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123 results for “Crangonyctidae”
FIGURE 13 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 13. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a, b, c, d, e), pereopods 3, 4 (in part), 5, 6, 7 (in part). Note: pereopods 6 and 7 subequal except coxal plates differ as shown. Coxal gills shown on pereopods 3 and 4. All pereopods and basic gnathopods to same scale.
FIGURE 8 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 8. Stygobromus paxillus, sp. n. Prettyboy Dam West Spring, Baltimore Co., Maryland. Paratype female (3.0–3.5 mm): (a, b), antennae 1, 2 (accessory flagellum of antennae 1 enlarged); (c) right mandible (spine row, lacinia mobilis and incisor enlarged); (d) left mandible; (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped.All mouthparts drawn to same scale; antennae to smaller scale.
FIGURE 9 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 9. Stygobromus paxillus, sp. n. Pretty Boy Dam West Spring, Baltimore Co., Maryland.Paratype female (3.0–3.5 mm): (a) gnathopod 1 (palmar spine enlarged); (b) gnathopod 2 (palm and palmar spines enlarged in part). Gnathopods drawn to same scale.
FIGURE 5 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 5. Stygobromus felleri, sp. n. Funks Pond Spring, Cecil County, Maryland. Paratype male (4.0–4.5 mm): (a, b) antenna 1, antenna 2 (accessory flagellum and aesthetacs of antenna 1 enlarged); (c) left mandible (inner face enlarged); (d) right mandible in part (inner face enlarged); (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped. Antennae drawn to same scale; maxillae 1 & 2 to same scale; maxilliped and lower lip to smaller scale.
FIGURE 4 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 4. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) bifurcate lateral sternal gill (process); (g) pleonal plates 1, 2, 3; (h) pleopod; (i, j, k.) uropods 1, 2, 3; (l) telson. Pereopods, pleonal plates and bifurcate lateral gill drawn to same scale; all other structures (uropods, pleopod & telson) to larger scale.
FIGURE 1 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 1. Distribution of four new species of Stygobromus from the Coastal Plain and eastern Piedmont in Maryland and Virginia, United States. The restricted distributions of S. caecilius, S. felleri and S. paxillus. are indicated by single symbols. Stygobromus foliatus is more widely distributed and recorded from multiple locations on opposite sides of the Potomac River in Charles and S. Mary's counties in Maryland, and Caroline, Westmoreland and King & Queen counties in Virginia. Several closely spaced localities in Caroline County are indicated by a single symbol. The curved line through MD and VA marks the approximate boundary between the Coastal Plain to the east and the Piedmont to the west.
FIGURE 7 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 7. Stygobromus felleri, sp. n. Funks Pond Spring, Cecil County, Maryland. Paratype male (4.0–4.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) lateral sternal gill from pereopod 7; (g) lateral sternal gill from pereopod 6; (h) pleonal plates; (i) pleopod; (j, k, l) uropods 1, 2, 3; (m) telson. Antennae, pereopods 3, 4, 5, 6, 7 and pleonal plates drawn to same scale; gnathopods 1 & 2, pleopod, uropods and telson to larger scale.Maxillae 1 & 2 drawn to larger scale than other mouthparts. Inner faces of molars and palms of gnathopods greatly enlarged.
FIGURE 12 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 12. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a) gnathopod 1 (palmar region and rastellate setae greatly enlarged; (b) gnathopod 2 (propodus and rastellate setae greatly enlarged). Basic gnathopods drawn to same scale. Enlargements: gnathopod 1 (4X); gnathopod 2 (2X).
FIGURE 11 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 11. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co., Virginia. Paratype female (8.0 mm): (a, b) antennae 1, 2 (aesthetacs on antenna 2 enlarged as indicated); (c) right mandible in part (palp not drawn, similar to left mandible); (d), left mandible; (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped. All mouthparts drawn to same scale; antennae to smaller scale.
FIGURE 10 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 10. Stygobromus paxillus, sp. n. Pretty Boy Dam West Spring, Baltimore Co., Maryland.Paratype female (3.0–3.5 mm): (a, b, c, d, e) pereopods 3, 4, 5, 6, 7; (f) median sternal gills (processes); (g) pleonal plate; (h, i, j) uropods 1, 2, 3; (k) telson. All pereopods, pleonal plate, uropods 1 & 2 drawn to same scale; uropod 3 and telson to larger scale.
