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Figure 5 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 5 Habitus of Chasmogenus spp. A–CC. acuminatus: A dorsal view B lateral view C ventral view. D–FC. pandus: D dorsal view E lateral view F ventral view. Scale bar: 2 mm.
Figure 4 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 4 Habitus of Chasmogenus spp. A–CC. lineatus: A dorsal view B lateral view C ventral view. D–FC. australis: D dorsal view E lateral view F ventral view. Scale bar: 2 mm.
Figure 3 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 3 Habitus of Chasmogenus spp. A–CC. flavomarginatus: A dorsal view B lateral view C ventral view. D–FC. bariorum: D dorsal view E lateral view F ventral view. G–IC. castaneusG dorsal view H lateral view I ventral view. Scale bar: 2 mm.
Figure 22 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 22 Habitat of Chasmogenus spp in Guyana. A Type locality and habitat for C. berbicensis, Guyana, margin/detrital sandbar of the upper Berbice River (collecting event GY14-0922-02A) B type locality and habitat for C. undulatus Guyana, near Ayanganna airstrip (collecting event GY14-0317-01A) C habitat for C. acuminatus and C. guianensis, Guyana, small tributary of the upper Berbice River (collecting event GY14-0924-01A) D habitat for C. acuminatus (collecting event GY13-1103-02A).
Figure 21 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 21 Habitat of Chasmogenus spp in Suriname. A Type locality and habitat for C. brownsbergensis, Brownsberg Nature Park (collecting event SR12-0804-03A) B type locality and habitat for C. ligulatus, near Mt. Kasikasima (collecting event SR12-0320-02A) C type locality and habitat for C. tafelbergensis, summit of Tafelberg tepui (collecting event SR13-0817-01A) D type locality and habitat for C. schmits, S of Kwamala along the Kutari River (collecting event SR10-0316-01B) E habitat for C. acuminatus, Central Suriname Nature Reserve, Raleighvallen (collecting event SR16-0316-01B) F habitat for C. guianensis, upper Palumeu River, (collecting event SR12-0311-01A).
Figure 2 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 2 Habitus of Chasmogenus amplius: A dorsal view B lateral view C ventral view. Scale bar: 2 mm.
Figure 20 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 20 Habitat of Chasmogenus spp. A Type locality and habitat for C. amplius and C. gato, Venezuela: Amazonas, Caño Gato (collecting event VZ09-0116-01X) B type locality and habitat for C. clavijoi, Venezuela: Guarico, San Nicolasito Field Station (collecting event VZ09-0110-02X) C–F habitat for C. australis: C Venezuela, Barinas, 13 km southeast of Ciudad Bolivia (collecting event VZ12-0125-02A) D Guyana, near Kusad Mountains (collecting event GY13-1027-01A). E, F Brazil, Roraima, near Caracarai, red circles showing live individuals of C. australis floating on the water surface (collecting event BR18-0116-05A).
Figure 18 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 18 Distribution of Chasmogenus spp. Localities marked with stars/triangles indicate populations that were sampled for DNA in Fig. 1.
Figure 9 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 9 Dorsal view of heads of Chasmogenus spp. AC. ampliusBC. acuminatusCC. berbicensisDC. clavijoiEC. undulatusFC. gato.
Figure 19 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 19 Habitat of Chasmogenus spp in the Andean region of Venezuela. A, B Type locality and habitat for C. bariorum, C. cuspifer, and C. castaneus, near El Tukuko, Rio Manantial collecting event VZ09-0129-01A) C habitat for C. bariorum and C. cuspifer, Henri Pittier National Park, Rio Cumboto (collecting event VZ09-0104-02B) D type locality and habitat for C. flavomarginatus, ca. 13 km NW of Baranitas (collecting event VZ12-0124-02B) E habitat for C. bariorum and C. lineatus, between San Juan and Dos Caminos, Rio San Antonio (collecting event VZ09-0108-02A) F habitat for C. bariorum and C. lineatus, near Arenales, Rio Salado (collecting event VZ09-0122-01X).
Figure 15 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 15 Aedeagi of Chasmogenus spp. A–DC. pandusA dorsal view (Suriname) B side view (Suriname) C specimen from French Guiana D specimen from Brazil EC. ligulatusFC. sinnamarensisGC. undulatusH, IC. acuminatusH specimen from Suriname I specimen from Guyana. Scale bars: 0.25 mm.
