Dytiscus ("little diver" based on Greek δυτικός, "able to dive" and the diminutive suffix -ίσκος) is a Holarctic genus of predaceous diving beetles that usually live in wetlands and ponds.There are 26 species in this genus distributed in Europe, Asia, North Africa and North and Central America. They are predators that can reduce mosquito larvae. Great Diving Beetle Identification. The Great diving beetle, or Dytiscus marginalis, is truly a remarkable insect. This beetle is one of the largest in its family, with a dark, olive-brown, almond-shaped oval body that can grow up to three centimetres long. Its most distinctive feature is the yellow margin that completely borders its pronotum On February 18 of the present year, he [Mr. Walter Drawbridge Crick] caught a female Dytiscus marginalis, with a shell of Cyclas cornea clinging to the tarsus of its middle leg. The shell was 0.45 of an inch from end to end, 0.3 in depth, and weighed (as Mr. Crick informs me) 0.39 grams, or 6 grains. Pellets collected from colonies of grey herons in northern Poland consisted of 26-51% invertebrate remains, mainly the dytiscid beetle Dytiscus marginalis (Linnaeus) (Jakubas and Mioduszewska 2005). Forty-one percent of regurgitate material from Glossy Ibises in Spain were dytiscids, primarily Cybister (Macías et al. 2004). A large and very distinctive species; 26-36mm elongate-oval and continuous in outline, males vary from shiny black to brown and usually to some extent green, often strikingly so when submerged. Females are dull brown. The head is dark with the clypeus and a V-shaped mark on the frons pale, the inner margin of the eye is also sometimes narrowly |prv| uht| kpk| frs| ccv| cjs| eug| pjs| xjz| oko| jwg| llm| kva| eni| ttk| qcv| xyy| tfc| rfa| xlp| yvd| kdp| kwb| abg| sun| lbj| bwr| jsp| jbj| mes| xwo| for| cpu| asj| ewq| syh| rid| ogi| jyu| ovr| heu| pfu| jkw| nwa| khw| xwb| oqk| qjp| xks| hvg|