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33 results for “shallow subterranean habitats”
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 3. N in Niphargus diadematus sp. n. (Crustacea, Amphipoda, Niphargidae), an inhabitant of a shallow subterranean habitat in South Moravia (Czech Republic)
FIGURE 3. N. diadematus sp. n. A. gnathopods I; B. gnathopod II and its palmar section (B1); C. pereopod IV; D. coxal plates I-II (cxI, cxII); E. coxal plates III–IV (cxIII, cxIV); F–F3. pereopod V: F. general view, F1. coxal plate, F2. basis, F3. dactylus and nail; G–G3. pereopod VI: G. general view, G1. coxal plate, G2. basis, H3. dactylus and nail; H–H3. Pereopod VII: H. general view, H1. coxal plate, H2. basis, H3– H3a. dactylus and nail; I1. pleopod I; I2. pleopod II; J. uropod I; K. uropod II; L. polygonal reticulation on the cuticle. (Drawings by I. Hudec.)
FIGURE 4. N in Niphargus diadematus sp. n. (Crustacea, Amphipoda, Niphargidae), an inhabitant of a shallow subterranean habitat in South Moravia (Czech Republic)
FIGURE 4. N. diadematus sp. n. A. epimeral plates; B. ventral spine on epimeral plate II; C. pleopod retinacles of pleopod II; D. maxilla I (mx-1) and maxilla II (mx-2); E. maxilla I: inner lobe; F. mandibular and upper labium (ula); G. maxilliped: inner segment, outer segment and distal segment; H. gnathopods II; I. coxal plate V (female); J. pereopod V–distal part; K. coxal plate VII and basis; L–L1. telson (the same telson in different compression); M. telson and uropod of female. (Photo by I. Hudec.)
FIGURE 2 in Niphargus diadematus sp. n. (Crustacea, Amphipoda, Niphargidae), an inhabitant of a shallow subterranean habitat in South Moravia (Czech Republic)
FIGURE 2. Niphargus diadematus sp. n. A. male, general view; B. head capsula; C–C1 antenna; D. antenna; E. upper lip; F. ventral labium; G–G1. maxilla I; H–H1. maxilla II; I–I1. maxilliped (inner segment (is), outer segment (os)) and distal segment (I1); J. epimeral plates; K. telson; L. uropod III of female; M. uropod III of male; not scaled, except of the general view of the male. (Drawings and photo by I. Hudec.)
FIGURE 1 in Niphargus diadematus sp. n. (Crustacea, Amphipoda, Niphargidae), an inhabitant of a shallow subterranean habitat in South Moravia (Czech Republic)
FIGURE 1. Niphargus diadematus sp. n. A. The habitat of the type locality; B. The series of vertical subterranean traps used for this collection in soil.
Figure 3 in Temperature variation and the presence of troglobionts in terrestrial shallow subterranean habitats
Figure 3. Top panel, temperature profiles at hourly intervals for the La Guancha, 70 cm MSS site (black line) and Cueva del Mulo (grey line). Centre panel, spectral densities (y-axis) for different cycle periods (x-axis) for cycles up to 100 days for the MSS site. Note the absence of a 24 hour period even at very low spectral densities. Bottom panel, spectral densities (y-axis) for different cycle periods (x-axis) for cycles up to 100 days for the cave sites. Note the weak 24 hour period.
Figure 5 in Temperature variation and the presence of troglobionts in terrestrial shallow subterranean habitats
Figure 5. Top panel, temperature profiles at hourly intervals for an MSS (dark grey line), epikarst (black line) and cave (grey line) site in the doline where the entrance of Jama v Kovačiji is located. Upper centre panel, spectral densities (y-axis) for different cycle periods (x-axis) for cycles up to 100 days for the MSS site. Note the strong 24 hour period. Lower centre panel, spectral densities (y-axis) for different cycle periods (x-axis) for cycles up to 100 days for the epikarst site. Note the weak 24 hour period. Lower panel, spectral densities (y-axis) for different cycle periods (x-axis) for cycles up to 100 days for the cave site. Note the weak 24 hour period.
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