 This thumb is typically interpreted as a close @-@ quarter stiletto @-@ like weapon against predators , although it could also have been used to break into seeds and fruits , or against other Iguanodon . One author has suggested that the spike was attached to a venom gland , but this has not been accepted , as the spike was not hollow , nor were there any grooves on the spike for conducting venom . 
 This thumb is typically interpreted as a close @-@ quarter stiletto @-@ like weapon against predators , although it could also <a href='been_done' title='1'><mark>have</mark></a> been used to break into seeds and fruits , or against other Iguanodon . One author <a href='been_done' title='2'><mark>has</mark></a> suggested that the spike was attached to a venom gland , but this <a href='been_done' title='3'><mark>has</mark></a> not been accepted , as the spike <a href='negative_concord' title='4'><mark>was</mark></a> <a href='negative_concord' title='5'><mark>not</mark></a>hollow , nor <a href='uninflect' title='6'><mark>were</mark></a> <a href='dey_it' title='7'><mark>there</mark></a> any grooves on the spike for conducting venom . 
This thumb is typically interpreted as a close @-@ quarter stiletto @-@ like weapon against predators , although it could also done been used to break into seeds and fruits , or against other Iguanodon . One author done suggested that the spike was attached to a venom gland , but dis done not been accepted , as da spike ain't hollow , nor was it any grooves on the spike fir conducting venom .