2,266 research outputs found
Tresuncinidactylus Přikrylová & Barson & Shinn 2021, gen. n.
No full text<i>Tresuncinidactylus</i> gen. n. <p>ZooBank number for species:</p> <p>urn:lsid:zoobank.org:act: E36CE744-A54F-4531-8BA5-ECAFD4A4DFE3</p> <p> Type and only species: <i>Tresuncinidactylus wilmienae</i> sp. n.</p> <p> <b>Diagnosis</b> (based on 8 specimens). Body fusiform, comprising body proper (cephalic regions, trunk and peduncle) and opisthaptor. Body wall thin and smooth. Cephalic region bilobed, each lobe bears a spike sensillum. Cephalic gland present. Eye spots absent. Mouth situated ventrally. Pharynx spherical, comprised of two bulbs, anterior bulb presents finger-like pharyngeal processes. Oesophagus branching into two simple, blind-ended intestinal crura that extend beyond uterus. Viviparous, only one embryo <i>in utero</i> observed. Male copulatory organ consists of muscular pouch, positioned ventrally, close to bifurcation of intestinal crura, armed with approximately 30 gracile spines.</p> <p>Opisthaptor delineated from body, bearing a single pair of large, slender hamuli with constriction on outer edge between shaft and point regions on each hamulus. Hamuli root prominently flattened; ventral terminus of hamulus cap tapered. Large muscle masses and tendons associated with hamulus root caps evident. Small and simple ventral bar, without anterolateral processes; thin lingulate membrane present. Thin, simple dorsal bar. Sixteen marginal hooks with large falculate sickles of one morphological type, but of three different sizes, length of each sickle being approximately equal in length to that of their handle. Two largest pairs of marginal hooks positioned closest to opisthaptoral peduncle, neighbouring two pairs of medium-sized marginal hook sickles situated along lateral margins of opisthaptor, and remaining four pairs and smallest marginal hooks positioned along posterior margin of opisthaptor. E t y m o l o g y: Generic name refers to the presence of marginal hooks of three differing sizes.</p>Published as part of <i>Přikrylová, Iva, Barson, Maxwell & Shinn, Andrew P., 2021, Description of Tresuncinidactylus wilmienae gen. et sp. n. (Monogenea: Gyrodactylidae), from the gills of the bulldog, Marcusenius macrolepidotus (Peters) from Lake Kariba, Zimbabwe, pp. 1-12 in Folia Parasitologica (025) (025) 68</i> on page 4, DOI: 10.14411/fp.2021.025, <a href="http://zenodo.org/record/8143640">http://zenodo.org/record/8143640</a>
Tresuncinidactylus wilmienae Přikrylová & Barson & Shinn 2021, gen. et sp. n
No full text<i>Tresuncinidactylus wilmienae</i> gen. et sp. n Figs. 1, 2 <p>ZooBank number for species:</p> <p>urn:lsid:zoobank.org:act: E36CE744-A54F-4531-8BA5-ECAFD4A4DFE3</p> <p> <b>Description</b>. Coverslip-flattened specimens 550–755 (606, n = 6) long, 103–127 (114, n = 6) wide at level of the uterus. Pharynx muscular bulb 35–48 (43, n = 7) long and 38–45(41) wide; anterior bulb of pharynx with eight, short pharyngeal processes. Excretory bladders present. MCO observed in three specimens; MCO muscular pouch, 19–24 (21, n = 3) long, 13–14 (13, n = 3) wide, armed with 30 gracile spines. Hamuli total length 140–154 (146, n = 8), point length 45–53 (50, n = 8), shaft length 125–134 (129, n = 8), root length 28–32 (30, n = 8). Dorsal bar 16–19 (18, n = 6) long and 2–3 (2, n = 6) width. Ventral bar 13–16 (14, n = 7) wide, 7–10 (8, n = 7) long. Marginal hooks (large anterior positioned pairs): handle length 19–23 (22, n = 21); sickle length 20–23 (21 n = 22); ratio handle: sickle 1.0–1.1 (1.0); sickle loop length 25–28 (26, n = 22); sickle proximal width 12–16 (14, n = 22); sickle point length 10–12 (11, n = 22). Marginal hooks (median lateral positioned pairs): handle length 13–17 (15, n = 16); sickle length 14–16 (15, n = 18); ratio handle: sickle 1.0–1.1 (1.0); sickle loop length 18–21 (19, n = 17); sickle proximal width 9–12 (10, n = 17); sickle point length 7–9 (8, n = 16). Marginal hooks (small posterior positioned pairs): handle length 11–13 (12, n = 17); sickle length 11–13 (12, n = 16); ratio handle: sickle 1–1.1 (1.0); sickle loop length 15–17 (16, n = 17); sickle proximal width 8–12 (9, n = 17); sickle point length 6–7 (7, n = 17).