2,333 research outputs found
FIGURES 31–32. Mesocoelium monodi. 31 in Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387
No full textFIGURES 31–32. Mesocoelium monodi. 31. Ventral view of adult (BMNH 1954.11.4.4). 32. Ventral view of adult. (BMNH 1960.5.27.16).Published as part of Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1) on page 73, DOI: 10.11646/zootaxa.3387.1.1, http://zenodo.org/record/525392
Mesocoeliidae Dollfus 1929
No full textKey to the genera of Mesocoeliidae <p> 1a. Testes tandem....................................................................... <i>Pintneria</i> Poche, 1907</p> <p> 1b. Testes oblique to nearly side by side................................................ <i>Mesocoelium</i> Odhner, 1910</p>Published as part of <i>Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1)</i> on page 7, DOI: 10.11646/zootaxa.3387.1.1, <a href="http://zenodo.org/record/5253926">http://zenodo.org/record/5253926</a>
Mesocoelium neohylae Dronen & Calhoun & Simcik 2012, n. sp.
No full textMesocoelium neohylae n. sp. (Figures 45–48; Table 12) Type host: Hyla cinerea (Schneider), American green treefrog (Anura: Hylidae) Type locality: Burleson County, Texas, USA, 30° 24’ N, 96° 13’ W. Site: Intestine. Deposited specimens: Holotype USNPC 104821.00; Paratype USNPC 104822.00. Description: Based on eight adult specimens. With characteristics of genus. Body leiperi type, small, elongate with somewhat tapered posterior end, holotype 2,525 (range 2,500 –2,740; mean 2,620) by 975 (950 –1,175; 1,075); no spines observed; forebody 725 (725–800; 763) long, 27–29% of body length. Mouth slightly subterminal; oral sucker spherical, wider than long, 280 (270–300; 290) by 300 (295–320; 310); prepharynx short; pharynx wider than long, 94 (88–95; 91) by 122 (120–138; 129); esophagus longer than prepharynx, 62 (60–78; 70) long; cecal bifurcation 1/2 distance down forebody; ceca reaching well posterior to ovary, occupying 42% (37–47%; 43%) of postovarian space. Ratio of widths of oral sucker and pharynx 1:2.5 (1:2.3–1:2.5; 1:2.4). Ventral sucker located ⅓ distance down body, smaller than oral sucker, 247 (245–278; 260) by 196 (190–220; 200). Ratio of sucker widths 1:1.5 (1:1.4–1:1.5; 1: 1.5). Testes smooth, side by side to slightly diagonal, situated at level of upper ⅓ of ventral sucker. Right testis 218 (215–220; 217) by 234 (230–270; 250); left testis 219 (218–230; 224) by 228 (200–230; 220). Cirrus sac medial, situated between cecal bifurcation and ventral sucker, enclosing short cirrus, reduced pars prostatica, short ejaculatory duct surrounded by prostate cells, and bipartite seminal vesicle, 148 (145–169; 159, 6–7% of body length) by 58 (57–62; 59) wide. Genital pore immediately postbifurcal on midline of body. Ovary smooth, posttesticular, situated immediately posterior to right testis, 216 (214–237; 226 by 182 (182–226; 204), removed from posterior end by some distance, postovarian space 1,685 (1,500–1,740; 1,575) long, 58–64% of body length. Seminal receptacle spherical, located immediately sinistral to ovary. Laurer’s canal present, opening not observed. Vitelline follicles relatively large, 60–99 (53–99; 78) by 36–68 (36–73; 58), distributed along ceca from level of posterior margin of oral sucker posteriorly to midlevel of hindbody, terminating immediately anterior to cecal ends on one side, and some distance posterior to cecal ends on one side. Uterus largely postacetabular, filling most of hindbody. Eggs operculate, 40–44 (40–46; 43) by 24–29 (23–29; 26) (n = 40). Excretory vesicle Y-shaped, with poorly developed arms; excretory pore slightly subterminal. Remarks: These specimens (USNPC 104821.00; 104822.00) have moderately long ceca, and a genital pore that is postbifurcal and median, placing them in the leiperi body type. The ceca occupy 37–47% of the length of the postovarian space and the ratio of the width of the pharynx to the width of the oral sucker 1:2.3–1:2.5, placing them in Mesocoelium