324,122 research outputs found
Ceratina (Zadontomerus) mikmaqi Rehan & Sheffield, new species
No full textCeratina (Zadontomerus) mikmaqi Rehan & Sheffield, new species Diagnosis. Males of C. mikmaqi can be recognized by the combination of the metallic greenish blue colour, T 3 with punctures separated by> 1 puncture diameter, and the hind femur which is only slightly dilated toward base, the lower margin carinate only in the apical half. They are very similar to C. floridana and C. dupla. Males of C. floridana have T 3 densely punctate, with interspaces ≤ 1 puncture diameter, and the carina of T 7 is more truncate. Males of C. dupla have a complete carina running the length of the hind femur. Females of C. mikmaqi are recognized by the combination of the metallic greenish colour, the small basal ivory spot on the front tibia, the largely impunctate surface in the posterior half of the mesoscutum, and the clypeus which has an elongate, median maculation, and sinuate lateral edges. They are very similar to C. dupla and C. calcarata. Females of C. dupla have distinct rows of punctures medially on the posterior half of the mesoscutum. Females of C. calcarata have the lateral edges of the clypeus more angulate, and often have the clypeal maculation greatly reduced or absent. Description. FEMALE. Length 6–8 mm; head length 1.67–2.22 mm; head width 1.75–2.04 mm; forewing length 4.63–5.3 mm. Colouration. Body mostly bluish green. Mesoscutum often black with violet reflections centrally. T 1 largely black. Apical half of clypeus, malar area, basal half of mandible, lower paraocular area, and genal area adjacent to eye margin black. Antenna dark brown to black, flagellum with ventral surface reddish brown. Tegula reddish brown. Wing membrane subhyaline, venation and pterostigma dark brown. Legs bluish green, tibia and tarsi dark brown to black, distitarsus and tarsal claw reddish, all spurs yellowish brown. Clypeus with a pale, vertically elongate, median maculation. Posterior half of pronotal lobe with pale maculation. All tibia with a small, pale basal maculation. Pubescence. Dull white. Very sparse and mostly short (≤ 1 OD). More elongate (1.5–2 OD) on vertex, frons, labrum, metanotum and mesopleuron, on legs, and basal sterna, with a few very long (> 3 OD) hairs on the apical sternum. Surface sculpture. Body in large part polished and shiny. Clypeus polished, with large, well spaced (i= 1–3 d), elongate punctures in apical half, punctures becoming rounded and smaller basally. Supraclypeal area with large, well spaced (i= 1–2 d) punctures apically, becoming much finer and dense (i≤d) between antennal sockets. Lower paraocular and antennocular area punctation rather dense (i= 1–1.5 d). Upper paraocular and ocellocular areas with punctation sparser (i= 2–3 d), becoming closer (i= 1–1.5 d) on vertex. Frons with swellings largely impunctate, punctures fine and close (i≤d) adjacent to median ocellus. Gena above with punctation close (i= 1–1.5 d), punctures elongate, becoming sparse (i> 3 d) to virtually impunctate below and adjacent to eye. Mesoscutum polished, punctation coarse, moderately dense (i=d) anteriorly and along lateral and posterior margins, largely impunctate medially, with irregularly spaced punctures along medial line and parapsidal lines. Mesoscutellum similar to mesoscutum, submedial punctation moderately sparse (i= 1–3 d). Axilla and metanotum with punctation fine and close (i=d). Tegula largely impunctate, with very fine, close (i<d) punctures on inside margin. Pronotum with punctation fine and close (i=d), with small impunctate area anterior to pronotal lobe. Pleural punctation course and close (i=d) throughout, punctures becoming slightly sparser (i= 1.5 d) below. Metapostnotum largely tessellate apically, with strong, well spaced striae basally. Propodeum finely and densely punctate throughout (i≤d). T 1 largely shiny and impunctate, often with a few fine, sparse (i= 2–3 d) punctures at apicolateral edge, and with with a triangular area of coarser, closer (i=d) punctures apicomedially, T 2 –T 4 punctation more coarse, quite deep and distinct, close laterally (i≤ 1 d), becoming well separated (i= 2–3 d) medially, punctures on apical edge of T 2 and T 3 becoming finer (i≤ 1.5 d), T 4 becoming irregularly roughened in apical half, though with punctures visable to apical edge, T 5 rugose, without distinct punctures except on apical edge, T 6 entirely rugose; all sterna coarsely and closely punctate (i<d), punctures becoming slightly separated (i≤d) laterally on S 2 –S 4. Structure. Head width varying (length/width ratio = 0.95–1.09). Eyes with inner margins subparallel to slightly converging below. Clypeus inverted T-shaped, 1 / 3 below suborbital tangent, apicolateral margins broadly rounded. Antennal sockets evenly spaced (IAD=AOD). Gena narrower than eye (0.54–0.8). Hypostomal carinae parallel, reflexed distally. Mandibles 3 -dentate, with median tooth larger and longer than 1 st and inner teeth. F 1 longer than broad (1.5: 1), nearly as long as F 2 +F 3, F 2 –F 5 broader than long, F 6 quadrate, remaining flagellomeres slightly longer than broad. T 6 apical margin coming to a fine triangular point. MALE. Similar to female except for the usual secondary sexual characters and as follows. Length. 5–7 mm; head length 1.3–1.48 mm; head width 1.38–1.57 mm; forewing length 3.7–4.1 mm. Colouration. As in female except tibia typically dark blue; labrum with a large, pale central maculation; clypeal maculation inverted T-shaped, large, filling most of surface. Pubescence. Generally as in female, except long hairs (2 OD) present laterally on T 4 –T 7, on apical margin of S 2 – S 5. T 6 with apex of process with a tuft of dense, short, yellowish pubescence. Carina of T 7 laterally with elongate (2 OD) yellowish hairs. Surface sculpture. Generally as in female. T 6 entirely rugose; T 7 more distinctly punctate basally, surface of carina smooth and sparsely punctate; all sterna coarsely and closely punctate. Structure. Head round to slightly elongate (length/width ratio = 0.94). Eyes strongly convergent below (UOD/LOD ratio = 1.2–1.3). Clypeus inverted T-shaped, 1 / 3 below suborbital tangent, apicolateral margins broadly rounded. Antennal sockets slightly separated (IAD/OAD= 1.2). Gena narrower than eye (2: 3) in smaller specimens, to wider than eye (4: 3) in larger ones. Hypostomal carinae parallel, reflexed distally. Mandibles 2 -dentate, with upper tooth larger and longer than 1 st tooth. F 1 quadrate to very slightly longer than broad, F 2 –F 5 broader than long, F 6 quadrate, remaining flagellomeres slightly longer than broad. Hind femur somewhat dilated toward base but not angulate, the length more than twice the width, the lower margin carinate only in the apical half. T 6 with a prominant rounded medial process overhanging the apical margin of T 7. T 7 with a wide, broadly rounded to subtruncate carina. Apical margin of S 6 with a deep median cleft, lateral margins bent ventrally. S 7 and genital armature as in C. dupla and C. calcarata (see Mitchell 1962). Etymology. Ceratina mikmaqi is named in honour of the Mi’kmaq, the First Nations People of Nova Scotia where this species was first discovered with DNA barcoding (Sheffield et al. 2009). Type material. The male holotype of C. mikmaqi was collected in Middleton, N 44.9665, W 65.5755, Annapolis Co., Nova Scotia, Canada on 20.vi. 2002, col. Cory Sheffield [DNA barcode sample ID “02-NS- 1619 ”]; the specimen is in good condition, but missing the right antenna and middle leg. The female allotype was collected in Forest Home, N 44.9117, W 64.5288, Kings Co., Nova Scotia, Canada on 2.vii. 2003, cols. C. Sheffield, S. Rigby, and K. Jansen [DNA barcode sample