Long-tailed Orb-weaving Spider S11 Female, ventral, long tail | Long-tailed Orb-weaving Spider S12 Female, ventral | |||||
Class: | Animals (Animalia) - Jointed Legs (Arthropoda) - Spiders, Scorpions, Mites & Ticks (Arachnida) | ||||
Order: | Spiders (Araneae) | ||||
Family: | Orb-weaver Spider (Araneidae) iNaturalist Observation | ||||
Species: | Long-tailed Orb-weaving Spider (Argiope protensa) | ||||
This Photo: | S11 Female, ventral, short tail | ||||
Synonym: | Argiope extensa | ||||
Other names: | Tailed Forest Spider or Teardrop Spider | ||||
Thank you Matthew Connors, David Muirhead & Natasha (Ethmostigmus) for confirming the id of this species for us General Species Information: Found on Ellura (in the Murray Mallee, SA) and elsewhere Probably the most varied invert we come across; variations in colour pattern & body shape - occuring in one individual at times. Spiders can also "shrivel up" when hungry or just laid eggs, in this case giving them a blunt tailed apprearance rather than the typical pointy tail we see in photo's. We have tried to highlight how each individual can change it's stripes and tail length. Please note specimen ids (S1, S2, etc) to compare the differences that occur within one individual. We suspect the stripe change is to do with breathing; perhaps blowing it'self up in some defensive mechanism? The males have quite different palps. It's quite possible they are different species as the palps are diagnostic in male spiders. It may also be a juvenile vs mature specimen variation. Or some damage caused due to breeding? Recently it was recognised that A. protensa & A. extensa are actually the same species. With the "tail" being able to be retracted, size is a difficult thing to compare. Should probably do the same as reptiles & measure to the vent; or spinnerets in this case. They range in size from ~3mm for the Juvi, ~4-6mm for the males, ~6-18mm for other females. 3 to 18mm is an extreme size variation for spiders, again suggesting different species or unusual for spiders in that juveniles look identical to adults; which goes against the notion these vary so much We've had a female living in our shade house, whose grown dramatically over the last 2 weeks; she's now the biggest we've measured at ~18mm long (S17). We've now seen with her that the highly reflective/silver colour are silver hairs. Notice her large "epigeal scape". On the same day we caught a male (S16) which shows they are quite crab-spider like. | |||||
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