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Figure 16 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 16 Caleremaeus nasutusn. sp., transmitted-light micrographs of adult: A – end of posterior notogastral bulge, region of setal pair h1, dorsal view (insert = h1from another specimen, arrow to basal cerotegument nodule); B – posterolateral contour of notogaster, dorsal view; C – notogastral seta la, entire (above) and with isotropic outer layer removed leaving only birefringent core; D – posterior contour of notogaster, ventral view (left p1 and p2 lost, leaving only basal cerotegument nodule; insert = enlargedp1); E – coxisternum, ventral view (arrowhead on projection at end of discidial ridge); F – region above legs III-IV, lateral view (arrowhead as for F); G – preanal organ, optical section; H – region of aggenital enantiophysis. Scale bars: 10 µm (A-F, H); 5 µm (G).

Figure 15 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 15 Caleremaeus nasutusn. sp., transmitted-light micrographs of adult: A – prodorsum, dorsal view; B – anterior prodorsal lobe, different specimen; C – posterior prodorsum and sejugal region, dorsal view; D – bothridial seta; E – prodorsum, lateral view (gnathosoma removed); F – optical section of E, focused near midline; G – optical section of rostrum, anterior to top, dorsal view, focused on embossed figure on inner face of rostral bulge; H – same, different specimen, anterodorsal view of dissected fragment (rostrophragma broken on left). Scale bars: 20 µm (A-E); 10 µm (F-H).

Figure 13 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 13 Caleremaeus nasutusn. sp., adult: A – dorsal view (legs mostly omitted); B – ventral view (legs omitted). Scale bar: 50 µm.

Figure 12 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 12 Caleremaeus arboricolusn. sp., transmitted-light micrographs of juveniles: A – exuvial scalp of larva, with inserts (top to bottom) of enlarged setaeda, dp, lp, h1; B – protonymph, pygidial region, dorsal view; C – deutonymph, lateral view; D – same, dorsal view; E – tritonymph, pygidial region; F – exuvial scale attachments, lateral view, with sclerotized pocket in underside of larval scalp (kp) on top, detached and nested cornicle k of proto- and deutonymph from same specimen on bottom; G – protonymph, ventral view; H – partial coxisternum of deutonymph, ventral view, anterior to right (insert = trochanter III seta v஬); I – dorsodistal tubercle of tibia I of deutonymph (lower) and tritonymph (upper: partial, better showing barbs and velum of setad); J – deutonymph, dorsal view of partial prodorsum and leg I (insert: coupled seta d and solenidion of tibia II); K – femur I setabvம of deutonymph, intact (left) and with isotropic external layer separated from birefringent core (right). Scale bars: 20 µm (A-E, G); 10 µm (H-J); 2 µm (F, K).

Figure 11 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 11 Caleremaeus arboricolusn. sp., transmitted-light micrographs of adult: A – legs I-IV, abaxial view (trochanter II not shown); B – base of femur I, abaxial; C – same, ventral view (arrow to partial retrotectum); D – trochanter III, ventral view (arrow to partial retrotectum), with base of femur (twisted); E – tibia and tarsus I, adaxial view (lower left insert =ft″ and base of solenidionω1 of different specimen); F – solenidion φ of tibia II; G – proximodorsal part of two femora I, showing variants of femur I saccule (arrow to stigma); H – femur II and partial genu, abaxial view; I – femur III, abaxial view; J – aggenital region and abaxial view of femur IV; K – trochanter and base of femur IV, abaxial view. Scale bars: 20 µm (A); 10 µm (B-E); 5 µm (G-K); 2 µm (F).

Figure 10 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 10 Caleremaeus arboricolusn. sp., transmitted-light micrographs of adult: A – part of series of knots at margin of posterior notogastral bulge; B – detached notogastral cerotegument (optical cross-section); C – ventral plate cerotegument (face-on) near seta ag; D – coxisternum of male, surface focus (insert lower right = spermatopositor, arrowhead on largest alveolus); E – same, deeper focus; F – female with mostly extended ovipositor; G – distal part of ovipositor, showing ventral lobe (right) and one (of pair) dorsal lobe (left); H – coronal seta of ovipositor. Scale bars: 50 µm (F); 20 µm (D, E); 5 µm (A, B, G); 2 µm (C, H).

