diff --git a/packages/jsdoc-core/lib/name.js b/packages/jsdoc-core/lib/name.js
index 84866140..980da417 100644
--- a/packages/jsdoc-core/lib/name.js
+++ b/packages/jsdoc-core/lib/name.js
@@ -139,14 +139,16 @@ export const getTrailingScope = (name) => {
 };
 
 /**
- * Get a symbol's basename, which is the first part of its full name before any punctuation (other
- * than an underscore). For example, all of the following names have the basename `Foo`:
+ * Get a symbol's basename, which is the first part of its full name before any scope punctuation.
+ * For example, all of the following names have the basename `Foo`:
  *
  * + `Foo`
  * + `Foo.bar`
  * + `Foo.prototype.bar`
  * + `Foo#bar`
  *
+ * Similarly, the longname `module:@foo/bar.Baz` has the basename `module:@foo/bar`.
+ *
  * @param {?string} [name] - The symbol's full name.
  * @returns {?string} The symbol's basename.
  */
@@ -155,7 +157,7 @@ export function getBasename(name) {
     return null;
   }
 
-  return name.replace(/^([$a-z_][$a-z_0-9]*).*?$/i, '$1');
+  return name.replace(/^((?:[a-z]+:)?[$a-z@_][$a-z_/0-9]*).*?$/i, '$1');
 }
 
 // TODO: docs
diff --git a/packages/jsdoc-core/test/specs/lib/name.js b/packages/jsdoc-core/test/specs/lib/name.js
index 559b521e..0c16f33f 100644
--- a/packages/jsdoc-core/test/specs/lib/name.js
+++ b/packages/jsdoc-core/test/specs/lib/name.js
@@ -127,6 +127,14 @@ describe('@jsdoc/core.name', () => {
     it('returns the basename if the original value has punctuation', () => {
       expect(name.getBasename('foo.Bar#baz')).toBe('foo');
     });
+
+    it('returns the basename if the original value starts with a namespace', () => {
+      expect(name.getBasename('module:foo.Bar')).toBe('module:foo');
+    });
+
+    it('returns the basename if the original value is a module identifier with `@` and `/`', () => {
+      expect(name.getBasename('module:@foo/bar.Baz')).toBe('module:@foo/bar');
+    });
   });
 
   describe('getLeadingScope', () => {