Mais ça colle pas car selon Logunov & Kronestedt 2003 ce genre ne posséderait pas d'apophyse tibiale sur le palpe... On reste donc bien dans les Euophrys selon moi.

[Tipic]

Cette petite taille n'est-elle pas la raison pour laquelle la comparaison est difficile avec E.rufibarbis ? Est ce que les palpes sont ceux d'une araignée mature ?

[Naunau]

Oui ce mâle est adulte. On peut observer toute les structures complexes impliqués directement dans la reproduction, tel que l'embolus, les conduits séminaux... L'apophyse rétrolatérale est aussi un bon indicateur.

[Tipic]

Merci Arnaud pour ces détails, j'en apprends tous les jours !! Et tes photos notamment sous bino sont hallucinantes

[vincesap]

Tu as progressé Arnaud ? (désolé, je ne te suis pas d'une très grande aide, le débat est d'un niveau trop élevé pour moi )

[Naunau]

J'ai ajouté quelques photos sous bino. Cela me rappelle quand même fort Talavera ! Mais comme dit précédement, le palpe ne colle pas avec ce genre !?!

[Pierre55]

Le palpe m'a pourtant l'air de bien coller avec celui de E. gambosa... mais c'est vrai qu'ils se ressemblent tous...
As-tu déjà lu l'article de J. Proszynski afin de bien comparer avec sa description ?

[Naunau]

Le palpe m'a pourtant l'air de bien coller avec celui de E. gambosa... mais c'est vrai qu'ils se ressemblent tous...
As-tu déjà lu l'article de J. Proszynski afin de bien comparer avec sa description ?

Oui, ça colle pas: deux rangées de soies blanches sur le clypeus et RTA absent (?). Sur Unibe on peut voir un RTA présent mais très court.
Mais je dois consulter tout cela plus en profondeur ...

[Naunau]

Photo de E. gambosa sur le Wiki des Spinnen-Forums ...

[Naunau]

J'ai eu un échange assez intéressant avec Johan van Keer et avec son accord je vous la partage (ci-dessous en anglais):
En conclusion, deux espèces pouvant coller ont retenu l'attention de Johan, à savoir E. rufibarbis et E. nigripalpis... Cette dernière colle parfaitement au niveau de l'habitus ("Clupeus dense orange-red, palps black"). Le seul hic est l'absence d'apophyse tibiale selon Simon (1937). Le seul moyen est de vérifié les types de Simon pour voir s'il n'aurait pas loupé l'apophyse ...

"Cher Arnaud,
Je vais te repondre en Anglais parce que mon Français n'est pas si bon pour expliquer tous correctement. Je vous demande pardon.
I have visited Proszynski's site and checked all the species which are mentioned in Simon (1937) but most of them were "species inquirenda". I have checked a lot of old literature and these are my "results", I don't know if they will be much help but nevertheless I' ve tried.
- Euophrys frontalis is very recognisable by the white stiff hairs dorsal on the cymbium, so delete.
- E. herbigrada: palps white and 2 yellow transverse stripes on clypeus, so delete.
- E. sulphurea: palps are white and tibial apophyse (TA) is shorter and thinner than in your specimen, so delete.
- E. gambosa: has a very short TA and clypeus has 2 transverse yellow-white stripes and also white palps, so delete.
- E. acripes: hairs on clypeus are white, so delete.
- E. alticola: TA is short, thick and sharply pointed (see Denis,1955 fig.2), so delete.
- E. baliola: Fully yellow palp and only known from Corsica, so delete.
- E.littoralis: Soyer (1959) gave no figures in his poorly description of this species but mentioned that it is very similar to Pseudeuophrys lanigera and was only captured in littoral environment, so delete.
- E. luteolineata: opisthosoma complete black with two longitudinal faint stripes, only known from Corisca (Simon,1937), so delete.
- E. nigritarsis: Prosoma unicolorous, hairs on clypeus yellow-orange, leg I with MT and Ta black, so delete.
- E. pexa: Leg I two coloured, clypeus white, so delete.
- E. rufimana: Clypeus entirely white, Leg I unicolorous brown without white Ta, so delete.
- E. sedula: leg I entirely two coloured, clypeus white, so delete.
- E. semiglabrata: embolus short and thick and TA broad at base, not as your specimen, so delete.
- E. terrestris: Cymbium at end rather straight but convex at base, TA straight, stouter and shorter than your specimen, so delete.
- E. rufibarbis: Clypeus orange-red, palps dark but not completely, leg I black with white Ta. The description in Metzner (1999) fits good with your specimen. The TA also fits.
- E. nigripalpis: Clupeus dense orange-red, palps black, but according to Simon (1937) the petrensis-group, where he placed E. nigripalpis, has no TA so I think you have to delete this species also.

I was focused on the two last species but I have my doubts about E. rufibarbis based on the colour of the prosoma. If one follows Simon's table only 2 species are eligible.
Denis and Simon state that colour of the opisthosoma is very variable, so for what it's worth I think E.rufibarbis has a good chance despite the prosoma. This is what I screened out of literature. But as you know a lot these species are in need of a thoroughly revision and the colour of hairs on the clypeus and palps are usefull for distinguishing species.
Hopefully you can do something with this "explanation".

Thank you Johan, for this thorough and detailed search !
Well, my first thought was E. rufibarbis, but I rejected it because of the prosoma coloration, but also because of the first legs pair. The unknown species here has the leg I completely black, excepted for the last segment. Same for the second leg, but the tibia is bicolor and the metatars and tars lighter. Please see here E. rufibarbis from the same place and check the differences. So, based on the habitus, I was quite convinced that it was not E. rufibarbis. But then I took a look on the palp and it was unclear which one it could be ...
The description of E. nigripalpis is quite interesting despite the possible lack of the RTA. I should say that without the high-quality photomontage of the palp, I would probably failed to note it: it almost has the same width than an adjacent setae! and furthermore the palp is very dark. I guess that the same occured for J. Prószyński when he revised E. gambosa without RTA (but it seems that for this species the RTA is very short).
So I keep in mind E. nigripalpis, maybe the type is in Paris and it would be possible to check it.
I must aslo keep in mind that I don't really know what is the variation of all these somatic characters ...

Thank you very much for your help and the times that you spent for these valuable searches !.

I fully agree with your point of view and I was more in favour to think it was E. nigripalpis, but who says that nigripalpis hasn't got a very fine tibial apophysis but was overlooked by Simon due to the very dark palp, for the moment it's the only species which has the best match to the descriptions given.
Bonne chance et bien à toi