NPCs composing that spawngroup :

greater_skeleton (50%)

scalebone_skeleton (50%)

NPCs spawning around that spawngroup :
(Max range : 100)

kurn_4, range=91 (15,-58,127)

an_odd_mole (100%)

kurn_8, range=98 (28,-61,4)

kurn_9, range=19 (0,13,3)

scalebone_skeleton (100%)

kurn_18, range=57 (-70,30,-39)

Burynai_excavator (100%)

kurn_34, range=67 (21,86,-116)

lesser_charbone_skeleton (100%)

kurn_44, range=4 (-9,29,-116)

kurn_57, range=97 (19,-63,134)

greater_scalebone (100%)

kurn_68, range=57 (22,-17,-118)

kurn_74, range=65 (38,70,-116)

kurn_91, range=27 (-30,8,-39)

kurn_92, range=89 (11,-57,-39)

kurn_93, range=89 (29,-50,-39)

Burynai_excavator (100%)

kurn_94, range=93 (67,-19,-39)

kurn_132, range=41 (-8,70,-39)

Burynai_excavator (50%)
Burynai_sapper (50%)

kurn_133, range=61 (-51,77,-39)

kurn_134, range=77 (-84,61,-39)

Burynai_Excavator (50%)
Burynai_Excavator (50%)

kurn_149, range=53 (-63,9,-30)

kurn_151, range=93 (-106,18,-39)

kurn_152, range=85 (-88,-11,-30)

kurn_153, range=62 (-62,-10,-30)

kurn_160, range=48 (-53,1,9)

greater_skeleton (100%)
greater_skeleton (100%)

kurn_166, range=38 (-50,39,104)

kurn_170, range=82 (22,-46,131)

kurn_183, range=79 (13,104,6)

greater_skeleton (100%)

kurn_184, range=78 (-85,61,106)

greater_skeleton (50%)
scalebone_skeleton (50%)

kurn_185, range=48 (-39,-12,104)

kurn_186, range=74 (-58,-30,104)

kurn_187, range=49 (13,-13,104)

kurn_192, range=13 (0,31,-39)

fingered_skeleton (20%)
thick_boned_skeleton (80%)

kurn_193, range=21 (-35,31,-39)

thick_boned_skeleton (100%)

#Crackling_Bones_189490, range=54 (-31,80,-39)

#Crackling_Bones (25%)
lesser_charbone_skeleton (75%)