Q152

When a creature can summon other creatures, are those summoned creatures treated as part of the original monster's Challenge, or should PCs be awarded XP for them separately?

For example, if they fight a Conjurer from Volo's Guide to Monsters - the Conjurer has Conjure Elemental as one of its listed spells - presuming the Conjurer has already cast that spell before combat starts and has his loyal elemental minion, should the PCs get XP for the elemental separately?