![]() San Marcos (TX): Texas State University.Įndangered and Threatened Wildlife and Plants Final Rule To List Three Aquatic Invertebrates in Comal and Hays Counties, TX, as Endangered, 62 Fed. Natural history studies on the Comal Springs riffle beetle ( Heterelmis comalensis). Final Report prepared for Edwards Aquifer Authority. Comal Springs Riffle Beetle (Heterelmis comalensis): Life History and Captive Propagation Techniques. Year 1 Report prepared for Edwards Aquifer Authority. Evaluation of the Life History of the Comal Springs Riffle Beetle Egg. comalensis exist within a niche habitat of high quality, low temperature (26℃), streams, and rivers, approximately one meter from spring openings (Cooke 2012).ĭiet is thought to be comprised of bacterial biofilms of decomposing leaf- and wood-material, although the precise food source remains unknown (Nowlin et al. Spring regions of Comal and San Marcos Springs (BIO-WEST 2017). The complete life cycle of the Comal Springs riffle beetle is about two years (BIO-WEST 2017). Pupation occurs for about a month until adulthood. Following the last instar, larvae molt into pupae. comalensis typically carry 10 eggs with an incubation period of about 21-25 days and undergo seven instar larval stages during its life cycle. Since Comal Springs riffle beetles lack gills, they respire underwater via a plastron, a mass of setae on the underside that work to trap a thin layer of air and force the diffusion of dissolved oxygen from the surrounding water (Brown 1987). It is speculated the they move mainly by drifting downstream or crawling. comalensis are physically similar to other elmids (riffle beetles), however, they are unable to swim nor fly in all stages of its life, unlike other elmid (riffle beetle) species. Heterelmis comalensis Endangered Species Act statusĪdults are approximately 2 mm long (BIO-WEST 2016). ![]() Additionally, the implementation of EAHCP Conservation Measures, such as native riparian and aquatic habitat restoration, aid in the protection of these endangered species.Įxplore how the EAHCP helps protect the Comal Springs Riffle Beetle Common nameĬomal Springs riffle beetle Scientific name The Edwards Aquifer Habitat Conservation Plan (EAHCP) has sponsored several studies to improve the understanding on key aspects of the Comal Springs riffle beetle including their life cycle, physiological tolerances, diet, and critical habitat. ![]() The species is listed as an endangered species by the Endangered Species Act due to overconsumption of groundwater, low springflow and changes in water quality. comalensis) is a small aquatic beetle found exclusively in the Comal and San Marcos spring systems within the Edwards Aquifer region of Central Texas. Notice of Intent to Finish Out a Crop Calculator.Current Vendors Meter Accuracy Verification Testing.Voluntary Irrigation Suspension Program Option (VISPO).Transfer – Buying, Selling, and Leasing Water Rights.Guardians of the Aquifer: Meet the Beetles.Amazing Adaptations: Meet the Texas Blind Salamander.Springflow Habitat Protection Work Group.Stakeholder Committee Meeting Documents.Implementing Committee Meeting Documents.Agricultural Secondary Containment Assistance Program (AgSCAP).Aboveground / Underground Storage Tanks.Facility Registration, Storage, & Planning.Management of Regulated Substance Storage.Edwards Aquifer State Resource Concern (EASRC).Maps & Geographic Information Systems (GIS). ![]() Minority & Women Business Enterprise Program.Budgets and Annual Comprehensive Financial Report.
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