neohylae n. sp. (Table 12). The new species is most similar to M. leiperi by having the posterior extent of the vitelline fields terminating near to, or surpassing the cecal ends posteriorly, the anterior extent of the vitelline fields reaching to the level of the pharynx or more anterior, ratio of the width of the ventral sucker to the width of the oral sucker that is 1:1.6 or less and ceca that occupy more than 37% of the length of the postovarian space. The new species differs from M. leiperi by having a larger body size (2,500 –2,740 long compared to 1,970), a smaller ratio of the width of the pharynx to the width of the oral sucker (1:2.3–1:2.5 compared to 1:3.5) and a longer egg (40–46 compared to 38–40) (Table 12). The new species is from H. cinerea (treefrog) from Texas, USA rather than from T. piscator (Asiatic water snake) from the Union of Myanmar.Published as part of Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1) on pages 86-88, DOI: 10.11646/zootaxa.3387.1.1, http://zenodo.org/record/525392
The Driving Force Behind Theater : an Examination of Three Facets of Professional Theater : The Theater, Theatrical Companies, and the Freelance Designer
No full textiv, 66 p.The author interned with freelance lighting and stage designer Steven R. Espach, working on three shows for two non-for-profit theater companies on Long Island, New York.East Hampton, New York
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Illustrated key to the Dendroctonus of North America
No full textJames R. LaBonte, Steven A. Valley, Oregon Dept. of Agriculture.Title from PDF cover (viewed on December 11, 2020).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Illustrated key to the species of Ips, Orthotomicus, and Pseudips of North America (or spines, spines, and more spines)
No full textJames R. LaBonte, Steven A. Valley, Oregon Dept. Agriculture.Title from PDF cover (viewed on December 11, 2020).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Mesocoelium gonocephali Singh 1967
No full textMesocoelium gonocephali (Table 16) Type host: Gonocephalus grandis (Gray), sailfin or crested river dragon (Squamata: agamidae). Type locality: Malaysia. Site: Intestine. Specimen examined: Paratype (1) BMNH 1972.4.7. 1. Description of paratype specimen: Based on one adult specimen. With characteristics of genus. Body leiperi type, relatively large, elongate with slightly rounded ends, body spinose, 2,900 by 913; body spines not observed; forebody 670 long, 23% of body length. Mouth subterminal; oral sucker spherical to subspherical, 310 by 275, prepharynx short; pharynx wider than long, 100 by 110; esophagus longer than prepharynx, 105 long; cecal bifurcation ½ distance down forebody; ceca reaching well posterior to ovary, terminating about midlevel of body, occupying 15% of length of postovarian space. Ratio of widths of oral sucker and pharynx 1:2.5. Ventral sucker located upper ¼ of body, smaller than oral sucker, 210 by 230. Ratio of sucker widths 1:1.2. Testes smooth, slightly diagonal, overlapping posterior ½ of ventral sucker. Right testis 153 by 135; left testis 150 by 163. Cirrus sac medial, situated immediately postbifurcal, well anterior to ventral sucker, enclosing short cirrus, reduced par prostatica, short ejaculatory duct surrounded by prostate cells and bipartite seminal vesicle, 190 (7% of body length) by 63. Genital pore immediately postbifurcal, median. Ovary smooth, posttesticular, situated immediately posterior to right testis, 193 by 233, removed from posterior end by some distance; postovarian space 1,925 long, 66% of body length. Seminal receptacle spherical, located immediately sinistral to ovary. Laurer’s canal present, opening not observed. Vitelline fields distributed along ceca from level of pharynx posteriorly to midlevel of body, terminating a short distance posterior to cecal ends; vitelline follicles 46 (30–55) by 43 (32–60) (n = 5). Uterus occupies most of hindbody, largely postacetabular. Eggs