diff --git a/internal-dev/iao-ext.owl b/internal-dev/iao-ext.owl
index 400f3d2a..313e758c 100644
--- a/internal-dev/iao-ext.owl
+++ b/internal-dev/iao-ext.owl
@@ -345,6 +345,16 @@
     
 
 
+    <!-- http://purl.enanomapper.net/onto/ENM_1850054 -->
+
+    <owl:Class rdf:about="http://purl.enanomapper.net/onto/ENM_1850054">
+        <rdfs:subClassOf rdf:resource="http://purl.enanomapper.org/onto/ENM_8000029"/>
+        <rdfs:isDefinedBy>Information entity classifying cells based on their origin</rdfs:isDefinedBy>
+        <rdfs:label xml:lang="en">cell type classification</rdfs:label>
+    </owl:Class>
+
+
+
     <!-- http://purl.enanomapper.org/onto/ENM_8000033 -->
 
     <owl:Class rdf:about="http://purl.enanomapper.org/onto/ENM_8000033">