14,697 research outputs found
Djeboa obovata Cook 1966
No full textDjeboa obovata (Cook, 1966) (Figs. 31 A–F) Mideopsis (Djeboa) obovata Cook 1966: 240. Material examined: Type series: FMC, Liberia; holotype female, Congo Town area, water filled ditch, 30.vii. 1958 Cook (Coll. 105); paratype male, same data as holotype. General features: Idiosoma tapering posteriorly, obovoid in shape (L/W ratio 1.1–1.2), dorsal shield without medial depression; muscle scars with weakly pronounced thickenings, located anterior and posterior to the postocularia; colour pattern unknown; gnathosomal bay Y-shaped, narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV not reduced to a median angle; Cx-III and -IV with a few longitudinal striae (two or three pairs on Cx-IV) Palp (Fig. 31 D): P- 1 without a dorsal seta; P- 2 with slightly concave ventral and convexly bowed dorsal margin; P- 3 ventral margin slightly concave; P- 4 equally narrowing from the base to distal edge. Legs: I-L (Fig. 31 E) with I-L- 6 dL/H ratio 3.2; IV-L: Fig. 31 F. Discussion: Differing from all known species of the genus in the obovate idiosoma shape. Distribution: Liberia (Cook 1966).Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 53, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa expansipalpis Cook 1966
No full textDjeboa expansipalpis (Cook, 1966) (Figs. 19 A–F, 37 F) Mideopsis (Djeboa) expansipalpis Cook 1966: 232. Material examined: Type series: FMC, Liberia; holotype female, Bomi Hills Road, stream at bridge 132, 31.i. 1958, Cook (Coll. 93); paratypes: same data as holotype, 2 / 2 /0; Coll. 50, 0/ 1 /0; Coll. 74, 0/ 1 /0; Coll. 86, 0/ 1 /0; Coll. 88 0/ 1 /0; Coll.92, 1/ 2 /0; Coll. 95, 1/0/0 (for details see Cook 1966). New records: Côte d’Ivoire, River N’zi near Tinbé, (T) drift day, 11.vii. 1977 Statzner 0/ 1 /0 (mounted). General features: Dorsal shield oval (L/W ratio 1.1–1.2), with medial depression; muscle scars anterior and posterior to postocularia with well pronounced thickenings; second pair of muscle scars extending to the edge of dorsal depression (Fig. 37 F); central portion of dorsal shield purple; gnathosomal bay V-shaped; tips of Cx-I ending slightly posterior to frontal margin; medial margins of Cx-IV reduced to a median angle and well separated from each other; posterior margin of Cx-IV extending posterolaterally. Palp (Fig. 19 D): P- 1 with a dorsal seta; P- 2 strongly inflated, with straight ventral and convexly bowed dorsal margin; P- 3 much higher proximally than ventrally, ventral margin slightly concave, dorsal margin strongly convex; P- 4 slender, basally thickened, from here to anterior tip equally narrowed. Legs: I-L (Fig. 19 E) with I-L- 6 L/H ratio 2.0, ventral margin distally convexly protruding; IV-L: Fig. 19 F. Discussion: The present species is similar to Djeboa compressa K. Viets, 1914 in shape of idiosoma and palp (P- 1 with dorsal seta, P- 4 slender, much longer than high) but differs in dorsal muscle scars, more pronounced and purple rather than blue, central portion of dorsal shield, the medial margins of Cx-IV more distanced from each other, and P- 3 even more expanded and lacking the characteristic dorsal indentation. Distribution: Liberia; first record from Côte d’Ivoire.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 35, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa bomiensis Cook 1966
No full textDjeboa bomiensis (Cook, 1966) (Figs. 10 A–F) Mideopsis (Djeboa) bomiensis Cook 1966: 239. Material examined: Type series: FMC, Liberia; holotype female, Suehn road, approximately four miles north of Bomi Hills Road, 30.xi. 1957 Cook (Coll. 84); paratypes: same site and date as holotype 3 / 3 /0; Coll. 36, 1/0/0; Coll. 41, 1/0/0; Coll. 76, 0/ 1 /0; Coll. 83, 3/ 1 /0; Coll. 88, 1/ 4 /0; Coll. 89, 0/ 2 /0; Coll. 91, 0/ 1 /0; Coll. 93,3/ 2 /0; Coll. 94, 2/ 3 /0; Coll. 95, 1/ 2 /0; Coll. 96, 1/ 2 /0 (see Cook 1966 for more details). General features: Dorsal shield oval (L/W ratio 1.1–1.2), with medial depression (Fig. 10 A); muscle scars with slightly pronounced thickenings, located anterior and posterior to the postocularia; dorsal shield blue in colour except periphery; gnathosomal bay of a modified Y-shape, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a median angle; Cx-III and -IV with a few longitudinal striae (two pairs on Cx-IV). Palp (Fig. 10 D): P- 1 without a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 maximum height proximally, ventral margin concave; P- 4 equally narrowing from the base to tip. Legs: I-L (Fig. 10 E) with I-L- 6 L/H ratio 2.6; IV-L: Fig. 10 F. Discussion: In shape and setation of palp (with P- 1 lacking seta), Djeboa bomiensis is similar to D. rotundata K. Viets, 1914. The latter differs most noticeably in the rounded shape of the idiosoma, and also in a more slender P- 3 and P- 4 (Cook 1966). A re-examination of type material shows that the statement of Cook (1966) that swimming hairs are absent in D. bomiensis (followed later in the key of K.O.Viets 1970) is erroneous. Distribution: Liberia, widely distributed and numerous.