AQUANIRMUS 



Aquanixmus Clay and Meinertzhagen, 1939a. Entomologist, 72: 163. 

 Type species: Degeeviella runcinata (Nitzsch, 1866). 



Moderately elongate Philopteridae, typically parasitic on grebes. 

 Darkly to moderately pigmented. Size of male 1.3-1.8 mm. Size of 

 female 2.1-2.6 mm. Pre- and post-marginal carina separate, ventral 

 carina heavily sclerotized, continuous with premarginal carina and ex- 

 tending posteriorly to anterior articulation of mandible. Clypeus 

 divided medially. Dorsal anterior plate pentagonal with narrow anterior 

 hyaline margin. Tergites divided medially except for terminal segments. 

 Sternites III-VI divided medially. Sternite VIII of female with 2 

 transverse rows of setae on posterior margin. Male genitalia relatively 

 simple, sjmimetrical , parameres not articulated and with relatively sim- 

 ple mesosome. 



Aquanirmus bucomfishi Edwards, 1965 



Aquanirmus bucomfishi Edwards, 1965. Canad. Ent., 97: 931, figs. 



1 , 2 , and 4 . 

 Type host: Podiceps auritus (Linnaeus) — Horned Grebe. 



A small species of Aquanirmus; male average 1.47 mm; female average 

 2.45 mm. Carinae of head, thorax and abdomen darkly pigmented. Tergites 

 with narrow bands giving the abdomen a banded appearance. The sclerotized 

 tube of the mesosome nearly twice as long as average (0.40 mm). This 

 species is confined to Podiceps auritus in North America, being replaced 

 by Aquanirmus colymbinus (Scopoli, 1763) on Podiceps auritus in Europe. 



Specimens Host Locality Date Collector 



3 ? Podiceps auritus Hampton, NH X-16-1965 B.Barrett 



Peters (1928) and (1936) reports this species from Ohio and 

 Illinois respectively; Brimly (1938) North Carolina; and Edwards (1965) 

 South Carolina, Mississippi, and California. 



Aquanirmus emersoni Edwards, 1965 



Aquanirmus emersoni Edwards, 1965. Canad. Ent., 97: 928, figs. 



2-4. 

 Type host: Podiceps grisegena (Boddaert) — Red-necked Grebe. 



A relatively large species of Aquanirmus; male average 1.69 mm, 

 female average 2.40 mm in length. Lateral lobes of male terminal ter- 

 gite may extend slightly beyond posterior sternal margin. Chaetotaxy 

 of sternite crowded posteriorly. Male genitalia large, 0.275 mm long, 

 0.159 mm wide. Female sternite VIII with 14 (13-15) setae in outer row, 

 13 (12-14) in inner row. 



The only records of Aquanirmus emersoni are by Edwards (1965) from 

 Massachusetts and Oregon. 



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