diff --git a/sdf/1.11/particle_emitter.sdf b/sdf/1.11/particle_emitter.sdf
index 8e88aa89a..d6a2fdf7e 100755
--- a/sdf/1.11/particle_emitter.sdf
+++ b/sdf/1.11/particle_emitter.sdf
@@ -7,7 +7,7 @@
   </attribute>
 
   <attribute name="type" type="string" default="point" required="1">
-    <description>The type of a particle emitter. One of "box", "cylinder", "cone", "ellipsoid", or "point".</description>
+    <description>The type of a particle emitter. One of "box", "cylinder", "ellipsoid", or "point".</description>
   </attribute>
 
   <element name="emitting" type="bool" default="true" required="0">
diff --git a/sdf/1.12/particle_emitter.sdf b/sdf/1.12/particle_emitter.sdf
index aec7b90cc..d6a2fdf7e 100755
--- a/sdf/1.12/particle_emitter.sdf
+++ b/sdf/1.12/particle_emitter.sdf
@@ -7,7 +7,7 @@
   </attribute>
 
   <attribute name="type" type="string" default="point" required="1">
-    <description>The type of a particle emitter. One of "box", "cone", "cylinder", "ellipsoid", or "point".</description>
+    <description>The type of a particle emitter. One of "box", "cylinder", "ellipsoid", or "point".</description>
   </attribute>
 
   <element name="emitting" type="bool" default="true" required="0">
@@ -26,8 +26,6 @@
     depending on the emmiter type:
       - point: The area is ignored.
       - box: The area is interpreted as width X height X depth.
-      - cone: The area is interpreted as the bounding box of the
-                  cone. The cone is oriented along the Z-axis.
       - cylinder: The area is interpreted as the bounding box of the
                   cylinder. The cylinder is oriented along the Z-axis.
       - ellipsoid: The area is interpreted as the bounding box of an