Figure 6 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 6 Caleremaeus retractus(Banks), juveniles: A – protonymph, dorsal view; B – deutonymph, lateral view, with smaller setae omitted from larval (SLa)and protonymphal (SPn) scalps. Dots indicate that seta is on exuvial scalp (one for larval, two for protonymphal). Scale bars: 50 µm (B); 10 µm (A).

Figure 4 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 4 Caleremaeus retractus(Banks), legs of adult (abaxial aspect, trochanter omitted from I, II): A – leg I; B – leg II; C – leg IV. Scale bar: 20 µm.

Figure 5 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 5 Caleremaeus retractus(Banks), transmitted-light micrographs of near-topotypical adults: A – legs I-IV, abaxial view (trochanters I, II not shown); B – trochanter and base of femur IV, mid-depth focus; C – same, deeper focus; D – partial leg III, with enlarged femoral seta d (upper left insert, arrow to basal cerotegument nodule) and tibial solenidionφ (upper right insert); E – left gena and rutellum, ventral view (removed from subcapitulum); F – chelicera, adaxial view; G – egg removed from oviduct. Scale bars: 20 µm (A, G); 10 µm (B-D, F); 5 µm (E).

Figure 8 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 8 Caleremaeus arboricolusn. sp., adult: A – dorsal view (legs mostly omitted); B – ventral view (legs omitted). Scale bar: 50 µm.

Figure 1 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 1 Caleremaeus retractus(Banks), adult: A – dorsal view (legs mostly omitted); B – lateral view (gnathosoma, legs and anal, genital plates omitted); C – subcapitulum, ventral view (adoral lips and palps omitted); D – palp, abaxial view. Scale bars: 50 µm (A, B); 10 µm (C, D).

Figure 2 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 2 Caleremaeus retractus(Banks), transmitted-light micrographs of near-topotypical adults: A – dorsolateral view; B – posterior view; C – cerotegument separated from notogaster, lateral view; D – same, dorsal view (face-on); E – bothridium and bothridial seta (head face-on); F – optical sections of bothridium; upper image focused fine circular striations of inner chamber, lower image on longitudinal striations of deepest part of inner chamber; G – anterior region of prodorsum, dorsal view (insert = enlargement of seta le, arrow to break in seta emphasizing surrounding cerotegument nodule); H – same, different specimen, showing cusp variation; I – anterior region of specimen in G, deeper focus showing rostral bulge and submarginal crest; J – prodorsum, dorsolateral view (gnathosoma removed; setaele and ro represented only by birefringent core); K – specimen in J, deeper focus on rostral bulge (arrowhead to transverse striae of embossed pattern on inner surface of rostral bulge; L – rostral region of dissected specimen, anterior view (black arrow to central ridge of embossed pattern on inner face of rostral bulge); M – parasagittal section of prodorsum and anterior hysterosoma (insert = enlarged base of rostral bulge and rostrophragma). Scale bars: 50 µm (A, B); 20 µm (J, M); 10 µm (E, G-I, K, L); 5 µm (C, D, F).

Figure 9 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 9 Caleremaeus arboricolusn. sp., transmitted-light micrographs of adult: A – anterior third, dorsal view; B – transverse ridge and setae le; C – same, different specimen; D – bothridium and setabs; E – posterolateral area of prodorsum, dorsal view; F – head of bothridial seta; G – prodorsum, lateral view; H – same, deep focus optical section (insert on left = enlarged base of rostral bulge and rostrophragma); I – middle third of body, lateral view; J – notogastral seta h2; K – notogastral seta lp; L – notogastral setae p1 and p3; M – posterior view (setae h1, p1 broken from alveolus). Scale bars: 20 µm (A, G-I, M); 10 µm (B, C); 5 µm (D-F, J-L).

Figure 7 in Two unusual new species of Caleremaeus (Acari: Oribatida) from eastern North America, with redescription of C. retractus and reevaluation of the genus