FIGURE 3 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 3. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm: (a) gnathopod 1; (b) gnathopod 2.
FIGURE 2 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 2. Stygobromus caecilius, sp. n. Belvedere Seepage Woods, Cecil County, Maryland. Holotype specimen (2.0–2.5 mm): (a, b) antenna 1, antenna 2; (c) right mandible; (d) left mandible; (e) lower lip; (f) maxilla 1; (g) maxilliped; (h). Antennae drawn to same scale; other mouthparts to larger scale. Inner face of mandibles enlarged as indicated.
FIGURE 14 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 14. Stygobromus foliatus, sp. n. Seep in Pettigrew Wildlife Management Area, 0.5 km SE of Skinkers Corner, Caroline Co..Virginia. Paratype female (8.0 mm): (a) leaf-like sternal gills (processes); (b) brood plate; (c) pleonal plates (left to right) 1, 2, 3; (d) uropod 1; (e) uropod 2; (f) uropod 3; (g) telson. Brood plates, sternal gills, uropods 1 and 2 drawn to same scale; uropod 3 and telson to larger scale. Pleonal plates greatly reduced and drawn to much smaller scale than other structures.
FIGURE 6 in Four new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from shallow groundwater habitats on the Coastal Plain and eastern margin of the Piedmont in Maryland and Virginia, USA
FIGURE 6. Stygobromus felleri, sp. n. Funks Pond Spring, Cecil County, Maryland.Paratype male (4.0–4.5 mm): (a, b) gnathopods 1, 2 (palmar margins enlarged). Gnathopods drawn to larger scale than antennae.
FIGURE 5 in A new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from two caves and a spring in western Maryland, USA with additional records of undescribed species from groundwater habitats in central Maryland
FIGURE 5. Stygobromus amicus, sp. n. John Friend Cave, Garrett County, Maryland. Paratype specimen (2.0–2.5 mm): (a) pleonal plates 1, 2, 3; (b) pleonite 1; (c) uropod 1; (d) uropod 2; (e) uropod 3; (f) telson. Uropods, pleonites and telson drawn to same scale; pleonal plates drawn to smaller scale.
FIGURE 3 in A new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from two caves and a spring in western Maryland, USA with additional records of undescribed species from groundwater habitats in central Maryland
FIGURE 3. Stygobromus amicus, sp. n. John Friend Cave, Garrett County, Maryland. Paratype specimen (2.0–2.5 mm): (a) gnathopod 1 (palmar region enlarged; (b) gnathopod 2 (palmar region enlarged). Gnathopods drawn to same scale.
FIGURE 2 in A new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from two caves and a spring in western Maryland, USA with additional records of undescribed species from groundwater habitats in central Maryland
FIGURE 2. Stygobromus amicus, sp. n. John Friend Cave, Garrett County, Maryland. Paratype specimen (2.0–2.5 mm): (a, b) antenna 1,antenna 2; (c) right mandible; (d) left mandible in part; (e) lower lip; (f) maxilla 1; (g) maxilla 2; (h) maxilliped. All mouthparts drawn to same scale; antennae drawn to smaller scale.
FIGURE 4 in A new species of the subterranean amphipod genus Stygobromus (Amphipoda: Crangonyctidae) from two caves and a spring in western Maryland, USA with additional records of undescribed species from groundwater habitats in central Maryland
FIGURE 4. Stygobromus amicus, sp. n. John Friend Cave, Garrett County, Maryland. Paratype specimen (2.0–2.5 mm): (a) pereopod 3; (b) pereopod 4; (c) pereopod 5; (d) pereopd 6; (e) pereopod 7. Pereopods drawn to same scale.
FIGURE 5 in A new species of the subterranean genus Stygobromus (Amphipoda: Crangonyctidae) from a cave spring in northern Florida, USA
FIGURE 5. Stygobromus floridanus, sp. Skippers Spring, Washington County, Florida. Paratype specimen (13 mm): (a) pleonal plates; (b) uropod 1 and 2; (c) uropod 3; (d) telson. (pleonites not shown).
FIGURE 3 in A new species of the subterranean genus Stygobromus (Amphipoda: Crangonyctidae) from a cave spring in northern Florida, USA
FIGURE 3. Stygobromus floridanus, sp. n. Skippers Spring, Washington County, Florida. Paratype specimen (13 mm): (a) gnathopod 1; (b) gnathopod 2.
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