Aquatic Insects of Michigan by Ethan Bright, Museum of Zoology Insect Division and School of Natural Resources and Environment |
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Haliplidae (Crawling Water Beetles) of MichiganIntroductionThese are small (<5 mm length) water beetles characterized in the adult form by expanded coxal plates that function as an extension to store air under the elytra (plastron respiration). Although adults have modified tarsi and tibiae for swimming, they are characterized as cumbersome swimmers and are often found clambering on vegetation. Though mostly algivores, the diet of both larva and adult stages is facultatively omnivorous. Eggs are laid on algal food sources, and the three larval stages occur in water. Pupation occurs adjacent to aquatic habitats, with adults emerging to disperse into aquatic habitats. Useful summaries of haliplid biology are given by Matheson (1912), Hickman (1929, 1930) and Roughley (2000). Of the approximately 220 described species in all major zoogeographic regions (Nilsson & van Vondel 2005), 20 species in 3 genera have been documented from Michigan, with another 7 occurring nearby based on regional records. Species of Haliplus occur most frequently in ponds and lake margins, and sometimes along slow-moving stream margins, and those of Peltodytes more frequently along stream edges and vegetated banks. The habitat of the endangered species Brychius hungerfordi, known only from a handful of scattered populations in Michigan and Ontario, is restricted to shallow erosional zones of coldwater streams (Strand and Spangler 1994, Mousseau and Rougley 2007). A species identified as Haliplus ruficollis (DeGeer, 1774: 404) from Michigan in the UMMZ collection is probably a misidentification, as this is a Palaearctic species. Genera are donoted in bold green; species denoted in bold blue have been recorded in Michigan; other species denoted in bold are likely to occur based on their known distribution. You can use the Find function in your web browser to locate families, genera, and species. Synonomous species (indented) are listed below the current valid species (denoted in bold) with its taxonomic status indicated. Haliplidae Aubé, 1836: 14
Haliplus (Haliplus) blanchardi Roberts, 1913: 108 - UMMZ Haliplus (Paraliaphlus) borealis LeConte, 1850: 212 - NMNH (web page database) Haliplus (Liaphlus) canadensis Wallis, 1933: 51 - UMMZ Haliplus (Liaphlus) connexus Matheson, 1912: 164 - UMMZ Haliplus (Liaphlus) cribrarius LeConte, 1850: 212 - Hickman 1929: 414-418; Downie and Arnett 1996 Haliplus (Paraliaphlus) fasciatus Aubé, 1838: 30 - Downie and Arnett 1996 Haliplus (Liaphlus) fulvus (Fabricius, 1801: 271 as Dytiscus) - UMMZ, record at Albertson College of Idaho Collection (as H. subguttatus), ON, BC-MA/NS, widespread north (Roughley 1991)
(syn.) Haliplus fulvus var. carlittensis Régimbart, 1901: 323 (syn.) Haliplus lapponum Thomson, 1856: 184 (syn.) Haliplus lapponum var. niger Seidlitz, 1887: 31 (syn.) Haliplus pyraeneus Delarouzée, 1857: 95 (syn.) Haliplus subguttatus Roberts, 1913: 100 (syn.) Haliplus salinarius Wallis, 1933: 556 (syn.) Haliplus sparreschneideri Munster, 1922: 15 (syn.) Haliplus unicolor Fiori, 1914: 188 (syn.) Haliplus fulvus var. unicolor Munster, 1922:14
(syn.) Haliplus pallidus Roberts, 1913: 109 (syn.) Haliplus robertsi Zimmermann, 1924: 73 Haliplus (Haliplus) longulus LeConte, 1850: 211 - UMMZ
Haliplus (Paraliaphlus) ohioensis Wallis, 1933: 27 - IL, IN, OH Haliplus (Paraliaphlus) pantherinus Aubé, 1838: 29 - Downie and Arnett 1996 Haliplus (Paraliaphlus) tortilipenis Brigham and Sanderson, 1972: 18 - IL (Cook Co.), MN, WI Haliplus (Paraliaphlus) triopsis Say, 1823: 106 - Hickman 1929: 418-421; UMMZ Haliplus (Paraliaphlus) variomaculatus Brigham and Sanderson, 1973: 157 - IL (Vermillion Co.), may be found in sw. LP
Peltodytes (Neopeltodytes) duodecimpunctatus (Say, 1823: 106 as Haliplus) - Vondel 2015 Peltodytes (Neopeltodytes) lengi Roberts, 1913: 119 - Hickman 1929: 400-407; Downie and Arnett 1996 Peltodytes (Neopeltodytes) muticus (LeConte, 1863: 21 as Cnemidotus) - UMMZ Peltodytes (Neopeltodytes) pedunculatus (Blatchley, 1910: 204 as Cnemidotus) - Downie and Arnett 1996 - NMNH (web page database) Peltodytes (Neopeltodytes) sexmaculatus Roberts, 1913: 117 - Hickman 1929: 407-408; Downie and Arnett 1996 Peltodytes (Neopeltodytes) tortulosus Roberts, 1913: 118 - Downie and Arnett 1996
References - Taxonomic and Distribution
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