Figure 7 Caleremaeus retractus(Banks), transmitted-light micrographs of near-topotypical juveniles: A – protonymph, dorsal view (setae h1 incomplete); B – same, lateral view of posterior hysterosoma; C – deutonymph, lateral view of hysterosoma; D – tritonymph, dorsal view (insert = right lamellar seta and cusp); E – same, lateral view of hysterosoma; F – tritonymph, ventral view of prodorsal margin and partial gnathosoma (upper right insert = enlarged seta ro); G – gastronotic cornicle of tritonymph (scalps removed); H – bothridial seta of deutonymph; I – gastronotal seta lm from tritonymph (arrow to basal cerotegument nodule); J – same, but seta h2; K – same, but seta p2; L – dorsodistal process of tibia I, tritonymph, distal to left (φ1 rising out of focus; insert = opposite side of seta d, showing faint barbs); M – tibia, genu and distal part of femur I from tritonymph, adaxial view; N – coupled seta d and solenidion on tibia II (distal to left). Dots in B, C, E indicate that labeled seta (or its insertion) is on exuvial scalp of larva (.), protonymph (..) or deutonymph (…). Scale bars: 50 µm (D); 20 µm (A-C, E); 10 µm (M); 5 µm (F-H, L, N); 2 µm (I-K).

opencc-by-4.0Jun 2021View details →

North Atlantic Oscillation (NAO) climate index hidden in ocean generated secondary microseisms

<p>Datatsets associated with "North Atlantic Oscillation (NAO) climate index hidden in ocean generated secondary microseisms". The data include the daily seismic cross-correlograms for station pairs located on land and at the seafloor offshore Ireland, 3D models used for the numerical simulations and the associated synthetic seismic data.</p>

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Varying genetic imprints of roads and human density in North American mammal populations

<p>Road networks and human density are major factors contributing to habitat fragmentation and loss, isolation of wildlife populations and reduced genetic diversity. Terrestrial mammals are particularly sensitive to road networks and encroachment by human populations. However, there are limited assessments of the impacts of road networks and human density on population-specific nuclear genetic diversity, and it remains unclear how these impacts are modulated by life history traits. Using generalized linear mixed models and microsatellite data from 1444 North American terrestrial mammal populations we show that taxa with large home range sizes, dense populations, and large body sizes had reduced nuclear genetic diversity with increasing road impacts and human density, but the overall influence of life history traits was generally weak. Instead, we observed a high degree of genus-specific variation in genetic responses to road impacts and human density. Human density negatively affected allelic diversity or heterozygosity more than road networks (13 versus 5-7 of 25 assessed genera, respectively); increased road networks and human density also positively affected allelic diversity and heterozygosity in 15 and 6-9 genera, respectively. Large bodied, human-averse species were generally more negatively impacted than small, urban-adapted species. Genus-specific responses to habitat fragmentation by ongoing road development and human encroachment likely depend on the specific capability to (i) navigate roads as either barriers or movement corridors, and (ii) exploit resource-rich urban environments. The non-uniform genetic response to roads and human density highlights the need to implement efforts to mitigate the risk of vehicular collisions, while also facilitating gene flow between populations of particularly vulnerable taxa.</p>

opencc-zeroJun 2021View details →

Figs. 25-29. Hesperocranum rothi, new species. 25. Palp, prolateral view. 26. Palp, ventral view. 27. Palp, retrolateral view. 28. Epigynum, ventral view. 29 in On Hesperocranum, A New Spider Genus from Western North America (Araneae, Liocranidae)

Figs. 25-29. Hesperocranum rothi, new species. 25. Palp, prolateral view. 26. Palp, ventral view. 27. Palp, retrolateral view. 28. Epigynum, ventral view. 29. Epigynum, dorsal view.

Figs. 21-24 in On Hesperocranum, A New Spider Genus from Western North America (Araneae, Liocranidae)

Figs. 21-24. Hesperocranum rothi, new species, male palp. 21. Prolateral view. 22. Retrolateral view. 23. Prolateral view of embolar region. 24. Ventral view.

Figs. 17-20 in On Hesperocranum, A New Spider Genus from Western North America (Araneae, Liocranidae)

Figs. 17-20. Hesperocranum rothi, new species, female. 17. Chelicerae and eye region, anterior view. 18. Eye region, dorsal view. 19. Epigynum, ventral view. 20. Posterior median spinnerets, anterior end towards top of photo. Original magnification = 700 x.

Figs. 13-16. Clubionidae, leg I. 13, 14 in On Hesperocranum, A New Spider Genus from Western North America (Araneae, Liocranidae)

Figs. 13-16. Clubionidae, leg I. 13, 14. Clubiona canadensis Emerton, female, left tibia, lateral view. 15, 16. Cheiracanthium mildei L. Koch, female. 15. Right tibia, ventrolateral view. 16. Right tarsus, sublateral view.