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One of the most important limiting factors for diving beetle occurrence is the presence of fish, which predate on the beetles (mostly on larvae), compete for food, and change the structure of the habitat. The presence or absence of fish can also affect habitat use and habitat selection of dytiscids.
The black seadevil family, Melanocetidae and the genus name Melanocetus are a combination of melanos meaning "black" and cetus, which means a "large sea creature", typically used to refer to whales. [6] Günther did not explain this choice of name but did note the uniform black colour, including the inside of the mouth of M. johnsoni. [7]
This beetle is similar in structure to the better-known and widespread D. marginalis, but it is clearly larger and especially wider. The species is usually easy to recognize by the extensions on both sides of the shield. The elytra and the pronotum are dark brown with yellow sides. The head is black, while the legs are yellow. The male's wing ...
The blotched foxface (Siganus unimaculatus), also called the blackblotch foxface or one-spot foxface, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found at reefs and lagoons in the central Indo-Pacific. Except for the black spot on the rear upper body, it resembles the closely related foxface ...
Calosoma is a genus of large ground beetles that occur primarily throughout the Northern Hemisphere, and are referred to as caterpillar hunters or caterpillar searchers. Many of the 167 species are largely or entirely black, but some have bright metallic coloration. They produce a foul-smelling spray from glands near the tip of the abdomen.
Eleodes (commonly known as pinacate beetles or desert stink beetles) is a genus of darkling beetles, in the family Tenebrionidae. [1] They are endemic to western North America ranging from southern Canada to central Mexico with many species found along the Mexico-United States border. [2] Some species have been introduced to Colombia.
The foxface rabbitfish (Siganus vulpinus), also known as the foxface, black-face rabbit fish, badger fish or the common foxface is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the Indian and Pacific Oceans. It can be found in the aquarium trade.
Semi-, numerical prefix meaning "half" and sulcatus meaning “grooved” or "furrowed", which is in reference to the parallel grooves underneath the body of the beetle. It is commonly known as Brown-bellied Great Diving Beetle, [3] or Black bellied Great Diving Beetle. [4] [5] This is due to the dark colour of the under bellies of the beetles. [5]