Table 2.
Species of Hydradephaga (Dytiscidae, Gyrinidae, Haliplidae) collected in Cape Breton Island, Nova Scotia, Canada in 2006 and 2007 with sample numbers (as in Table 1), absolute (AF) and relative frequencies (%), and relative frequency of occurrence (RFO). Species in bold denote new records from Nova Scotia given in the present account.
| Taxon | Sample numbers | AF (%) | RFO |
|---|---|---|---|
| Haliplidae | |||
| Haliplus canadensis Wallis | C25, I78, I88 | 5 (0.25) | 3.19 |
| Haliplus connexus Matheson | I79, I80, I93 | 4 (0.20) | 3.19 |
| Haliplus cribarius LeConte | R62, I79 | 3 (0.15) | 2.13 |
| Haliplus fulvus (Fabricius) | R45, C42, I78, I79, I90 | 11 (0.54) | 5.32 |
| Haliplus immaculicollis Harris | V05, V11, V13, C25, V28, R37, R42, R44, C49, C58, R62, I69, I76, I77, I78, I79, I80, V84, I86, I87, I88, I90, I91, I92, I93 | 112 (5.53) | 26.60 |
| Haliplus longulus LeConte | R45, I71 | 2 (0.10) | 2.13 |
| Peltodytes edentulus (LeConte) | I91, I93 | 28 (1.38) | 2.13 |
| Dytiscidae | |||
| Acilius mediatus (Say) | V09, I83, I87 | 5 (0.25) | 3.19 |
| Acilius semisulcatus Aubé | V04, R34, R39, I67, I92 | 7 (0.35) | 5.32 |
| Agabus ambiguuus (Say) | V04, V09, V10, C25, V26, V28, C20, C49, I67, I76, I79, I80, I82, I83, V84, I90 | 76 (3.75) | 17.02 |
| Agabus anthracinus Mannerheim | V03, C21, C22, C24, V26, V28, R29, R40, R46, R47, C49, C57, C59, C61, R63, R65, I67, I69, I76, I80 | 95 (4.69) | 21.28 |
| Agabus erythropterus (Say) | V09, C25, R46, R48, I76, I77, I78, I79, I86; I90 | 76 (3.75) | 10.64 |
| Agabus leptapsis (LeConte) | V12, I75, I76, I79, I80 | 5 (0.25) | 5.32 |
| Agabus phaeopterus (Kirby) | V27 | 1 (0.05) | 1.06 |
| Agabus semipunctatus (Kirby) | V03, C16, C24, V27, R46, C59 | 6 (0.30) | 6.38 |
| Agabus subfuscatus Sharp | R29, R44, C61, R65, I66 | 13 (0.64) | 5.32 |
| Clemnius laccophilinus (LeConte) | I92 | 1 (0.05) | 1.06 |
| Colymbetes paykulli Erichson | V03, C61 | 2 (0.10) | 2.13 |
| Colymbetes sculptilis Harris | I76, I80 | 2 (0.10) | 2.13 |
| Copelatus glyphicus (Say) | V03, V04, V07, V27, C17, C18, C19, C24, R31, R44 | 64 (3.16) | 10.64 |
| Coptotomus longulus LeConte | C21, R33 | 2 (0.10) | 2.13 |
| Desmopachria convexa (Aubé) | C21, C24, R40, R45, R46, C57, C58, C59, I69, I70, I71, I94 | 70 (3.45) | 12.77 |
| Dytiscus fasciventris Say | V84, I88, I92 | 4 (0.20) | 3.19 |
| Dytiscus verticalis Say | R46, I69 | 2 (0.10) | 2.13 |
| Heterosternuta allegheniana (Matta & Wolfe) | R31, R32, R64, I72 | 39 (1.92) | 4.26 |
