Difference Between true spider and a t

[Darkmacheen]

I was just wondering what the scientific differences are between a true spider and a tarantula

 

[LeilaNami]

for one, T's have primitive fangs which can only move in a limited amount of directions. True spiders have fangs that can move 360 degrees

 

[Wolfy72]

I was just wondering what the scientific differences are between a true spider and a tarantula

Try Here for a start... http://www.thebts.co.uk/old_articles/natural.htm

 

[Mr.Scorpion]

True spiders fangs are positioned horizontally. Thats all I remember...

 

[Sarah.S]

The eyes are also different but its been a long time since I read up on that stuff so I cant remeber it all. I just rember they have 5 things and that true spiders have less things in comman to primitive spider anccestors.

 

[PhilR]

Mygalomorphs (including tarantulas) have paraxial chelicera/fang movement (basically up and down,), true spiders have diaxial (side to side like pincers) fang/chelicera movement.

Mygalomorphs (tarantulas, trapdoors etc..) have four booklungs, true spiders (araneomorphs) have two booklungs and spiracles (air openings).

 

[diadematus]

Mygalomorphs (including tarantulas) have paraxial chelicera/fang movement (basically up and down,), true spiders have diaxial (side to side like pincers) fang/chelicera movement.

Mygalomorphs (tarantulas, trapdoors etc..) have four booklungs, true spiders (araneomorphs) have two booklungs and spiracles (air openings).

Where does the "true spiders" label for the Araneomorphae originate? I also see it mentioned (in quotation marks) in Foelix's Biology of Spiders.

-Kevin

 

[PhilR]

Where does the "true spiders" label for the Araneomorphae originate? I also see it mentioned (in quotation marks) in Foelix's Biology of Spiders.

-Kevin

I don't know the origin of the phrase, but it's been in use to distinguish between araneomorphae and more "primitive" suborders of Araneae for a long time