Taxonomic revision of the genus Copelatus of Madagascar (Coleoptera, Dytiscidae, Copelatinae): the non- erichsonii group species Author Ranarilalatiana, Tolotra Author Raveloson Ravaomanarivo, Lala Harivelo Author Bergsten, Johannes text ZooKeys 2019 869 19 90 http://dx.doi.org/10.3897/zookeys.869.33997 journal article http://dx.doi.org/10.3897/zookeys.869.33997 1313-2970-869-19 B7C88A64C06E4B67A352F2F9C8FB0D1C C44C602AB0235FB2922DC2A4915C3288 Copelatus (Ivohibe and North of Toamasina): sp. 3 Fig. 9D Material studied. Fianarantsoa. Ihorombe: Ivohibe : -3♀ (NHRS): // NHRS-JLKB | 000010856, 65699, 65734 // Madagascar: Fianarantsoa: Ihorombe: R.S. Pic | d'Ivohibe : Andaranovory: close to botanical | transect R.S. Pic d'Ivohibe : S22.47511667 | E046.9559, 1106 m, 10.XII.2013, GB Nets and | sieves: small lake with dead leaves and | vegetation, Leg. J.H. Randriamihaja & | T. Ranarialalatiana: Field# MAD13-61 // Copelatus sp. nov. | C. insuetus complex | Det. Ranarilalatiana | & Bergsten, 2019 // Toamasina. Atsinanana: Toamasina, Toamasina II : -1♀ (NHRS): // NHRS-JLKB | 000010811 // Madagascar: Toamasina II: Analalava | reserve: MAD17-12: S of nursery plants: | S17.71055; E49.45002; 39 m: Forest | stream with side pools: 09/03/2017; | Leg. T. Ranarilalatiana // Copelatus sp. nov. | C. insuetus complex | Det. Ranarilalatiana | & Bergsten, 2019 // -1♀ (NHRS): // NHRS-JLKB | 000010779 // Madagascar: Toamasina: | Antsinanana: RN2, 6Km N | Toamasina by bridge: S18.06493 | E049.37856, 0 m. 15.XI.2011, | GB Nets and sieves: river and | sidepool: Field# MAD11-52 // Leg. J. Bergsten, R. | Bukontaite, T | Ranarilalatiana & | J.H. Randriamihaja // Copelatus sp. nov. | C. insuetus complex | Det. Ranarilalatiana | & Bergsten, 2019 // Comments. The DNA data revealed that these females represent one or possibly two additional new species in the C. insuetus complex ( Figs 2 , 3 ). In fact, the CO1 data reveals that they are the most divergent in that group and are sister to a clade with all the other species: C. insuetus , C. vokoka , C. kely , and C. ankaratra . The genetic distance between members of these two clades ranges from a minimum of 4.5% to a maximum of 7.1%, strongly indicating a separately evolving unit. The genetic distance between the specimens from Ivohibe and those from north of Toamasina was 2.3-2.4% (K2P), a distance that does not rule out conspecificity as the geographic and altitudinal distance are substantial between these localities (for distribution see Fig. 12C ). It is also on the same level as the intraspecific distance found within C. ankaratra between a peak population and a population at lower altitude of the Ankaratra Massif between which we do not find any morphological character differences to justify further separation. On the other hand, C. kely and C. insuetus are indistinguishable based on CO1 squences alone ( Figs 2 , 3 ). We refrain from describing these as a new species since the shape of male genitalia is very important for identification in this group. Morphologically we note the following based on the females: in body size this species is similar to C. vokoka , slightly larger than C. kely but slightly smaller than C. insuetus and C. ankaratra . Compared with females of C. vokoka , Copelatus sp. 3 has a narrower testaceous basal band, flatter elytral intervals between striae, and more limited striolation on pronotum, restricted to posterolateral corners. Copelatus ankaratra can be distinguished based on its dark colour and extremely elongate body shape. Small C. insuetus females can often be distinguished on the posteriorly extended testaceous basal medial band. It is most difficult to distinguish Copelatus sp. 3 females from large female specimens of C. kely . Figure 12. Distribution maps of Copelatus species. A C. insuetus (circle), C. pseudostriatus sp. nov. (square) B C. kely sp. nov. (circle), C. vokoka sp. nov. (square) C C. ankaratra sp. nov. (circle), C. sp. 3 (square) D C. safiotra sp. nov. (circle), C. befasicus (square).