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 22, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa liberiensis Cook 1966
No full textDjeboa liberiensis (Cook, 1966) (Figs. 25 A–F) Mideopsis (Djeboa) liberiensis Cook, 1966: 234. Material examined: Type series: FMC, Liberia; holotype female, Bomi Hills road, stream at bridge 19, 8.xii. 1957, Cook (Coll. 85); paratypes: same date and site, 3 / 1 /0; same site, 6.i. 1957 (Coll. 27), 3 / 9 /0; same site, 23.i. 1957 (Coll. 36), 7 / 7 /0; Coll. 40, 1/0(0; Coll. 41, 8/ 8 /0; Coll. 42, 9/ 23 /0; Coll. 50, 0/ 3 /0; Coll. 51, 1/0/0; Coll. 74, 1/0/0; Coll. 76, 1/ 9 /0; Coll. 83, 0/ 2 /0; Coll. 84, 1/ 2 /0; Coll. 87, 2/ 2 /0; Coll. 88, 6/ 3 /0; Coll. 91, 6/ 5 /0; Coll. 92, 4/ 3 /0; Coll. 93, 1/ 13 /0; Coll. 94, 4/ 3 /0; Coll. 95, 1/0/0; Coll. 96, 1/ 2 /0; Coll. 98, 0/ 1 /0 (for details see Cook 1966). General features: Dorsal shield almost perfectly circular (L/W ratio 1.0), with extended medial depression occupying most of the shield (Fig. 25 A); muscle scars located anterior and posterior to the postocularia, with moderately pronounced thickenings; anterior and central portion of dorsal shield blue; edges of ventral shield with large serrations; gnathosomal bay Y-shaped, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a little more than median angle; Cx-III and -IV with a series of longitudinal striae (three pairs of on Cx-IV). Palp as shown in Fig. 25 D: P- 1 with a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 proximally thicker than distally, ventral margin with an proximal inflation, distally slightly concave; P- 4 slender, equally narrowing from the base to tip. Legs: I-L (Fig. 25 E) with I- L- 6 dL/H ratio 2.6–2.7, ventral margin distally convexly protruding; IV-L: Fig. 25 F. Remarks: In the round idiosoma shape, D. liberiensis resembles D. multidentata (K. Viets, 1911) which differs in possessing a patch violet in colour on the anterior dorsum and larger dimensions (Cook 1966). Distribution: Obviously the most frequently collected and most widely distributed species in Liberia.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 45, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa unimaculata Cook 1966
No full textDjeboa unimaculata (Cook, 1966) (Figs. 34 A–F, 40 K–L) Mideopsis (Djeboa) unimaculata Cook, 1966: 236. Material examined: Type series: FMC, Liberia; holotype female, one mile north of Suehn, stream, 30.vi. 1958, Cook (Coll. 99); paratypes: same site as holotype, 20.ii. 1958 (Coll. 96); Coll. 88, 2/0/0 (details see Cook 1966). New records: Côte d’Ivoire, River N’zi near Fetekro (F), drift day, 13.i. 1977 Statzner 0/ 1 /0 (mounted); Ghana: Namini stream, Kakum NP, 5 º 23.396 N, 1 º 23.294 W, 12.ii. 2013 Smit 1 /0/0; Ankasa River, Ankasa NP, 5 º 13.011 N, 2 º 39.126 W, 13.ii. 2013 Smit 1 /0/0; tributary of Oguntwe, Ankasa NP, 5 º 16.563 N, 2 º 38.733 W, 78 m asl., 14.ii. 2013 Smit 0/ 1 /0; Ankasa Exploration Base stream, Ankasa NP, 5 º 16.413 N, 2 º 38.810 W, 81 m asl., 14.ii. 2013 Smit 1 / 1 /0; Ankasa Exploration Base trail stream, Ankasa NP, 5 º 16.415 N, 2 º 38.751 W, 80 m asl., 14.ii. 2013 Smit 1 / 1 /0; Plunge pool, Tsatsudo Falls, 7 º 07.390 N, 0º 23.365 E, 179 m asl., 22.ii. 2013 Smit 0/ 2 /0. General features: Dorsal shield oval (L/W ratio 1.1), with medial depression; muscle scars with little pronounced thickenings, located anterior and posterior to the postocularia; colour pattern consisting of an anterior blue patch (Figs. 40 K–L); gnathosomal bay Y-shaped, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a median angle; Cx-III and -IV with a series of longitudinal striae (four or five pairs on Cx-IV). Palp (Fig. 34 D): P- 1 with a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 proximally thicker than distally, ventral margin concave; P- 4 slender, equally narrowing from the base to tip. Legs: I-L (Fig. 34 E) with I-L- 6 L/H ratio 2.0– 2.3, ventral margin strongly protruding; IV-L: Fig. 34 F. Remarks: The dorsal colour pattern of D. unimaculata resembles that of D. multidentata K. Viets, 1911, but in the latter the patch is violet in colour. Furthermore, the idiosoma of D. multidentata is much smaller and proportionally narrower and the palp segments are proportionally much shorter (Cook 1966). Distribution: Liberia (Cook 1966), Côte d’Ivoire (first record), Ghana (first record).Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 58, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
