Figure 2
From: Structural aspects of leg-to-gonopod metamorphosis in male helminthomorph millipedes (Diplopoda)
Anamorphic development of the millipede species studied in the present paper. The post-embryonic developmental stadia are numbered progressively. Walking legs are depicted as short lines, ventrally attached to the corresponding trunk ring, gonopod primordia as small ventral blobs on trunk ring VII, gonopods (two pairs in A-C, one pair in D) as complex structures also attached to trunk ring VII. (A) Nopoiulus kochii. (B) Blaniulus guttulatus. (C) Nemasoma varicorne. (D) Oxidus gracilis. From stadium VI on, in B. guttulatus only the anterior trunk is shown; in N varicorne, gonopods are sometimes formed at stadium VI.