The Comal Springs riffle beetle Heterelmis comalensis Bosse, Tuff, and Brown is listed as endangered by the U.S. Fish and Wildlife Service. Rearing this species in captivity is important to maintaining a refuge which is a goal of the Edwards Aquifer Habitat Conservation Plan. Although captive larval production has been observed for years, the production of larvae per female has been relatively unknown. Production chambers were constructed from PVC to house one female and male and the production of larvae was monitored ca. monthly until the female died. Females were found to be iteroparous and produced 29.3 ± 37.1 larvae. The number of larvae produced was found to be a function of female longevity rather than size. Other aspects of captive production and observations from the study are discussed.

中文翻译：

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第一代圈养 Heterelmis comalensis（鞘翅目：榆科）的繁殖力。

Comal Springs 浅滩甲虫 Heterelmis comalensis Bosse、Tuff 和 Brown 被美国鱼类和野生动物管理局列为濒危物种。圈养这个物种对于维持避难所很重要，这是爱德华兹含水层栖息地保护计划的目标。尽管多年来一直观察到圈养幼虫的生产，但每只雌性幼虫的产量相对未知。生产室由 PVC 建造，以容纳一只雌性和一只雄性，并监测幼虫的生产。每月一次，直到雌性死亡。发现雌性是反复产的，并产生 29.3 ± 37.1 条幼虫。发现产生的幼虫数量是雌性寿命而不是大小的函数。讨论了圈养生产的其他方面和研究中的观察结果。