Figure 13 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 13 Aedeagi (dorsal view) of C. australisA holotype (Venezuela: Apure) B specimen from Guyana (Region 9) C specimen from Venezuela (Monagas) D specimen from Brazil (Roraima). Scale bar: 0.25 mm.
Figure 16 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 16 Aedeagi of Chasmogenus spp. A–DC. tafelbergensisA dorsal view B side view C side view D ventral view E–HC. ignotusE dorsal view F side view G side view H ventral view. Scale bar: 0.25 mm.
Figure 11 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 11 Aedeagi (dorsal view) AC. bariorum holotype (Venezuela: Zulia) BC. occidentalis holotype CC. yukparum holotype D–HC. bariorumD specimen from Zulia E specimen from Aragua F specimen from Falcón G specimen from Guárico H specimen from Trujillo. Scale bars: 0.25 mm.
Figure 10 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 10 Dorsal view of heads of Chasmogenus spp. from Suriname and Guyana AC. brownsbergensisBC. ligulatusCC. guianensisDC. pandus.
Figure 14 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 14 Aedeagi of (dorsal view) of Chasmogenus spp. AC. ampliusBC. clavijoiCC. gatoDC. berbicensisEC. brownsbergensisFC. schmitsG, HC. guianensisG specimen from Suriname H specimen from Guyana. Scale bar: 0.25 mm.
Figure 1 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 1 Maximum likelihood phylogeny of Chasmogenus spp. based on COI sequences. Ultra Fast Bootstrap (UFBS) values are indicated at nodes.
Figure 12 from: Smith RR, Short AEZ (2020) Review of the genus Chasmogenus Sharp, 1882 of northeastern South America with an emphasis on Venezuela, Suriname, and Guyana (Coleoptera, Hydrophilidae, Acidocerinae). ZooKeys 934: 25-79. https://doi.org/10.3897/zookeys.934.49359
Figure 12 Aedeagi (dorsal view) of Chasmogenus spp. AC. castaneusBC. flavomarginatusCC. flavomarginatusDC. cuspiferE–IC. lineatus. Scale bar: 0.25 mm.
Fig. 8. Helophorus auriculatus Sharp, 1884 in Morphology of immature stages of Helophorus (Gephelophorus) auriculatus (Coleoptera, Helophoridae)
Fig. 8. Helophorus auriculatus Sharp, 1884, sclerites on ventral prothoracic segment of third instar larva.
Feather mercury increases with feeding at higher trophic levels in two species of migrant raptors, Merlin (Falco columbarius) and Sharp-shinned Hawk (Accipiter striatus)
<p>Mercury (Hg) is a toxic heavy metal that, when methylated to form methylmercury (MeHg), bioaccumulates in exposed animals and biomagnifies through food webs. The purpose of this study was to assess Hg concentrations in raptors migrating through the upper Midwestern USA. From 2009-2012, 966 raptors of 11 species were captured at Hawk Ridge, Duluth, MN. Breast feathers were sampled to determine the concentration of total Hg. Mean Hg concentrations ranged from 0.11 – 3.46 μg g<sup>-1</sup> fresh weight across species and were generally higher in raptors that feed on birds in comparison with those that feed on mammals. To evaluate the effect of dietary sources on Hg biomagnification, carbon and nitrogen stable isotope ratios were measured in feathers of the two species with the highest Hg concentrations, Merlin (<i>Falco columbarius</i>) and Sharp-shinned Hawk (<i>Accipiter striatus</i>). Measured δ<sup>13</sup>C values were similar in both species and indicated a primarily terrestrial-derived diet, whereas δ<sup>15</sup>N values suggested that individual Merlin and Sharp-shinned Hawk feeding at higher trophic levels accumulated higher concentrations of Hg. The risk to birds associated with measured levels of feather Hg was evaluated by calculating blood-equivalent values using an established algorithm. Predicted blood values were then compared to heuristic risk categories synthesized across avian orders. This analysis suggested that while some Merlin and Sharp-shinned Hawk were at moderate risk to adverse effects of MeHg, most of the sampled birds were at negligible or low risk.</p>
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OpenNeuro
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