© Her Majesty the Queen in Right of Canada, 2010. Government of Alberta. There are no subspecies of Bert’s Predaceous Diving Beetle nor is there noticeable variation among the available specimens and the entire taxon is confined to a very small geographic location. These prey on various live animals including minnows. Bert’s Predaceous Diving Beetle is indicative of the remaining, reasonably uncompromised, spring and seepage habitat found in southern Alberta. (Photo courtesy of Jennie Knopp.). The “oasis” view from bottom of the cliff area, facing the location of the spring (facing west), Figure 9. Other serious threats to these fragile point sources of habitat are lowering water levels and less water availability in the Oldman River Basin. While other water beetles swim by alternating their leg movements, the diving beetle moves its legs together like oars. Since European settlement in this Ecozone, it has become one of the most developed agricultural areas in the world. ), Figure 8. Springs and seeps are important because as noted by Danks and Williams (1991) the arthropod fauna of springs contains a limited number of species and diverse, specialized organisms, including groundwater, stream and water–film specialists. COSEWIC comprises members from each provincial and territorial government wildlife agency, four federal entities (Canadian Wildlife Service, Parks Canada Agency, Department of Fisheries and Oceans, and the Federal Biodiversity Information Partnership, chaired by the Canadian Museum of Nature), three non–government science members and the co–chairs of the species specialist subcommittees and the Aboriginal Traditional Knowledge subcommittee. The Committee meets to consider status reports on candidate species. Because the species is apparently endemic to Canada, rescue from outside cannot be anticipated. Biological Journal of the Linnean Society. Bert, along with her husband, John, has been a tremendous source of specimens, information and inspiration for this project. Bay Tree, Alberta. Holotype. Species designated at meetings of the full committee are added to the list. The spring and seep habitat required by S. bertae is so small that such anthropogenic disturbances could completely destroy the habitat. The contents of the net were then placed into the top of three circular metal sieves of decreasing mesh size (50, 100 and 250 µm) and left in the sun. As with all dytiscids there would be 3 instars of larvae with the first stage (instar I) being smaller in size and qualitatively distinct from later instar larvae. Insects of Alberta - Diving Beetles : Acilius Diving Beetle : Giant Diving Beetle : Mid-Sized Diving Beetle : Neoporus superioris Return to Results Page for Missouri Insects . Any wet areas, including stream and pond edges were sampled even if springs and seeps were not present. Springs and seeps are important because their arthropod fauna includes a limited number of species and diverse and specialized organisms, including groundwater, stream and water–film specialists. Bert’s Predaceous Diving Beetle (Sanfilippodytes bertae), Roughley and Larson 2000, Coleoptera: Dytiscidae) is described from the springs and seepages in the arid grasslands of southern Alberta. The data at hand is insufficient to speculate about fluctuation of these populations. Schindler and Donahue (2006) warn of the coming drought that Alberta will face in the next few decades as a result of human pressures on the system, natural environmental fluctuations and climate change, but there remains some debate on how serious this is likely to be. Nilsson. Is there sufficient habitat for immigrants in Canada? setifer (Roughley and Larson 2000), S. bidessoides (Leech 1941) and S. adelardi (Rochette 1983)–found only in this habitat and within this limited geographic area. The VW enthusiasts upscaled the car by 40%, making it bigger than a Hummer. Giant water bugs are approximately 1.5 inches (3.8 cm) in length. These droppings could result in contamination of the water quality in the surrounding aquatic habitat. The head and pronotum are dark brown and the elytra are yellowish brown without yellowish spots or markings. Body form oval, depressed, widest anterior to middle and relatively evenly rounded laterally. There are no known subspecies or forms. Adults of this genus are collected from the interstitial spaces among sand, small stones, moss, and bits of other plant debris at springs and seeps within the larger habitat of short–grass prairie or arid grassland. 1194–1205. Vegetation, such as mosses and algae at the outflow of the spring characterize the habitat at the oasis. Status history Designated Endangered in November 2009. Bert’s Predaceous Diving Beetle might serve as an indicator species for other unusual or significant species. Also remove leaves and other debris that can hide water beetles. All predaceous water beetle larvae and adults are predaceous, principally eating invertebrates, probably enchytraeid worms and aquatic larvae of flies (Diptera). Size: Size of the adult diving beetles varies from 2 mm to 45 mm. This area was aptly nicknamed “the oasis” by the researchers (Figures 7 and figure 88). The historical distribution of S. bertae (Figure 5) includes two and possibly three localities. There are approximately 500,000 domestic wells in Alberta and an average of 7,000 new wells are added each year across the province (Alberta Environment 2008). Any additional population would be isolated by inhospitable conditions and. Sanfilippodytes, S. pacificus–group and S. vilis–group (in part). Is the total population severely fragmented? This particular spring runs out of the grassy land above the depression which leads into the oasis. Production note:COSEWIC acknowledges the late Dr. Robert E. 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