This spell functions as summon swarm, except you summon a swarm of poisonous frogs. This swarm has the statistics of a centipede swarm, except it has the animal type and its poison deals Constitution damage instead of Dexterity damage.
Section 15: Copyright Notice - Pathfinder Roleplaying Game Ultimate Magic
Pathfinder Roleplaying Game Ultimate Magic. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.