</p> <p> T y p e h o s t: <i>Marcusenius macrolepidotus</i> (Peters) (Osteoglossiformes: Mormyridae).</p> <p>Ty p e l o c a l i t y: Lake Kariba, Zimbabwe (-16.5270, 28.847344)</p> <p>T y p e m a t e r i a l: Holotype, one paratype and one hologenophore deposited in the Helminthological Collection of the Institute of Parasitology, the Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic (M-758). Another two specimens, one paratype and one hologenophore, in the parasitological collection in the National Museum, Bloemfontein, South Africa (NMB P 798 and 799), and two additional paratype specimens deposited in the parasite collection of the Royal Museum for Central Africa, Tervuren, Belgium (RMCA VERMES 43423 and 43424).</p> <p>S i t e o n t h e h o s t: Gill filaments.</p> <p>M o l e c u l a r s e q u e n c e d a t a: Three specimens were successfully sequenced and the longest sequence for each region was deposited in the nucleotide database GenBank under accession numbers MZ479697 and MZ474665 for ITS and 18S rDNA, respectively. The 18S rDNA sequence was 1,864 bp long and ITS rDNA 669 bp; the latter consists of partial ITS1- 291 bp, 5.8S- 157 bp, and partial ITS2-221bp.</p> <p>E t y m o l o g y: The species is named in honour of Wilmien Luus-Powell from the University of Limpopo, a close friend and colleague of the principal author, for her endless support and enormous contribution to research on the Monogenea in African freshwater fishes.</p>Published as part of <i>Přikrylová, Iva, Barson, Maxwell & Shinn, Andrew P., 2021, Description of Tresuncinidactylus wilmienae gen. et sp. n. (Monogenea: Gyrodactylidae), from the gills of the bulldog, Marcusenius macrolepidotus (Peters) from Lake Kariba, Zimbabwe, pp. 1-12 in Folia Parasitologica (025) (025) 68</i> on pages 4-5, DOI: 10.14411/fp.2021.025, <a href="http://zenodo.org/record/8143640">http://zenodo.org/record/8143640</a>
Tuttiett, Mary Gleed [pseud. Maxwell Gray] (1846–1923), novelist
No full textBiographical entry of popular female author Maxwell Gray
Gyrodactylidae
No full textKey to genera of the Gyrodactylidae from African freshwater fish <p>1 (2) Opisthaptor with 16 marginal hooks of one type...... 3</p> <p> 2 (1) Opisthaptor with 16 marginal hooks of differing morphologies; five pairs of marginal hooks with large falculate sickles and three pairs of smaller hooks with well articulated sickles ….............................. <i>Diplogyrodactylus</i></p> <p> 3 (4) Marginal hooks of one morphological type, but of differing sizes, length of each sickle being approximately equal in length to that of their handle...................................................................................... <b> <i>Tresunicidactylus</i> gen. n.</b> </p> <p> 4 (5) Marginal hook of one type and of equal size and equally distributed around the periphery of the opisthaptor........... 6 5 (4) Distribution of the marginal hooks unequal; 14 marginal hooks located along the posterior margin of the opisthaptor, two marginal hooks located on anterolateral lobes; ventral bar with two pairs of rods....................... <i>Macrogyrodactylus</i></p> <p> 6 (7) Opisthaptor with additional suction discs; ventral bar complex consists of an inverted U-shaped piece with two semi-attachedbars........................... <i>Mormyrogyrodactylus</i></p> <p>7 (8) Hamuli with only one (inner) developed root........... 9</p> <p> 8 (7) Hamuli with two developed roots; outer root conspicious............................................. <i>Afrogyrodactylus</i></p> <p> 9 (10) Bulbous MCO; MCO equipped with one apical spine and one to several rows of small spines; one pair of hamuli connected by a simple dorsal bar; ventral bar with or without anterolateral processes, ventral bar membrane present........................................................... <i>Gyrodactylus</i></p> <p> 10 (9) MCO muscular; MCO consists of central curved cone, muscular pouch armed with numerous small spines; one pair of hamuli with a notable constriction at the junction between the shaft and point regions on each hamulus; simple dorsal and ventral bars; parasite on Citharinidae.. <i>Citharodactylus</i></p>Published as part of <i>Přikrylová, Iva, Barson, Maxwell & Shinn, Andrew P., 2021, Description of Tresuncinidactylus wilmienae gen. et sp. n. (Monogenea: Gyrodactylidae), from the gills of the bulldog, Marcusenius macrolepidotus (Peters) from Lake Kariba, Zimbabwe, pp. 1-12 in Folia Parasitologica (025) (025) 68</i> on pages 6-8, DOI: 10.14411/fp.2021.025, <a href="http://zenodo.org/record/8143640">http://zenodo.org/record/8143640</a>
