Figure 21 from: Sands AF, Glöer P, Gürlek ME, Albrecht C, Neubauer TA (2020) A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution 96(1): 25-66. https://doi.org/10.3897/zse.96.48312

Figure 21 Theodoxus syriacus (Bourguignat, 1852). A–D. Specimen collected at Sultanköyü, Mardin, Turkey (UGSB 24182); E–H. Specimen from the Yanarsu Stream, Alıçlı, Turkey (UGSB 20518). I–L. Specimen collected near Başdeğirmen, Diyarbakır, Turkey (UGSB 24183); M–O; P–R. Two specimens collected by Bourguignat from İskenderun, Turkey (MHNG-MOLL-111712). All UGSB specimens incorporated into the phylogeny (Fig. 2). Scale bars: 1 mm.