FIGURE 10A–F in The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level
No full textFIGURE 10A–F. Djeboa bomiensis (Cook, 1966), L-99 (B, F = male, A, C–E female): A = dorsal shield; B–C = idiosoma, ventral view; D = palp; E = I-L; F = IV-L.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 23, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Landsat MSS classification of fire fuel types in Wood Buffalo National Park, northern Canada
No full textJ1: Global Ecology & Biogeography Letters; M3: Article; Milne, David Franklin, Steven E. Wilson, Bradley A. Ghitter, Geoff Heathcott, Mark McCaffrey, Thomas M. Ow, Charlotte F. Y.; Source Information: Mar1994, Vol. 4 Issue 2, p33; Subject Term: FOREST fires; Author-Supplied Keyword: Canada (Wood Buffalo National Park); Author-Supplied Keyword: Forest fire; Author-Supplied Keyword: Fuel type classification; Author-Supplied Keyword: Landsat data; Number of Pages: 0p; Document Type: Articl
Data for "Testing Analogical Rule Transfer in Pigeons (Columba livia)"
No full textData for "Testing Analogical Rule Transfer in Pigeons (Columba livia)" by Muhammad A. J. Qadri, F. Gregory Ashby, J. David Smith and Robert G. Cook<br
Sheep blowflies strike out!
No full textWoolgrowers are constantly concerned that the sheep blowfly may be able to breed in sheep or other animal carcasses. David Cook, Ian Dadour and Ernis Steiner report on an experiment that answers that question once and for all
Dynamics and folding of single two-stranded coiled-coil peptides studied by fluorescent energy transfer confocal microscopy
No full textWe report single-molecule measurements on the folding and unfolding conformational equilibrium distributions and dynamics of a disulfide crosslinked version of the two-stranded coiled coil from GCN4. The peptide has a fluorescent donor and acceptor at the N termini of its two chains and a Cys disulfide near its C terminus. Thus, folding brings the two N termini of the two chains close together, resulting in an enhancement of fluorescent resonant energy transfer. End-to-end distance distributions have thus been characterized under conditions where the peptide is nearly fully folded (0 M urea), unfolded (7.4 M urea), and in dynamic exchange between folded and unfolded states (3.0 M urea). The distributions have been compared for the peptide freely diffusing in solution and deposited onto aminopropyl silanized glass. As the urea concentration is increased, the mean end-to-end distance shifts to longer distances both in free solution and on the modified surface. The widths of these distributions indicate that the molecules are undergoing millisecond conformational fluctuations. Under all three conditions, these fluctuations gave nonexponential correlations on 1- to 100-ms time scale. A component of the correlation decay that was sensitive to the concentration of urea corresponded to that measured by bulk relaxation kinetics. Thetrajectories provided effective intramolecular diffusion coefficients as a function of the end-to-end distances for the folded and unfolded states. Single-molecule folding studies provide information concerning the distributions of conformational states in the folded, unfolded, and dynamically interconverting states.Author manuscript. Published in final edited form as: Proc Natl Acad Sci U S A. 2000 November 21; 97(24): 13021-13026.The final published version of this article is located at: http://www.pnas.org/cgi/reprint/97/24/13021NIH GM54616; to William F. DeGradoNIH GM12592; to Robin M. HochstrasserNIH GM48130; to William F. Degrado and Robin M. HochstrasserThis work was supported by GM54616 (to W.F.D.), GM12592 (to R.M.H.) and GM48130 (to W.F.D. and R.M.H.) with instrumentation developed under RR01348. D.S.T. was supported by National Institutes of Health Grant NRSA F32-GM18589.Also available in PubMed Central. PMCID:PMC2717
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