The aquatic Adephaga of the Makay, central-western Madagascar, with description of two new diving beetle species (Coleoptera, Gyrinidae, Haliplidae, Noteridae, Dytiscidae) Author Ramahandrison, Andriamirado Tahina https://orcid.org/0000-0002-0833-8730 Departement de Biologie et Ecologie Vegetales, Faculte des Sciences, BP 906, Universite d'Antananarivo, Antananarivo, Madagascar & Sorbonne Universite, Institut de Systematique, Evolution, Biodiversite (UMR 7205), MNHN SU CNRS EPHE UA, Case 05, 7 quai St Bernard, Paris, France Author Rakouth, Bakolimalala https://orcid.org/0000-0001-5710-2006 Departement de Biologie et Ecologie Vegetales, Faculte des Sciences, BP 906, Universite d'Antananarivo, Antananarivo, Madagascar Author Manuel, Michael Sorbonne Universite, Institut de Systematique, Evolution, Biodiversite (UMR 7205), MNHN SU CNRS EPHE UA, Case 05, 7 quai St Bernard, Paris, France manuel1570@yahoo.fr text ZooKeys 2022 2022-11-02 1127 1 60 http://dx.doi.org/10.3897/zookeys.1127.85737 journal article http://dx.doi.org/10.3897/zookeys.1127.85737 1313-2970-1127-1 4759AFC32EFD47A7853F645FB32829BA D72971CE12A85992AFFD69F186474E85 Canthydrus concolor Sharp, 1882 Type locality. Madagascar. Material examined. 1 ♂ : MAK-2. Distribution. Madagascar, widespread ( Guignot 1959-1961 ; Bertrand and Legros 1971 ; Rocchi 1991 ; Nilsson 2011 ). Habitat in study area (Fig. 2B, C ). This species is widespread and generally common in Madagascar, in well-vegetated lentic or calm lotic environments. It is seemingly absent from inner Makay, and was sampled only once in a peripheral site. The habitat was a shallow insolated stream characterised by very weak water flow, sandy bottom, marked by anthropic disturbance (cattle trampling), sparse tufts of small Cyperaceae and strong presence of filamentous green algae.