ID “sheffT- 58 ”]; the specimen is in excellent condition, but missing the right hind leg. Both holotype and allotype are in the Packer Collection at York University (PCYU). Paratypes were designated from the following locations: CANADA: NS; Avonport, N 45.119, W 64.273, Kings Co., 21.vi. 2001 [3; “01-NS- 1622 ”], col. Cory Sheffield; East Torbrook, N 44.927, W 64.93, Kings Co., 20.vi. 2002 [3; “02- NS- 1618 ”], col. Cory Sheffield; Somerset, N 45.0836, W 64.7322, Kings Co., 22.vi. 2001 [3; “sheffT- 62 ”], col. Cory Sheffield; West Black Rock, N 45.13, W 64.74, Kings Co., 5.vi. 2002 [3, “02-NS- 1621 ”], col. Cory Sheffield; ON; Cambridge, Shade`s Mills Conservation Area, N 43.38, W80.284, 12.vii. 2007 [Ƥ, “G 5 S- 20070712 -002”], 30.viii. 2007 [Ƥ, “G 5 B- 20070830 -001”], 23.vii. 2007 [3, “ O 1 Y- 20070723 -006”], col. M. Horn; Waterloo, Chesapeake Drive, N 43.508, W80.505, 01.vii. 2008 [3, “N 3 Y- 20080701 -005”; Ƥ, “N 3 Y- 20080701 -006”]; St. Catharines, Brock University Campus, N 43.119, W79.249, 1.viii. 2008 [Ƥ, “08-ON- 2151 ”]; 3.viii. 2008 [Ƥ, “08-ON- 2146 ”]; 14.viii. 2008 [2 Ƥ, “08-ON- 2150 ”, “08-ON- 2147 ”], col. J. Vickruck; UNITED STATES: MD; N 38.909, W 76.683, Pr. George’s Co., 18.vi. 2009 [Ƥ, “CCDB-01570 D03’], col. S.W. Droege; NE; N 41.2774, W 95.9116, Douglas Co., 10.v. 2007 [3, “CCDB-01570 F 11 ”], col. S.W. Droege; NY; N 41.029, W 72.138, Suffolk Co., 07.ix. 2005 [Ƥ, “CCDB-01570 E03”], col. S.W. Droege; KY; N 36.924, W 84.872, Wayne Co., 27.vii. 2007 [Ƥ, “CCDB-01570 B06”], col. S.W. Droege; WI; N 43.338, W 89.949, Sauk Co., 5.ix. 2007 [4 Ƥ, “CCDB-01570 D08 – D 11 ”], col. M. Mossman. Paratypes are in the Packer Collection at York University (PCYU). Distribution. Ceratina mikmaqi ranges in Canada from Nova Scotia to southern Ontario, and south into the northeastern United States, as far west as Nebraska, and south to Kentucky. Its range overlaps that of C. dupla and C. calcarata (see Mitchell [1962] and Daly [1973]).Published as part of Rehan, Sandra M. & Sheffield, Cory S., 2011, Morphological and molecular delineation of a new species in the Ceratina dupla species-group (Hymenoptera: Apidae: Xylocopinae) of eastern North America, pp. 35-50 in Zootaxa 2873 on pages 39-43, DOI: 10.5281/zenodo.20289
Ceratina (Zadontomerus) mikmaqi Rehan
No full textCeratina (Zadontomerus) mikmaqi Rehan & Sheffield 2011 County records: Allegan, Antrim, Barry, Berrien, Branch, Calhoun, Cass, Charlevoix, Cheboygan, Chippewa, Clare, Clinton, Delta, Dickinson, Eaton, Gratiot, Hillsdale, Huron, Ingham, Ionia, Jackson, Kalamazoo, Kalkaska, Lake, Lapeer, Leelanau, Lenawee, Marquette, Mecosta, Montcalm, Montmorency, Muskegon, Newaygo, Oakland, Oceana, Osceola, Ottawa, Roscommon, Saginaw, Shiawassee, St. Clair, St. Joseph, Van Buren, Washtenaw, Wayne, Wexford. Notes. Ceratina mikmaqi was described recently based on material from Nova Scotia, Ontario, Maryland, Nebraska, New York, Wisconsin and Kentucky (Rehan & Sheffield 2011). Since then it has proven to be a common and widely distributed species (Zarrillo et al. 2016). The first published record for Michigan came several years after the original description (Carson et al. 2016). Males of C. mikmaqi are very similar to C. dupla and would have been treated as this species in earlier works (e.g., Daly 1973, see above). Males differ from C. dupla by the sparse mesoscutal punctation, ecarinate hind tibia at ventral midlength, and wider T7 apical lamella. Females are similar to C. calcarata in the sparse mesoscutal punctation, but can be distinguished from that species by the sparse pubescence of the metasomal sterna. We also reconfirm the presence of C. calcarata and C. dupla in Michigan. The males of C. calcarata are distinctive, so Daly’s identifications of these remain valid. As Ceratina mikmaqi has proven to be so widespread and abundant, we do not list specific records, but a list of counties is presented below.Nesting in Ontario described by Vickruck et al. (2011).Published as part of Gibbs, Jason, Ascher, John S., Rightmyer, Molly G. & Isaacs, Rufus, 2017, The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history, pp. 1-160 in Zootaxa 4352 (1) on page 66, DOI: 10.11646/zootaxa.4352.1.1, http://zenodo.org/record/106385
