diff --git a/codegen/src/main/java/ObjectLayerGenerator.java b/codegen/src/main/java/ObjectLayerGenerator.java
index 78e4f11c4..9c5a31144 100644
--- a/codegen/src/main/java/ObjectLayerGenerator.java
+++ b/codegen/src/main/java/ObjectLayerGenerator.java
@@ -45,7 +45,10 @@ private record ClassSpec(String objectKey, String interfaceName, String superInt
     /** The interfaces this generator emits, superclass before subclass. */
     private static final List<ClassSpec> SPECS = List.of(
             new ClassSpec("Temporal", "GeneratedTemporal", null, true),
-            new ClassSpec("TNumber", "GeneratedTNumber", "GeneratedTemporal", false));
+            new ClassSpec("TNumber", "GeneratedTNumber", "GeneratedTemporal", false),
+            new ClassSpec("TInt", "GeneratedTInt", "GeneratedTNumber", false),
+            new ClassSpec("TFloat", "GeneratedTFloat", "GeneratedTNumber", false),
+            new ClassSpec("TBigint", "GeneratedTBigint", "GeneratedTNumber", false));
 
     /** The interface this run emits. */
     private ClassSpec spec;
@@ -399,7 +402,7 @@ && cleanType(fn.path("returnType").path("c").asText()).equals("Temporal *")) {
         String arrayElement = arrayElementSubtype(retC);
         String arrayKind = arrayElement != null ? "objectArray"
                 : retC.equals("TimestampTz *") ? "scalarArray"
-                : retC.equals("Span *") ? "spanArray"
+                : retC.equals("Span *") && spec.spanReturnsAreTime() ? "spanArray"
                 : retC.equals("TBox *") ? "tboxArray"
                 : retC.equals("Match *") ? "matchArray"
                 : null;
diff --git a/jmeos-core/src/test/java/types/temporal/generated/GeneratedConcreteNumberParityTest.java b/jmeos-core/src/test/java/types/temporal/generated/GeneratedConcreteNumberParityTest.java
new file mode 100644
index 000000000..4849478f0
--- /dev/null
+++ b/jmeos-core/src/test/java/types/temporal/generated/GeneratedConcreteNumberParityTest.java
@@ -0,0 +1,90 @@
+package types.temporal.generated;
+
+import functions.GeneratedFunctions;
+import jnr.ffi.Pointer;
+import org.junit.jupiter.api.Test;
+import types.basic.tfloat.TFloatSeq;
+import types.basic.tint.TIntSeq;
+import types.temporal.Temporal;
+import types.temporal.TemporalType;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * Proves the generated concrete numeric surfaces ({@link GeneratedTInt}, {@link GeneratedTFloat})
+ * delegate correctly, each method checked against a direct call to the underlying
+ * {@code GeneratedFunctions} wrapper. The concrete surfaces resolve the base value type from the
+ * catalog — {@code int} for tint, {@code double} for tfloat — so the base scalars, base arguments and
+ * conversions marshal directly, with no per-class configuration.
+ *
+ * <p>Each surface is exercised through an adapter over its hand temporal, so the test needs no change to
+ * the hand classes; the interface inherits the three contract methods from {@code GeneratedTemporal}.
+ */
+public class GeneratedConcreteNumberParityTest {
+
+    private static GeneratedTInt genInt(Temporal t) {
+        return new GeneratedTInt() {
+            @Override public Pointer getInner() { return t.getInner(); }
+            @Override public String getCustomType() { return t.getCustomType(); }
+            @Override public TemporalType getTemporalType() { return t.getTemporalType(); }
+        };
+    }
+
+    private static GeneratedTFloat genFloat(Temporal t) {
+        return new GeneratedTFloat() {
+            @Override public Pointer getInner() { return t.getInner(); }
+            @Override public String getCustomType() { return t.getCustomType(); }
+            @Override public TemporalType getTemporalType() { return t.getTemporalType(); }
+        };
+    }
+
+    private static long id(Pointer inner) {
+        return Integer.toUnsignedLong(GeneratedFunctions.temporal_hash(inner));
+    }
+
+    private static long id(Temporal t) {
+        return id(t.getInner());
+    }
+
+    @Test
+    void intSurfaceMatchesTheLibrary() {
+        TIntSeq a = new TIntSeq("[1@2019-09-01, 3@2019-09-02, 2@2019-09-03]");
+        Pointer p = a.getInner();
+        GeneratedTInt g = genInt(a);
+
+        // Base int accessors resolve directly from the concrete catalog return type.
+        assertEquals(GeneratedFunctions.tint_min_value(p), g.minValue());
+        assertEquals(GeneratedFunctions.tint_max_value(p), g.maxValue());
+        assertEquals(GeneratedFunctions.tint_start_value(p), g.startValue());
+        assertEquals(GeneratedFunctions.tint_end_value(p), g.endValue());
+
+        // Base int arguments and a conversion, wrapped back into the object layer.
+        assertEquals(id(GeneratedFunctions.tint_at_value(p, 2)), id(g.atValue(2)));
+        assertEquals(id(GeneratedFunctions.tint_minus_value(p, 2)), id(g.minusValue(2)));
+        assertEquals(id(GeneratedFunctions.tint_shift_value(p, 5)), id(g.shiftValue(5)));
+        assertEquals(id(GeneratedFunctions.tint_to_tfloat(p)), id(g.toTfloat()));
+
+        assertEquals(GeneratedFunctions.tint_out(p), g.out());
+    }
+
+    @Test
+    void floatSurfaceMatchesTheLibrary() {
+        // Step interpolation, so the conversion to a temporal integer is defined.
+        TFloatSeq a = new TFloatSeq("Interp=Step;[1@2019-09-01, 3@2019-09-02, 2@2019-09-03]");
+        Pointer p = a.getInner();
+        GeneratedTFloat g = genFloat(a);
+
+        // Base double accessors.
+        assertEquals(GeneratedFunctions.tfloat_min_value(p), g.minValue());
+        assertEquals(GeneratedFunctions.tfloat_max_value(p), g.maxValue());
+
+        // Base double arguments, a math accessor and a conversion.
+        assertEquals(id(GeneratedFunctions.tfloat_at_value(p, 2.0)), id(g.atValue(2.0)));
+        assertEquals(id(GeneratedFunctions.tfloat_minus_value(p, 2.0)), id(g.minusValue(2.0)));
+        assertEquals(id(GeneratedFunctions.tfloat_shift_value(p, 5.0)), id(g.shiftValue(5.0)));
+        assertEquals(id(GeneratedFunctions.tfloat_sin(p)), id(g.sin()));
+        assertEquals(id(GeneratedFunctions.tfloat_to_tint(p)), id(g.toTint()));
+
+        assertEquals(GeneratedFunctions.tfloat_out(p, 6), g.out(6));
+    }
+}