| Heterosternuta pulchra (LeConte) | R32, I73, V85, I88, I89 | 28 (1.38) | 5.32 |
| Heterosternuta wickhami (Zaitzev) | I78, I79, V85 | 9 (0.44) | 3.19 |
| Hydaticus aruspex Clark | C24, V26, C51, R65, I67, I70, I71, I94 | 9 (0.44) | 8.51 |
| Hydrocolus paugus (Fall) | V03, C17, V27, R40, I67, I75, I80, V84 | 12 (0.59) | 8.51 |
| Hydrocolus stagnalis (G. & H.) | V08, C18, C19, R46, C50, I90 | 7 (0.35) | 6.38 |
| Hydroporus appalachius Sherman | I79, I86 | 33 (1.63) | 2.13 |
| Hydroporus badiellus Fall | R40, C57, I70 | 13 (0.64) | 3.19 |
| Hydroporus dentellus Fall | V09, V28, R40, R45, R46, R47, R65, I92, I93 | 24 (1.18) | 9.58 |
| Hydroporus gossei Larson & Roughley | V12, V26, V27, C53, C59, I88, I90 | 11 (0.54) | 7.45 |
| Hydroporus nigellus Mannerheim | C21, V28 | 2 (0.10) | 2.13 |
| Hydroporus niger Say | C49, C59, I67, I88 | 7 (0.35) | 4.26 |
| Hydroporus notabilis LeConte | V04, C18, C21, C24, V26, V27, V28, R42, C49, C61, I69, I76, I78, I80, I81, I83, V84, I87, I88, I90, I93, I94 | 52 (2.57) | 23.40 |
| Hydroporus obscurus Sturm | I70 | 1 (0.05) | 1.06 |
| Hydroporus puberulus LeConte | C53, I71 | 9 (0.44) | 2.13 |
| Hydroporus rufinasus Mannerheim | R29, R45, R65 | 4 (0.20) | 3.19 |
| Hydroporus signatus Mannerheim | V07, V10, C18, C17, C21, C24, V28, R29, R42, R46, R47, C49, C59, C61 | 34 (1.68) | 14.89 |
| Hydroporus striola (Gyllenhal) | V03, V07, V26, V28, C20, R30, R32, R36, R38, R45, R46, C49, C53, C59, C61, I80, I83, V84, I88, I90 | 56 (2.76) | 21.28 |
| Hydroporus tenebrosus LeConte | C18, C53, I93 | 4 (0.20) | 3.19 |
| Hydroporus tristis (Paykull) | V07, V09, V14, C17, C18, C21, C24, V27, C50, C53, C59, C61, I77, I80, I83 | 44 (2.17) | 15.96 |
| Hygrotus impressopunctatus (Schaller) | R35 | 1 (0.05) | 1.06 |
| Hygrotus picatus (Kirby) | V04, C20, R46, R47, I76, I94 | 8 (0.40) | 6.38 |
| Hygrotus sayi Balfour-Browne | V14, C25, V26, V28, R45, R47, C58, I80, I87, I88, I94 | 25 (1.23) | 11.70 |
| Hygrotus turbidus (LeConte) | R39; I66 | 11 (0.54) | 2.13 |
| Ilybiosoma seriatum (Say) | C02, V05, V08, C19, C23, C25, R31, C50, C52, C54, C60, R64, I67, I68, I74, I75, V85 | 76 (3.75) | 18.09 |
| Ilybius angustior (Gyllenhal) | R39, R46, I83, | 6 (0.30) | 3.19 |
| Ilybius biguttulus (Germar) | V03, V04, C21, C24, V28, R34, C49, C59, R64, I75, I76, I77, I80, I87, I88, I90, I92, I93, I94 | 106 (5.23) | 20.21 |
| Ilybius confusus Aubé | I80 | 1 (0.05) | 1.06 |
| Ilybius discedens Sharp | V27, R29, R46, C49, C57, I71, I92 | 11 (0.54) | 7.45 |
| Ilybius erichsoni G. & H. | V07, C53 | 7 (0.35) | 2.13 |