FIGURE 1. Species collection locations. Ceratina floridana indicated with black triangles, C in Morphological and molecular delineation of a new species in the Ceratina dupla species-group (Hymenoptera: Apidae: Xylocopinae) of eastern North America
No full textFIGURE 1. Species collection locations. Ceratina floridana indicated with black triangles, C. dupla in gray circles, and C. mikmaqi in black circles.Published as part of Rehan, Sandra M. & Sheffield, Cory S., 2011, Morphological and molecular delineation of a new species in the Ceratina dupla species-group (Hymenoptera: Apidae: Xylocopinae) of eastern North America, pp. 35-50 in Zootaxa 2873 on page 37, DOI: 10.5281/zenodo.20289
Ceratina (Zadontomerus) mikmaqi Rehan 2011
No full textCeratina (Zadontomerus) mikmaqi Rehan and Sheffield, 2011 Counties: Aitkin, Anoka, Becker, Beltrami, Big Stone, Blue Earth, Brown, Carlton, Carver, Cass, Chippewa, Chisago, Clay, Clearwater, Cook, Cottonwood, Dakota, Dodge, Douglas, Faribault, Fillmore, Freeborn, Goodhue, Grant, Hennepin, Houston, Hubbard, Isanti, Itasca, Jackson, Kanabec, Kandiyohi, Kittson, Lac qui Parle, Lake, Lake of the Woods, Lincoln, Lyon, Mahnomen, Marshall, Martin, McLeod, Meeker, Mille Lacs, Morrison, Mower, Murray, Nicollet, Nobles, Norman, Olmsted, Otter Tail, Pennington, Pine, Pipestone, Polk, Pope, Ramsey, Red Lake, Redwood, Renville, Rice, Rock, Saint Louis, Scott, Sherburne, Sibley, Stearns, Steele, Stevens, Swift, Todd, Traverse, Wabasha, Waseca, Washington, Watonwan, Wilkin, Winona, Yellow Medicine. Comments: There are a lack of historic records for this species due to lumping by Daly (1973) with C. dupla.Published as part of Portman, Zachary M., Gardner, Joel, Lane, Ian G., Gerjets, Nicole, Petersen, Jessica D., Ascher, John S., Arduser, Mike, Evans, Elaine C., Boyd, Crystal, Thomson, Robin & Cariveau, Daniel P., 2023, A checklist of the bees (Hymenoptera: Apoidea) of Minnesota, pp. 1-95 in Zootaxa 5304 (1) on page 33, DOI: 10.11646/zootaxa.5304.1.1, http://zenodo.org/record/804856
The costs and benefits of sociality in a facultatively social bee
No full textAbstract not availableSandra M. Rehan, Miriam H. Richards, Mark Adams, Michael P. Schwar
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Author's address:
No full textCan archives of audiovisual TV interviews be used to make authors more visible to students, and thereby reduce the learning gap between native and non-native language speakers in college classes? We examined students in a college course who learned about one scholar's ideas through watching an audiovisual TV interview (i.e., visible author format) and about another scholar's ideas through reading a formal text description (i.e., invisible author format). For the invisible author, native language speakers scored significantly higher than the non-native language speakers on a corresponding exam question (i.e., a cognitive measure), generated more words on the exam question (i.e., a motivational measure), and mentioned the author's name more often in answering the exam question (i.e., an affective measure). For the visible author, the groups did not differ on any of these measures. These findings provide evidence for the idea that making the author visible through audiovisual TV interviews can eliminate the learning gap between native and non-native language speakers. 3 Universities around the world serve students who are non-native speakers of th
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