![]() Accordingly, adequate habitat protection is necessary for rare riffle beetle species and for their conservation on the Balkan Peninsula, particularly in small streams. Because of the scarcity of species findings, their disjunct distribution and specific ecological requirements, some riffle beetle species are becoming more vulnerable to pronounced human impact. New records of 7 riffle beetle species are provided, as follows: Stenelmis puberula Reitter, 1887, Stenelmis consobrina consobrina Dufour, 1835, Potamophilus acuminatus (Fabricius, 1792), Elmis syriaca zoufali (Reitter, 1910), Elmis rioloides (Kuwert, 1890), Limnius intermedius Fairmaire, 1881 and Limnius opacus Müller, 1806, with notes on their occurrence, habitats and co occurrence with other riffle beetle taxa. The main objective of the study was to add to the knowledge of this group of aquatic insects. The body segments are usually well-sclerotized, and the body is often hemispherical or concave in cross-section (rarely rounded). comalensis) is a small aquatic beetle found exclusively in the Comal and San Marcos spring systems within the Edwards Aquifer region of Central Texas. The antennae and mouthparts are shorter than the head. Riffle beetle fauna of the Balkan Peninsula is poorly explored due to a lack of data, particularly in southern and eastern areas. Riffle beetle larvae are elongate, up to 16 mm long (most less than 8), with the head and all 3 pairs of legs visible from above. The following Balkan countries were included in the study: Serbia, Bulgaria, Romania and Bosnia and Herzegovina. Larvae and adult elmid beetles were collected during 2007-2018. Today, groundwater pumping at Edwards Aquifer is greatly reducing the water flow of the springs in which these species are found, and that could result in years - not months - of significant drying.We present new data on rare riffle beetle findings (Coleoptera: Elmidae) from the Balkan Peninsula. The fact that these invertebrates weren't extirpated at that time says a lot for their tenacity, but all three species were left devastated and still have very small populations. This beetle was specifically designated 54 acres of protected surface habitat in 2013.Īll three Comal Springs species once survived a drought that stopped the flow of the springs from June 13 through November 3, 1956. In early 2009, we filed suit with allies to gain adequate critical habitat for these three species and 14 others three years later, the Obama administration finalized critical habitat protection of 4,200 total acres for this and eight other cave-dwelling Texas species. But this designation covered a ridiculously small area - not nearly enough to ensure the invertebrates' recovery. Both larvae and adults are benthic in or on various substrates, but in many species both can control their specific gravity and are found in drift samples. Fish and Wildlife Service in 2003, and finally, four years later, critical habitat was designated for all three Comal Springs species. It is found in Central America and North America. To protect the invertebrates' home, the Center sued the U.S. Habroscelimorpha dorsalis, commonly known as the eastern beach tiger beetle, is a species of flashy tiger beetle in the family Cicindelidae. Larvae and pupae of caddisflies Marilia spp., Oecetis spp., Helicopsyche spp., and riffle beetle Microcylloepus spp. ![]() The Comal Springs riffle beetle - along with its neighbors the Comal Springs dryopid beetle and Peck's cave amphipod - was officially declared endangered in 1997, but all three species were denied critical habitat. If groundwater pumping and pollution continue to affect the Texas springs this riffle beetle calls home, it won't have much choice but to suffocate as a species. ![]() But this remarkable respiration method doesn't work well when normally clean, flowing water dries up and stagnates, reducing levels of dissolved oxygen. Family Eulichadidae A few species in Asia, North America. The aquatic Comal Springs riffle beetle sports a mass of tiny, unwettable hairs on its underside, which it uses to maintain a thin bubble of air that allows it to breathe while it swims. Other articles where riffle beetle is discussed: coleopteran: Annotated classification: Family Elmidae (riffle beetles) Varied habitat several hundred widely distributed species.
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