| Ilybius ignarus (LeConte) | V03, C21, V27 R45 | 6 (0.30) | 4.26 |
| Ilybius larsoni (Fery & Nilsson) | V04, V06, V09, C18, C21, V27, R40, R48, C50, C61, I74 | 22 (1.09) | 11.7 |
| Ilybius picipes (Kirby) | V26, I76 | 6 (0.30) | 2.13 |
| Ilybius pleuriticus (LeConte) | C56, C59, I76, I87, I92 | 15 (0.74) | 5.32 |
| Ilybius wasastjernae (C.R. Sahlberg) | V27 | 1 (0.05) | 1.06 |
| Laccophilus m. maculosus Say | V13, C20, C22, C24, V28, R33, R34, R35, R42, C49, I66, I69, I80, I87 | 32 (1.58) | 14.89 |
| Laccornis latens (Fall) | R29 | 6 (0.29) | 1.06 |
| Liodessus affinis (Say) | V04, V26, V28, R34, R35, R42, C49, C59, R62, I90, I93 | 55 (2.71) | 11.70 |
| Meridiorhantus sinuatus (LeConte) | R38, C52 | 3 (0.15) | 2.13 |
| Nebrioporus rotundatus (LeConte) | C25, R32, I73, I88 | 35 (1.73) | 4.26 |
| Neoporus carolinus (Fall) | V09, V12, V13, V15, V28, R40, R41, C49, C50, C52, C55, C57, I68, I75, I76, I77, I78, I79, I80, I86, I88 | 97 (4.79) | 22.34 |
| Neoporus clypealis (Sharp) | R32, R62, I80, I88, I93 | 14 (0.69) | 5.32 |
| Neoporus dimidiatus (G. & H.) | V28, I77, I78, I79, V84, I86, I88, I90, I91 | 44 (2.17) | 9.58 |
| Neoporus spurius (LeConte) | I80, V85, I91 | 15 (0.74) | 3.19 |
| Neoporus sulcipennis (Fall) | R64, 172, I80, I88, I89 | 28 (1.38) | 5.32 |
| Neoporus undulatus (Fall) | C25, V28, R35, R43, R45, R47, I80, I87, I90, I92, I93 | 84 (4.14) | 11.70 |
| Oreodytess. scitulus (LeConte) | I72, I73 | 8 (0.40) | 2.13 |
| Platambus obtusatus (Say) | V26, R38, R40, C50, C61, R64, I83 | 9 (0.44) | 7.45 |
| Rhantus binotatus (Harris) | V04, V07, V26, R34, I67, I80, I83, V84, I94 | 15 (0.74) | 9.58 |
| Rhantus suturellus (Harris) | V28, R46, R65 | 4 (0.20) | 3.19 |
| Rhantus wallisi (Harris) | C24, R45, C59, C56, I66 | 11 (0.54) | 5.32 |
| Gyrinidae | |||
| Dineutus hornii Roberts | CO1, R35, I93 | 17 (0.84) | 3.19 |
| Dineutus nigrior Roberts | R34, R35, C56 | 6 (0.30) | 3.19 |
| Gyrinus affinis Aubé | R40, C53, C56, I76, | 32 (1.58) | 4.26 |
| Gyrinus aquiris LeConte | C01, R45, R46; I90 | 9 (0.44) | 4.26 |
| Gyrinus confinis Fall | R45 | 1 (0.05) | 1.06 |
| Gyrinus fraternus Couper | R45; R62 | 16 (0.79) | 2.13 |
| Gyrinus gehringi Chamberlain | V07, V13, R46, C53, I66, I76, V84, V85 | 48 (2.37) | 8.51 |
| Gyrinus latilimbus Fall | V13, R45, C56, R62, I66, I76, I79 | 44 (2.17) | 7.45 |
| Gyrinus pugionis Fall | C01, V14, R45, I92, I93 | 69 (3.40) | 5.32 |
| Gyrinus sayi Aubé | V13, C21, R34, R35, R40, R45, R46, R47, C53, R62, I67, I76 | 29 (1.43) | 12.77 |
| Total | 2027 | ||