1,725,666 research outputs found
Globicornis (Hadrotoma) ingelehmannae Háva & Damgaard 2015, sp. n.
No full textGlobicornis (Hadrotoma) ingelehmannae sp. n. (fig. 1–3) T y p e m a t e r i a l. Holotype ♂: Russia, Kaliningrad, Baltic amber inclusion (ZMUC). The type specimen are labeled with a red printed label bearing the following text: “HOLOTYPE Globicornis (Hadrotoma) ingelehmannae sp. n. Háva & Damgaard det. 2015”. D e s c r i p t i o n. Body broadly-oval (fig. 1–2), measurements (in mm): TL 2.7, EW 1.6. Head, pronotum and elytra black; head coarsely punctate, with long black erected setation; palpi entirely black; frontal median ocellus present; antenna with 10 antennomeres, antennal club with 3 antennomeres entirely black (fig. 3). Antennal fossa not visible. Eye very large, with black microsetae. Pronotum coarsely punctate as head, with long black erect setation and prominently raised side edge delineated by fine demarcation line. Scutellum triangular, black, without setation. Elytron finely coarsely punctate on humerus, finely on posterior parts, cuticle unicolorous, black without fasciae or spots. Apex of each elytron with long blackish setation. Legs black with black setation; protibia without spines. Metasternum coarsely punctate, with short black setation. Abdominal ventrites with long black setation. D i a g n o s i s. The new species belong to the genus Globicornis Latreille, 1829 subgenus Hadrotoma Erichson, 1846 according to antennae composed with 10 antennomeres, terminal antennomere triangular and flat, new species differs from the other two known amber species by the characters mentioned in the key below. The new species differs from the visually similar species Attagenus hoffeinsorum Háva, Prokop et Herrmann, 2006 and A. yantarnyi Háva et Bukejs, 2012 by the prosternum forming a “collar” under which mouthparts fit when head is retracted (fig. 5). E t y m o l o g y. Patronymic, dedicated to commemorate Dr. Inge Lehmann (1888– 1993), an excellent Danish seismologist and geophysicist.Published as part of Háva, J. & Damgaard, A. L., 2015, A New Species Of Globicornis (Hadrotoma) (Coleoptera, Dermestidae, Megatominae) From Baltic Amber, pp. 373-376 in Vestnik Zoologii 49 (4) on pages 374-375, DOI: 10.1515/vzoo-2015-0041, http://zenodo.org/record/645255
Fig. 1 in Evolution of the semi-aquatic bugs (Hemiptera: Heteroptera: Gerromorpha) with a re-interpretation of the fossil record
No full textFig. 1. Phylogenetic tree for the families of Gerromorpha and subfamilies of Hydrometridae, Veliidae and Gerridae summarized from DAMGAARD (in press). Temporal distribution of fossils indicated by heavy branches; unbroken branches denote range extensions inferred from fossils; broken branches denote range extension inferred from sister group relationships.Published as part of Damgaard, Jakob, 2008, Evolution of the semi-aquatic bugs (Hemiptera: Heteroptera: Gerromorpha) with a re-interpretation of the fossil record, pp. 251-268 in Acta Entomologica Musei Nationalis Pragae 48 (2) on page 258, DOI: 10.5281/zenodo.534089
(068) Reeve Damgaard
No full textExcerpt from page 28 of "B.C.'s Inland Empire" by Erskine Burnett associated with this image: We called on Reeve Damgaard at his tree-embowered home, overlooking the lake, about one mile out of town. We noticed several fine specimens of hardwoods bordering the lawn including White Oak, Sugar Maple and White Ash. He told us that after travelling in many lands he had picked on British Columbia, and, in particular, the Salmon Arm district, as "having everything". He mentioned that in his capacity of reeve he always tried to spare the trees bordering on the municipal roads. A well-grown specimen that had taken a hundred years to mature might be cut down in a few minutes
Evolution of the semi-aquatic bugs (Hemiptera: Heteroptera: Gerromorpha) with a re-interpretation of the fossil record
No full textDamgaard, Jakob (2008): Evolution of the semi-aquatic bugs (Hemiptera: Heteroptera: Gerromorpha) with a re-interpretation of the fossil record. Acta Entomologica Musei Nationalis Pragae 48 (2): 251-268, DOI: 10.5281/zenodo.534089
The effect of competition between two spatially separated markets - An investigation of two interlinked Bak-Sneppen models
No full textThis paper investigates the effect of competition in a market consisting of interlinked economic agents. In particular, the effect of increased competition from the surrounding markets is demonstrated. The presented work is an extension of the Bak-Sneppen model (Bak and Sneppen 1993). Here are two Bak-Sneppen models interlinked such that if the lowest fitness value of one market exceeds the fitness values of the other market minus transportation cost, all cells lower than this band will receive a new random value. The model shows that interdependency between markets has a strong effect on the competitiveness of the least competitive market. The external competition is able to make the least competitive market perform better as well as worse than on its own.Bak-Sneppen model, interdependency, competition, Marketing,
Potamobates tumaquensis Padilla-Gil & Damgaard, 2011, n. sp.
