Phylum Arthropoda (Arthropods) ➔ Subphylum Hexapoda (Hexapods) ➔ Class Insecta (Insects) ➔ Order Coleoptera (Beetles) ➔ Family Dytiscidae (Predaceous diving beetles)
Rhantus (Rhantus) suturalis (MacLeay, 1825)
Punktierter Tauchschwimmer Supertramp Beetle
Synonyms and other combinations:
Colymbetes suturalis MacLeay, 1825 | Colymbetes pulverosus Stephens, 1828 | Rhantus (Rhantus) pulverosus |
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, female
DE, Chemnitz, Markersdorf; 2018-08-09 23:22:30
Image number: 8437
female
DE, Chemnitz, Markersdorf
2018-08-09 23:22:30
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, female
DE, Chemnitz, Markersdorf; 2018-08-09 23:23:33
Image number: 8438
female
DE, Chemnitz, Markersdorf
2018-08-09 23:23:33
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, female, det. Daniel
DE, Chemnitz, Markersdorf; 2018-08-09 23:20:58
Image number: 8439
female
DE, Chemnitz, Markersdorf
2018-08-09 23:20:58
det. Daniel
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, female, det. Daniel
DE, Chemnitz, Markersdorf; 2018-08-10 10:41:39
Image number: 8440
female
DE, Chemnitz, Markersdorf
2018-08-10 10:41:39
det. Daniel
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, bottom view, det. Daniel
DE, Chemnitz, Markersdorf; 2018-08-10 10:35:00
Image number: 8441
bottom view
DE, Chemnitz, Markersdorf
2018-08-10 10:35:00
det. Daniel
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, exuvia
DE, Chemnitz, Markersdorf; 2018-08-16 14:26:39
Image number: 8451
exuvia
DE, Chemnitz, Markersdorf
2018-08-16 14:26:39
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva and eggs
DE, Chemnitz, Markersdorf; 2018-08-16 14:54:54
Image number: 8449
larva and eggs
DE, Chemnitz, Markersdorf
2018-08-16 14:54:54
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-16 14:52:47
Image number: 8450
larva
DE, Chemnitz, Markersdorf
2018-08-16 14:52:47
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, exuvia
DE, Chemnitz, Markersdorf; 2018-08-18 10:46:20
Image number: 8461
exuvia
DE, Chemnitz, Markersdorf
2018-08-18 10:46:20
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-18 15:26:00
Image number: 8462
larva
DE, Chemnitz, Markersdorf
2018-08-18 15:26:00
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-18 15:31:33
Image number: 8463
larva
DE, Chemnitz, Markersdorf
2018-08-18 15:31:33
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-19 09:24:26
Image number: 8464
larva
DE, Chemnitz, Markersdorf
2018-08-19 09:24:26
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-20 09:11:33
Image number: 8465
larva
DE, Chemnitz, Markersdorf
2018-08-20 09:11:33
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, larva
DE, Chemnitz, Markersdorf; 2018-08-23 09:51:50
Image number: 8469
larva
DE, Chemnitz, Markersdorf
2018-08-23 09:51:50
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, dead larva
DE, Chemnitz, Markersdorf; 2018-08-24 09:53:30
Image number: 8471
dead larva
DE, Chemnitz, Markersdorf
2018-08-24 09:53:30
Rhantus suturalis (MacLeay, 1825) Punktierter Tauchschwimmer Supertramp Beetle
Rhantus (Rhantus) suturalis, bottom view
DE, Chemnitz, Markersdorf; 2018-08-24 16:13:29
Image number: 8470
bottom view
DE, Chemnitz, Markersdorf
2018-08-24 16:13:29
Further vernacular names:
Cosmopolitan Diving Beetle
Classification:
Rhantus suturalis belongs to the subfamily Colymbetinae, tribe Colymbetini.
Distribution:
Europe, Asia, Africa, Australia, New Zealand.
Habitat:
Waters, such as ponds, lakes, streams.
Description:
Length 10.5 - 12.5 mm; underside black; elytra reticulated; pronotum usually with dark central patch, sometimes black hemmed at the back and front edge; antennae completely yellow.
Biology:
With their streamlined body and hind legs ideal for paddling, the predaceous diving beetles are perfectly adapted to life in the water. When hunting underwater, they come up from time to time in order to renew the supply of breathing air stored under the elytra.
An important food source of the imagines and larvae of
Rhantus suturalis are larvae of midges.
The beetles are good flyers. As soon as a waterhole dries out, they leave it and search for a new suitable habitat.
Annotation:
Attracted by the light, the beetle flew in at night through the open balcony door and laid a few eggs on damp paper on August 10. After a few days, on August 16th, I found the 1st exuvia and the small larva shown here in the vessel with the eggs. The larva has shed its skin (2nd exuvia of August 18th) and eaten the offered water fleas. It still ate on August 23rd and reached a length of about 9 mm. Unfortunately, the larva was dead the next day. Probably there were problems with the skinning, because the skin on the back was partly torn open.
The contrast of the images of eggs, larva and exuviae has been increased. The eggs are yellowish white and the larva looks a little brighter and more transparent in the original.
References, further reading, links:
- de Jong, Y.S.D.M. (ed.) (2013) Fauna Europaea version 2.6.2 Web Service available online at https://fauna-eu.org/
- Arved Lompe: Die Käfer Europas - Ein Bestimmungswerk im Internet