Chthonic Wildlife Ramblings

Reflections of a heterodox conservationist

NZ Tunnelwebs

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These large lurking spiders are common in the NZ bush. Their nocturnal habits though mean they are rarely seen by people. On occasion they do wander into people's houses. We had one crawl across the kitchen floor earlier on afternoon. Fortunately in our house we keep a cool head around large spiders. Actually we tend to be enthusiastic greeters to such arachnids.

Nonetheless, the best time to see these spiders is at night. It is extremely rare to see them out of their tunnels. Nonetheless, I managed it with this large beauty. This is the NZ Hexathelid Hexatheles hochstetteri - one of the very first species from NZ to be described.

This Mygalomorph spider is unusual for having 6 spinnerets rather than 4. They are some of New Zealand's largest (by weight) spiders.

#1 Wanderer


#2 Closeup- the small eyes are clustered at the front edge of the carapace


#3 Adapted to kill- the spines on the front legs help trap the prey long enough for the fangs to strike


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Comments

Adele BrandSittingFox Monday, December 10, 2012 10:19:13 PM

That is quite a spider! What is their legspan?

Mimis Mum (MM)mimi_s_mum Tuesday, December 11, 2012 2:28:15 AM

Yap! Looks very familiar. I have heaps of them in and around house. For those that came in, I've found a "catch and release" approach using a glass and piece of stiff paper works very well. bigsmile

Chthoniidchthoniid Tuesday, December 11, 2012 2:49:36 AM

Originally posted by SittingFox:

That is quite a spider! What is their legspan?



The syntype (holotype has been lost) gives individual leg lengths of 20-25mm.

Chthoniidchthoniid Tuesday, December 11, 2012 2:54:15 AM

Originally posted by mimi_s_mum:

Yap! Looks very familiar. I have heaps of them in and around house. For those that came in, I've found a "catch and release" approach using a glass and piece of stiff paper works very well. bigsmile



Hmm, you might have it confused with the wandering Cambridgea. This species is restricted to the northern and eastern parts of NZ. The related H. huttoni should be in your part and they have a darkened, uniform coloured abdomen. H. hochstetteri has the distinct lighter abdomen with chevrons.

The glass and paper is an excellent technique smile Much better than fly-spray or heavy shoe...

Mimis Mum (MM)mimi_s_mum Tuesday, December 11, 2012 5:48:27 AM

Hmmm. You are right. I may be confusing two kinds of big spiders. The ones I find in house may well be Cambridgea. I also do come across a type of tunnel web spiders when tidying stuff in garden, such as pulling weeds & removing dead branches off ground. Their abdomen is more black than your one and not banded. So it could be H. huttoni as you suggested. I will try taking a picture next time one of them ends up in my glass, or gloved hand. bigsmile

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