Perkins, Philip D., 2021, Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae)

Perkins, Philip D., 2021, Taxonomy of water beetles in the genus Hydrochus Leach, 1817, from Bolivia, Brazil and Paraguay (Coleoptera: Hydrochidae), Zootaxa 4994 (1), pp. 1-93

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Hydrochus spanglerorum     12
Hydrochus argutus     12
Hydrochus collaris     12
Hydrochus leei     12
Hydrochus robustus     13
Hydrochus sculptissimus     13
Hydrochus xingu     13-15
Hydrochus accinctus   new species  15
Hydrochus amazonicus   new species  15-16
Hydrochus ampliarmus   new species  16-17
Hydrochus argutulus   new species  17
Hydrochus artus   new species  17-18
Hydrochus austrinus   new species  18
Hydrochus canalis   new species  19
Hydrochus casuarius   new species  19-20
Hydrochus clandestinus   new species  20
Hydrochus colossus   new species  21
Hydrochus compactus   new species  21-22
Hydrochus constrictus   new species  22
Hydrochus curvus   new species  22-23
Hydrochus diffusus   new species  23-24
Hydrochus distinctulus   new species  24
Hydrochus distinctus   new species  25
Hydrochus diversus   new species  25-26
Hydrochus forcipuloides   new species  26
Hydrochus forcipulus   new species  27
Hydrochus fritillus   new species  27-28
Hydrochus irregularis   new species  28-29
Hydrochus liquidus   new species  29
Hydrochus longissimus   new species  29-30
Hydrochus membraneus   new species  30
Hydrochus personatus   new species  31
Hydrochus potenspiculatus   new species  31-32
Hydrochus pronotulus   new species  32
Hydrochus quinarius   new species  33
Hydrochus rectus   new species  33-34
Hydrochus reticulatus   new species  34-35
Hydrochus robustus   new species  35
Hydrochus sculptissimus   new species  35-36
Hydrochus triangularis   new species  36-37
Hydrochus trituberculatus   new species  37
Hydrochus usualis   new species  37-38
Hydrochus velatus   new species  38-39
Hydrochus xingu   new species  39-40
Hydrochus alternatus     40
Hydrochus argutus     40
Hydrochus astrictus     40
Hydrochus baloghi     40
Hydrochus basilaris     41
Hydrochus bicarinatus     41
Hydrochus bisinuatus     41
Hydrochus bituberculatus     41-42
Hydrochus choennii     42
Hydrochus coeneni     42
Hydrochus collaris     42-43
Hydrochus cracentis     43
Hydrochus denarius     43
Hydrochus drakei     43
Hydrochus drechseli     44
Hydrochus ducalis     44
Hydrochus elsjeae   new status  44-45
Hydrochus formosus     45
Hydrochus hellmani     45
Hydrochus jenniferiduae   new status  45
Hydrochus kellymilleri     45-46
Hydrochus leei     46
Hydrochus lobatus     46
Hydrochus merkli   new status  46-47
Hydrochus lobissimus     47-48
Hydrochus obscurus     48
Hydrochus pietersenae     49
Hydrochus piroei     49
Hydrochus pumilio     49-50
Hydrochus pupillus     50
Hydrochus purpureus     50
Hydrochus radhakishunae   new status  50
Hydrochus richteri     51
Hydrochus secretus     51
Hydrochus shorti     51
Hydrochus soekhnandanae     52
Hydrochus spanglerorum     52
Hydrochus tarsalis     52
Hydrochus variabilis     53
Hydrochus zicsii   new status  54