Now here are few features to study

• Six eyes

• Two tails(I do not know you noticed it before or not)

• Three digits on hands and legs

• External ears

• Hairs

Now detail on each

SIX EYES

Spiders have compound eyes and eight in number

Monkeys have two simple eyes

So here SM (spider monkey) do not resemble any.It is safe to assume SM has both spider and monkey like eyes.

TWO TAILS

Spiders do not have any tail

While Monkey posses a tail

SM has two tails and it is safe to say he is all monkey by tails

DIGITS

Spiders do not have any digit on legs(they kinda do not have hands)

While different monkey have different digits(all monkey at least posses digits

So SM here is too near to monkey and nothing like spider

EXTERNAL EARS

Only mammals posses external ears....... arthopods don't

So SM here is monkey and not spider

HAIRS

It is another feature of most mammals...

Insects and other animals have hair like growths

But these dense clusters of hair tell me that SM is monkey not spider

ARMS

SM has more arms then monkeys but on other hand spiders do not have any arm.....SM is monkey(Do i have to repeat it always :0 )

CONCLUSION

Spider monkey is nothing like a spider. I guess he is simply a Spider monkey as this one

With spider like powers no not spider like powers with web shooting ability.

To have Spider senses he at least should have organ or limb or something which might explain he is spider here and not monkey

Like fangs,antena etc