FIGURE 4 in The taxonomic research of Jules Richard on Cladocera (Crustacea: Branchiopoda) and his collection at the National Museum of Natural History, U.S.A.

FIGURE 4. Pleuroxus letourneuxi (Richard, 1888), parthenogenetic female from Bir el Nebech, Tunisia, tube DGF 962: (A–B) Adult, lateral and anterior view. (C) Head. (D–E) Labrum, lateral and posterior view. (F–G) Head shield. (H) Dorsal head pores. (I) Valve. (J) Its anterior margin, inner view. (K) Its antero-ventral region. (L) Postero-ventral region. (M–N) Posterior margin of valve, inner view. (O) Juvenile. Scale bars: 0.1 mm