test

code/modules/mob/living/carbon/human/species.dm

@@ -114,6 +114,9 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 	/// Our default override for typing indicator state
 	var/typing_indicator_state
 
+	//the ids you can use for your species, if empty, it means default only and not changeable
+	var/list/allowed_limb_ids
+
 ///////////
 // PROCS //
 ///////////
@@ -121,7 +124,9 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 /datum/species/New()
 
 	if(!limbs_id)	//if we havent set a limbs id to use, just use our own id
-		limbs_id = id
+		mutant_bodyparts["limbs_id"] = id //done this way to be non-intrusive to the existing system
+	else
+		mutant_bodyparts["limbs_id"] = limbs_id
 	..()
 
 	//update our mutant bodyparts to include unlocked ones

code/modules/mob/living/carbon/human/species_types/furrypeople.dm

@@ -17,3 +17,5 @@
 	tail_type = "mam_tail"
 	wagging_type = "mam_waggingtail"
 	species_type = "furry"
+
+	allowed_limb_ids = list("lizard","pod","mammal","human","insect")

code/modules/mob/living/carbon/human/update_icons.dm

@@ -660,7 +660,7 @@ use_mob_overlay_icon: if FALSE, it will always use the default_icon_file even if
 
 //produces a key based on the human's limbs
 /mob/living/carbon/human/generate_icon_render_key()
-	. = "[dna.species.limbs_id]"
+	. = "[dna.species.mutant_bodyparts["limbs_id"]]"
 
 	if(dna.check_mutation(HULK))
 		. += "-coloured-hulk"