Author Topic: Philodromus? => Philodromus aureolus  (Read 924 times)

Offline Geddy 1.

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Philodromus? => Philodromus aureolus
« on: April 12, 2010, 07:38:46 PM »
Hei, jeg fant denne edderkoppen tassende rundt på balkongen i dag tidlig. Det må vel være en Philodromus sp.? Ca. 4mm lang.

« Last Edit: January 11, 2020, 12:12:54 AM by H. Løvbrekke »
mvh
Geir Drange

Offline Geddy 1.

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Re: Philodromus?
« Reply #1 on: April 12, 2010, 07:39:04 PM »
Epigyn:
mvh
Geir Drange

Offline Glenn H. Morka

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Re: Philodromus?
« Reply #2 on: April 12, 2010, 11:10:14 PM »
Hei Geir!

Ja dette er helt riktig en Philodromus sp.
Den tilhører antagelig "Cespitum"-gruppen, hvor vi har P, cespitum, P. collinus, og P. aureolus. Disse er praktisk talt like av utseende siden de overlapper hverandre i ytre habitus. Du har tatt et så knakende godt bilde av epigynområdet, at man kan se individet er en subadult/juvenil, og dermed ikke kan bestemmes enda til eksakt art. Tar du slike lignende gode bilder av adulte utover sommeren, vil vi kunne se det med en gang hvilken art det er.

Det kan også være en P. dispar, og de kan iddes som juvenile også, men da må man få et bilde tatt fra siden, slik at man ser det skarpe skillet mellom den mørke ryggfargen, og den lyse buksiden. Dette skillet er veldig tydelig på P. dispar, kontra de andre lignende artene.

Mvh Glenn.
"Sykemeldt"



Offline Simeon Indzhov

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Re: Philodromus? => Philodromus sp.
« Reply #3 on: January 09, 2020, 01:34:31 AM »
A subadult female, but habitus says it was likely going to become aureolus s.str.
Simeon

Offline H. Løvbrekke

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Re: Philodromus? => Philodromus sp.
« Reply #4 on: January 09, 2020, 09:41:31 PM »
Hi
I've studied these species to try to find differences, but I can't find any differences.

Nice if you could explain how to tell the difference between the appearance of the three species: Philodromus aureolus, Philodromus cespitum and Philodromus Collinus

Regards Harald

Offline Simeon Indzhov

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Re: Philodromus? => Philodromus sp.
« Reply #5 on: January 10, 2020, 10:29:32 AM »
Females and older juveniles:
Philodromus aureolus: colour, brown or golden, in juveniles sometimes darker silverish or lead-like, overall uniform, sides of abdomen sometimes darker. No reddish nuance present. Cardiac mark, usually indistinct or when present, not darker than dorsum. White spots laterally are often present. Legs, uniformly coloured (Femora I and II non translucent), annulations, only weakly marked.

Philodromus cespitum: This is the most variable species in terms of colour, but is usually light, with the darkest specimens only weakly approaching aureolus. Its colour ranges from almost white through silver to orange-golden, with weak reddish nuance. Cardiac mark, again indistinct, though often surrounded with a white patch of hairs. Legs, light, with femora I-II whitish or greenish/bluish, from patella on brownish (due to fused annulations)

Philodromus collinus: Overall colour, reddish-copper to brown. Cardiac mark, not darker than rest of abdomen, in typical specimens often surrounded with white hairs forming chevrons. Legs, same colour as abdomen, with femora I-II somewhat lighter. Occasionally, a medial ring is present on these femora

Philodromus praedatus: Overall colour, golden to light brown (never as dark or intensive as in aureolus, more in the yellow tones). Cardiac mark, large and often darkened. Cephalothorax, often with a darker longitudinal median line. Legs, with distinct, clear annulations, with femora I-II usually the same colour as body or only slightly paler, often not translucent.
« Last Edit: January 11, 2020, 12:14:05 AM by Simeon Indzhov »

Offline H. Løvbrekke

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Re: Philodromus? => Philodromus sp.
« Reply #6 on: January 10, 2020, 11:56:40 PM »
Thanks for the explanation, I will include your information further.

Greeting
Harald

Offline Simeon Indzhov

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Re: Philodromus? => Philodromus sp.
« Reply #7 on: January 11, 2020, 12:08:53 AM »
Males:
Philodromus aureolus: colour, strongly iridescent on both abdomen and cephalothorax, in green and purple. Sometimes has its lateral white spots on abdomen retained. Cephalothorax, sometimes but not always with a longitudinal dark line. Legs, robust, yellowish brown, almost without annulations. Palps, characteristically broad.

Philodromus cespitum: colour, silverish on abdomen and reddish on both cephalothorax and legs. This habitus is very characteristic. Legs, sometimes retaining the more or less indistinct annulations from earlier stages

Philodromus collinus: strongly iridescent like Philodromus aureolus, but a bit darker, usually smaller and more elegant. Legs, like in aureolus but thinner and somewhat darker. Palps are also narrower.

Philodromus praedatus: colour, brownish, only weakly iridescent on both segments. The juvenile markings like the cardiac mark and the leg annulations are retained. Cephalothorax, often with a dark longitudinal line. Legs, with distinct annulations.

Offline Simeon Indzhov

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Re: Philodromus? => Philodromus aureolus
« Reply #8 on: January 11, 2020, 12:17:24 AM »
I would like to add that Philodromus cespitum and Philodromus collinus sometimes have aberrant specimens with brown abdomen sides and an uniformly yellow-bronze dorsum (like this), and then, in collinus, the legs are especially dark brown. The legs in this cespitum morph are usually normal, maybe only slightly darker distally