diff --git a/graphify/extractors/engine.py b/graphify/extractors/engine.py
index 723606e64..7a2470f21 100644
--- a/graphify/extractors/engine.py
+++ b/graphify/extractors/engine.py
@@ -969,7 +969,8 @@ def _scala_collect_type_refs(node, source: bytes, generic: bool, out: list[tuple
                         _scala_collect_type_refs(arg, source, True, out)
         return
     if t in ("compound_type", "infix_type", "function_type", "tuple_type",
-             "annotated_type", "projected_type"):
+             "annotated_type", "projected_type", "match_type",
+             "type_case_clause"):
         for c in node.children:
             if c.is_named:
                 _scala_collect_type_refs(c, source, generic, out)
@@ -3074,8 +3075,11 @@ def _emit_java_parent_type(type_node, rel: str, at_line: int) -> None:
                 type_table[prop_name] = prop_type
             return
 
+        # type_definition covers plain aliases (`type Alias = List[Int]`),
+        # `opaque type`, and match types — the right-hand side sits under the
+        # same `type` field a val/var annotation uses, so the walk is shared.
         if (config.ts_module == "tree_sitter_scala"
-                and t in ("val_definition", "var_definition")
+                and t in ("val_definition", "var_definition", "type_definition")
                 and parent_class_nid):
             type_node = node.child_by_field_name("type")
             if type_node is not None:
diff --git a/tests/fixtures/sample.scala b/tests/fixtures/sample.scala
index 8a35888d8..4c1867e71 100644
--- a/tests/fixtures/sample.scala
+++ b/tests/fixtures/sample.scala
@@ -27,3 +27,12 @@ object HttpClientFactory {
     new HttpClient(Config(baseUrl, 30))
   }
 }
+
+class TypeAliases {
+  type Routes = Map[String, HttpClient]
+  opaque type ClientId = Long
+  type Unwrap[X] = X match {
+    case Option[t] => t
+    case ListBuffer[t] => t
+  }
+}
diff --git a/tests/test_languages.py b/tests/test_languages.py
index aff689d2a..85dd3eaaf 100644
--- a/tests/test_languages.py
+++ b/tests/test_languages.py
@@ -765,6 +765,24 @@ def test_scala_method_return_type_context():
     assert ("create", "HttpClient") in _edge_labels(r, "references", "return_type")
 
 
+def test_scala_type_alias_rhs_references():
+    r = extract_scala(FIXTURES / "sample.scala")
+    assert ("TypeAliases", "Map") in _edge_labels(r, "references", "field")
+    assert ("TypeAliases", "HttpClient") in _edge_labels(r, "references", "generic_arg")
+
+
+def test_scala_opaque_type_rhs_references():
+    r = extract_scala(FIXTURES / "sample.scala")
+    assert ("TypeAliases", "Long") in _edge_labels(r, "references", "field")
+
+
+def test_scala_match_type_case_references():
+    r = extract_scala(FIXTURES / "sample.scala")
+    labels = _edge_labels(r, "references", "field")
+    assert ("TypeAliases", "Option") in labels
+    assert ("TypeAliases", "ListBuffer") in labels
+
+
 def test_scala_call_edges_have_call_context():
     r = extract_scala(FIXTURES / "sample.scala")
     call_edges = _edges_with_relation(r, "calls")