operculate, 35 (32–38) by 23 (22–24) (n = 20). Excretory vesicle Y-shaped with poorly developed arms; excretory pore slightly subterminal. Remarks: This specimen (BMNH 1972.4.7.1) has moderately long ceca, and a genital pore that is postbifurcal and median, placing it in the leiperi body type. The posterior extent of the vitelline fields surpass the cecal ends posteriorly, the anterior extent of the vitelline fields reach anteriorly to the level of the pharynx, the ratio of the width of the ventral sucker to the width of the oral sucker is 1:1.2, the ceca occupy 15% of the postovarian space, the ratio of the width of the pharynx to the width of the oral sucker is 1:2.5, the cirrus sac comprises 7% of the body length and the eggs are 32–38 by 22–24, placing it in M. gonocephali. This specimen was apparently fixed without coverslip pressure and because this paratype specimen was of marginal quality it was not illustrated. Mesocoelium carli as originally described and illustrated by André (1915) (Figure 49)— Not redescribed hereinPublished as part of Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1) on pages 88-90, DOI: 10.11646/zootaxa.3387.1.1, http://zenodo.org/record/525392
Mesocoelium Odhner 1910
No full textGenus <i>Mesocoelium</i> Odhner, 1910 <p> <b>Diagnosis.</b> With characteristics of family. Body elongate to oval or elliptical, often rounded at both ends, may be somewhat tapered posteriorly, (typically widest from level of ventral sucker to near midlevel of body), some species with body attenuated posteriorly, typically clavate (widest at level of forebody). Preoral lobe sometimes evident; oral sucker subterminal; mouth opening ventrally, centrally located in oral sucker in some species, opening more anteriorly in others (sometimes approaching being terminal); prepharynx short, nearly absent; pharynx smaller than oral sucker, muscular, usually wider than long; esophagus present, much longer than prepharynx; ceca short (not surpassing ovary posteriorly) to moderately long (surpassing ovary, extending some distance into postovarian space, rarely extending beyond midlevel of postovarian space). Ventral sucker well above midlevel of body, usually in anterior ⅓ of body, smaller than oral sucker. Testes spherical to subspherical, sometimes laterally elongate, generally smooth, oblique to nearly side by side, at level of ventral sucker, occasionally postacetabular. Cirrus sac well developed, enclosing bipartite seminal vesicle and prostate cells, often clavate, largely between cecal bifurcation and ventral sucker, may overlap anterior margin of ventral sucker. Genital pore prebifurcal, median or submedian; bifurcal, median or submedian; or postbifurcal and median. Ovary oval to elongate, smooth, postesticular, forming triangle with testes. Seminal receptacle saccate, posteromedial to ovary. Laurer’s canal present. Uterus with highly folded ascending and descending limbs, filling most of postovarian space, ascending limb passing lateral to testes opposite of ovary; uterine loops may approach body wall; metraterm short, indistinct. Vitellaria follicular, ventral and lateral to ceca; vitelline fields may reach to midlevel of oral sucker anteriorly, posterior extent variable, terminating from some distance anterior to ventral sucker to midlevel of postovarian space, exceptionally more posterior. Excretory vesicle Y-shaped, with poorly developed arms to I-shaped; excretory pore terminal to slightly subterminal. Life cycle where known utilizes terrestrial snail first intermediate host, where cercariae may form metacercariae in first intermediate host or possibly in a second snail host; arthropods may be implicated as potential second intermediate hosts for some species. Adults in intestines of amphibians and reptiles, rarely fish; found between 49º N and 49º S latitudes.</p> <p> <b>Type species.</b> <i>Mesocoelium sociale</i> (Lühe, 1901) Odhner, 1910.</p>Published as part of <i>Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1)</i> on page 7, DOI: 10.11646/zootaxa.3387.1.1, <a href="http://zenodo.org/record/5253926">http://zenodo.org/record/5253926</a>
