This study addresses the diversity of deep soil beetles on old continental island Madagascar. We highlight Coleoptera as only order insects repeatedly occupying (=endogean) habitat. describe and illustrate flotation technique used during our fieldwork in Madagascar December 2019. focus method’s high-output mobile technicalities. document 51 samples, each about 20 litres volume, taken by us vary...

The tribe Macrodactylini (Coleoptera: Scarabaeidae: Melolonthinae) is reviewed from southern South America.  A total of 13 genera and 33 species were found in the study area consisting of Argentina from Neuquén south and Chile from IV Región de Coquimbo south. The following three new genera are described: Extenuoptyophis, Insimuloissacaris, and Neuquenodactylus.  The following 11 new species ar...

Meiotic and mitotic chromosomes of Dichotomius nisus, D. semisquamosus and D. sericeus were analyzed after conventional staining, C-banding and silver nitrate staining. In addition, Dichotomius nisus and D. semisquamosus chromosomes were also analyzed after fluorescent in situ hybridization (FISH) with an rDNA probe. The species analyzed had an asymmetrical karyotype with 2n = 18 and meta-subme...

African beetles Onthophagus gazella from both sexes were analyzed by electrophoresis for an investigation of esterase isozymes using alpha-naphthyl propionate and methylumbelliferyl propionate as substrates. Only one of the esterases (Est. 6) reacted with one of the substrates (alpha-naphthyl propionate). Six areas of activity were found, two of them being polymorphic (Est. 3 and Est. 4). For p...