No full textPotamobates tumaquensis n. sp. Type material. HOLOTYPE, M, allotype F (all apterous): COLOMBIA, Nariño, Tumaco, Consejo Comunitario Río Mejicano, Vereda Santa Rosa, 0 m, 6 II 2009, leg. D. N. Padilla (ICN). PARATYPES, same data as holotype, all apterous, 2 M, 1 F (PSO-CZ); Nariño, Tumaco, Consejo Comunitario Río Mejicano, Vereda San José del Guayabo, 0 m, 3 II 2009, leg. D. N. Padilla, 3 M, 1 F (ICN). COLOMBIA, Nariño, La Espriella Tumaco, 2 m, 30 I 2010, leg. N. Nicola, (all apterous): 1 M (CP); Nariño, Tumaco, Consejo Comunitario Río Mejicano, Vereda Retoño, 0 m, 4 II 2009, leg. D. N. Padilla, 1 F (CP). Description. Ground color shining black; body covered with very dense, short and dark pubescence; head with triangular, yellow mark, vertex black; pronotum with wedge-shaped, yellow marking medially, propleura silver; mesonotum with posterior wedge-shaped and yellow mark medially, and pleurae with a linear, longitudinal, silverish stripe; posterolateral corners of meso- and metanotum with silvery marks; lateral margins of abdominal tergites and posterior margin of tergite VIII silvery. Genital segments black. Antennae and legs shining black; all coxae, fore trochanter, apex of middle and hind trochanters, and dorsal fore femur yellow. Venter yellow and with a black spot near to the fore coxae. Apterous male (Fig. 2). Body length 10.8; maximum width (across mesocoxae) 2.52. Length of head (1.08) more than three times narrowest interocular space (0.32); width of eye 0.68; eyes extending posteriorly 1 / 5 onto pleura. Rostrum not reaching hind margin of prosternum. Pronotum length (0.88), width (1.88). Mesonotum long (2.8) and widest across mesocoxae (2.52). Metanotum short (0.84), widest across metacoxae (2.2). Abdomen longer (2.12) than the length of the genital segments (1.84). Tergites I and VI: 0.32, tergites II–IV: 0.2, V: 0.24, VII: 0.64, and VIII 1.24. Tergite VII with angulated connexiva; tergite VIII not modified; proctiger bearing a short, thorn-like shape projection on left side (Fig. 3), terminating in a “bird-head” shape. Male terminalia as shown in Figs. 3, 4. Antennae length of segments I: 1.48, II: 0.6, III: 0.52, IV: 1.0. Anterior femur stout, tapering distally. Proportions of male legs as follows: fore femur/tibia/tarsal 1 /tarsal 2: 2.20 / 2.32 / 0.18 / 0.50; of middle leg, 9.86 / 7.33 / 2.28 / 0.62; of hind leg, 10.60 / 5.06 / 0.42 / 0.30. Apterous female. Body length 11.46, maximum width (across mesocoxae) 3.0, coloration similar to that of male. Margins of connexival segments I–V thickened, posterolateral angles of segments VI and VII slightly folded inward (Fig. 5); connexiva not produced posteriorly. Abdominal tergite VIII triangular (Fig. 5), ventrite VIII semitriangular (Fig. 6); second genital segment exposed as a cylindrical segment (Fig. 6). Ecological notes. P. tumaquensis occurs in the Tumaco Municipality (Fig. 1), situated in the Pacific lowlands (0–2 m), with high rainfall (4000–8000 mm /annum), and tropical wet forest vegetation. The species was found on a clear, flowing, water stream, occurring syntopically with Brachymetra albinervis (Amyot & Serville, 1843) at Santa Rosa; and with Telmatrometra whitei Bergroth 1908 at Guayabo and Retoño. They apparently prefer to aggregate in small groups of two or three individuals, or alone as solitary individuals, with only one large group having been found. Etymology. The name “ tumaquensis ” refers to the Colombian municipality of Tumaco, from which the types were collected. Comparative notes. P. tumaquensis is similar to P. horvathi, but the male of tumaquensis has the process of the proctiger exposed and characteristic.Published as part of Padilla-Gil, Dora N. & Damgaard, Jakob, 2011, A new species of Potamobates Champion from Colombia with a re-analysis of phylogenetic relationships (Hemiptera: Gerridae), pp. 41-49 in Zootaxa 2879 on pages 43-44, DOI: 10.5281/zenodo.20206
- …