Mesocoelium malayanum Palmieri & Sullivan 1977
No full textMesocoelium malayanum (Figure 22; Table 16) Definitive host: Psamnophis sibilans (Linnaeus), striped sand snake (Squamata: Lamprophiidae). Locality: Kenya. Site: Intestine. Specimens examined: BMNH 1986.9.22. Description of specimens: Based on four specimens. With characteristics of genus. Body monas type, small, posteriorly attenuated, body tapering markedly posteriorly, nearly club-shaped, forebody wider than hindbody, 1,581 (1,400 –1,688) by 377 (425–563); body spines not observed; forebody 535 (450–600) long, 32–37% of body length. Oral sucker spherical to subspherical, 233 (200–250) by 247 (200–283), mouth opening anterior from center of sucker, nearly terminal; prepharynx short; pharynx subspherical to spherical, wider than long, 101 (88–120) by 115 (93–135); esophagus 75 (25–170) long; cecal bifurcation near midlevel of forebody; ceca surpassing ovary posteriorly, terminating near midlevel of hindbody, occupying 29–45% of postovarian space. Ratio of width of oral sucker and pharynx 1:2.2 (1:2.0–1:2.4). Ventral sucker located anterior to midlevel of body, smaller than oral sucker, 203 (175–220) by 202 (178–225). Ratio of sucker widths 1:1.2 (1:1.0–1:1.5). Testes smooth, diagonal, situated at level of ventral sucker. Right testis 155 (98–200) by 131 (85–180); left testis 156 (113–200) by 140 (103–180). Cirrus sac situated between pharynx and ventral sucker, enclosing short cirrus, reduced pars prostatica, short ejaculatory duct surrounded by prostate cells, and bipartite seminal vesicle, 155 (110–170, 8–11% of body length) by 61 (33–95). Genital pore immediately postpharyngeal, prebifurcal, submedian. Ovary smooth, posttesticular, situated short distance posterior to right or left testis, 172 (100–270) by 86 (76–90), removed from posterior end by some distance; postovarian space 789 (700–870) long, 47–54% of body length. Ratio of width of ovary to mean width of testes 1:1.6 (1:1.3–1:2.0). Seminal receptacle spherical, located immediately sinistral and slightly posterior to ovary. Laurer’s canal present, opening on dorsal surface. Vitelline fields distributed along ceca from level of pharynx posteriorly to near midlevel of postovarian space, terminating near to, or surpassing cecal ends; vitelline follicles 28 (17–43) by 25 (17–33) (n = 20). Uterus largely postacetabular, filling most of hindbody. Eggs operculate, 43 (40–45) by 28 (25–30) (n = 30). Excretory vesicle Y-shaped, with poorly developed arms; excretory pore terminal. Remarks: These specimens (BMNH 1986.9.22) have moderately long ceca, and a genital pore that is prebifurcal and submedian, placing them in the monas body type. The posterior extent of the vitelline fields terminate near to, or surpass the cecal ends posteriorly; the gonads overlap the area of the ventral sucker and the body is markedly attenuated posteriorly (nearly club-shaped) so that the forebody is wider than the hindbody, placing them in M. malayanum. Although the eggs of these specimens are somewhat wider (25–30 compared to 22–24), they conform to the original description by Palmieri & Sullivan (1977) in all remaining diagnostic characteristics (Table 16) and were collected from the Old World as the specimens used in the original description of this species (Africa compared to Malaysia). The specimens from BMNH were collected from the striped sand snake, P. sibilans, while those used in the original description were from the fanged river frog, L. macrodon.Published as part of Dronen, Norman O., Calhoun, Dana M. & Simcik, Steven R., 2012, Mesocoelium Odhner, 1901 (Digenea: Mesocoelidae) revisited; a revision of the family and re-evaluation of species composition in the genus 3387, pp. 1-96 in Zootaxa 3387 (1) on page 60, DOI: 10.11646/zootaxa.3387.1.1, http://zenodo.org/record/525392
- …
