That kind of seems like innate manifesting to me, even if the flavor doesn't particularly lend itself to that interpretation. Maybe they could be psychic warrior manifestation or something.
Their psion manifestation would need to be higher than 5th level to give them the powers they have listed, so I'm leaning towards PLAs.
We decided a few conversions ago that there's no need for contact in 3.5 psionics, so we can just drop that. As for detonate, I have a strong feeling that we converted that as a Ps (or maybe Su) ability for a frog-like Dark Sun creature a while back. Let me see: Yes! The daggoran has:
Detonate (Ps): Three times per day, a daggoran can detonate the crystalline growth on its back. This is similar to the hail of crystals power, except any creature or object struck by the ball of crystal takes 2d4 points of bludgeoning damage, and anyone within 20 feet of the explosion takes 3d4 points of slashing damage. This is the equivalent of a 2rd-level power. Manifester level 3rd.
Something like this?
Detonate (Ps): X times per day, a geran can detonate any solid object of no more than 1/2 lb in weight within 30 ft. (Attended or magic items receive a DC X Fortitude save to negate this effect.) This is similar to the hail of crystals power, except any creature or object struck by the ball of crystal takes 2d4 points of bludgeoning damage, and anyone within 20 feet of the explosion takes 3d4 points of slashing damage. This is the equivalent of a 2rd-level power. Manifester level 3rd.
Might need to look at the hail of crystals power again to check this...