DECAY OF SOLUTIONS OF MAXWELL-KLEIN-GORDON EQUATIONS WITH ARBITRARY MAXWELL FIELD
No full textIn the author's previous work, it has been shown that solutions of Maxwell-Klein-Gordon equations in R3+1 possess some form of global strong decay properties with data bounded in some weighted energy space. In this paper, we prove pointwise decay estimates for the solutions for the case when the initial data are merely small on the scalar field but can be arbitrarily large on the Maxwell field. This extends the previous result of Lindblad and Sterbenz, in which smallness was assumed both for the scalar field and the Maxwell field.SCI(E)ARTICLE81829-1902
Foreign direct investment in a macroeconomic framework : finance, efficiency, incentives, and distortions
No full textDoes foreign direct investment (FDI) increase domestic investment, or does it provide additional foreign exchange for a pre-existing current account deficit, or some linear combination of the two? The author investigates this question for a group of five Pacific Basin countries and a control group of 11 other developing countries. For the sample of all 16 developing countries, the author finds that FDI does not provide additional balance of payments financing for a pre-existing current account deficit. In the control group of 11 developing countries, FDI is associated with reduced domestic investment - implying that FDI to those countries is simply a close substitute for other capital inflows. For the five Pacific Basin market economies, however, FDI raises domestic investment by the full extent of the FDI inflow. The author finds that FDI has a significantly negative impact on national saving in the sample of all 16 developing countries. For the control group, this negative effect is similar in magnitude to FDI's negative effect on domestic investment - implying a zero effect on the current account. But FDI's negative effect on national saving in the five Pacific Basin developing market economies implies that FDI could have more of a negative effect on the current account than through increased domestic investment alone. The author also investigates the impact of FDI on economic growth in these 16 countries, taking into account distortions in the economies. He estimates reduced-form current account equations, and presents an analytical framework for estimating FDI's effect on economic growth in the presence of incentive-disincentive packages and other economic distortions. He illustrates his framework using indicators of foreign trade and financial distortions. His main conclusion: the effect of FDI differs markedly from one group of countries to another. FDI has a negative effect on economic growth in the control group. It has the same positive effect on growth as domestically financed investment does in the Pacific Basin countries. The main cause for the different effect is the low level of distortion in the Pacific Basin countries.Environmental Economics&Policies,Economic Theory&Research,Foreign Direct Investment,International Terrorism&Counterterrorism,Macroeconomic Management
Maxwell Whiteman collection of Hendricks family papers undated, 1799-1872, 1971
No full textCollection consists of Hendricks family papers that were in the possession of Maxwell Whiteman, author of Cooper For America. The collection includes accounts and business correspondence written to Harmon Hendricks primarily from trade metal agents Solomon Moses (1774-1857) and Joseph Lyon Moss (1804-1874). An invitation to the third annual meeting of the Coppers Manufacturers Association is also available. The collection also contains a copy of Whiteman's book, photographs of illustrations Whiteman used for Cooper in America, and a photograph of Edmund HendricksSid LapidusMr. Sid Lapidu
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