131,608 research outputs found
Neoathyreus julietae Howden, 2006, new species
No full textNeoathyreus julietae, new species (Figs. 1–3) Holotype. Male, length 10.9 mm, greatest width 7.4 mm. Dorsally with labrum, clypeus, and lateral edges of pronotum near foveae reddish brown, remainder of pronotum black tinged with brown; elytra black; ventral surfaces varying from reddish brown to dark brown. Labrum coarsely rugose, particularly across basal third. Clypeus coarsely rugose, transverse carina defined by row of irregular transverse tubercles; anterior oblique carinae absent; posterior transverse clypeal carinae distinct on each side of median tubercle, tubercle only slightly higher and anterior to lateral tubercle on each side. Vertex very slightly depressed between eyes, surface coarsely, contiguously granulate; between granules surface with numerous erect, pale tan setae. Gena with outer margins elevated, outer anterior angle slightly acute, surface of gena granulate. Pronotum (Fig. 1) with small fossa on each side contiguous with anterior marginal bead posterior to eye; width of fossa approximately equal to width of adjacent bead; between fossae margin gradually elevated to midline, midline with indistinct tubercle on bead; tubercle extending posteriorly as low, narrow, glabrous ridge for approximately 0.7 mm. Pronotum with inner and outer carinae welldefined, inner carinae moderately thick with anterior ends separated by distance approximately equal to distance between outer edges of eyes; inner pronotal carinae from anterior ends almost straight, gradually converging, becoming parallel at posterior end of pronotal concavity, terminating 0.5 mm before posterior margin. Pronotal concavity deepest medially between anterior ends of inner carinae, surface granulatepunctate anteriorly, becoming smooth in posterior fourth of concavity; setose in anterior third between granules and near inner edge of carinae. Outer pronotal carina on each side in posterior half 1.7 mm long, curved, slightly closer to pronotal margin than to inner carina. Lateral pronotal fovea on each side shallow, elongate, surface mostly smooth; pronotal marginal bead absent in indentation below fovea. Pronotal surface laterad to inner carinae closely, coarsely granulate, posteriorly granules contiguous; many long, erect, pale tan setae arising from bases of granules. Elytron with several vague strial indentations near base of disc, surface of disc coarsely, contiguously granulate, granules near base transversely oval, becoming elongate in apical third; numerous tan or black, almosterect setae arising between granules. Pygidium brown, apex broadly rounded. Metasternum between middle coxae slightly convex, anterior edge near midline obliquely angulate, midline represented by narrow, depressed line, surface on either side relatively uniformly setosepunctate. Foretibia (Fig. 1) with five teeth on outer edge. Genital capsule with apex of ventral lobe rounded, fringed with setae, flattened surface of lobe glabrous. Genitalia as in Figs. 2, 3. Allotype. Female, length 10.5 mm, greatest width 6.7 mm. Dorsally lacking reddish brown areas on head and pronotum, these areas black tinged with brown, elytra black. Similar to holotype except as follows: clypeus with irregular transverse carina very close to apical margin; median tubercle on clypeus less developed, no higher than lateral tubercles; pronotal concavity reduced in depth, posterior smooth area no more than half length of that of male. Type Series. Holotype, male, Bolivia, Dep. Sta Cruz, Buena Vista, 1922, R. C. Robert, Howden coll. ex A. Martínez coll. (CMNC). Allotype, female, Bolivia, D Sta. Cruz, Pica Ichilo, Buena Vista, Tacu, III.[19] 51, Martínez, Howden coll. ex A. Martínez coll. (CMNC). Paratypes, 8 males, 13 females. Bolivia: Cochabamba, 2 males, 1 female, 67.5 km E Villa Tunari, Est. Biol. Valle Sajta, Univ. San Simon, 300 m, 17 0 6 ' 19 " S 64 46 ' 57 " W, 9–13.II. 1999, F. Génier, lowland rain forest, ex FIT, 99 068,9; Dpto. Sta. Cruz: 4 males, 9 females, 5 km SSE Buena Vista, Hotel Flora y Fauna, 440 m, 17 29.925 ' S 63 39.128 ' W, 6 –15, 15–24, 24– 31.XII. 2003, S. & J. Peck, forest FIT; 2 females, 3.7 km SSE Buena Vista, Hotel Flora y Fauna, 17 29 ' S 63 33 ' W, 28.IV– 2.V, 7–12.V. 2004. A. R. Cline, FIT; 1 male, Ichilo, P[arque] N[acional] A[mboró] (Saguayo), 500 m, 8– 12.III. 1991, Pablo Bettella; 1 female, San Pedro, 26.VI. 1990, C. J. Pruett. Peru: 1 male, near Satipo, Junin,> 1000 m (Yungas), XII. 2004, flying at dusk. Paratypes are in: ABTS, CMNC, HAHC, NKMC WBWC. Remarks. Variation in the type series is moderate. Length varies from 9.5 to 11.0 mm, and greatest width from 5.5 to 7.0 mm. The transverse anterior clypeal carina may be vague or distinct; the posterior clypeal carina and associated tubercles are reduced in height in small specimens. The inner pronotal carina and concavity are both reduced in small specimens; the height and thickness of the carinae are less and the depth and posterior smooth area of the concavity are similarly reduced; in one specimen the smooth area is almost absent. In one specimen the lateral marginal bead of the pronotum is complete. The reddish brown color on the head and sides of the pronotum is lacking in more than half of the series, these being brownish black to black. The number of teeth, five, on the foretibia is quite constant, but there are six teeth in one female. There are also slight differences in the shape of the apical lobes of the male genitalia but this is, at least partly, because of distortion when dry or differences caused by positioning. Neoathyreus julietae will usually key to couplet 44 in Howden (1985). In that couplet most specimens would key to N. inermis Howden, but differ from that species by having fewer teeth on the foretibia, 7 or 8 for N. inermis; also the male genitalia are radically different. The other species in couplet 44, N. lanuginosus (Klug), is close to N. julietae in key characters, but differs in dorsal color and in the shape of the male genitalia. Both N. lanuginosus and N. julietae occur in the Buena Vista region of Bolivia. While the two species that key out to couplet 44 may be somewhat related to N. julietae, the most closely related species is probably N. obscurus Howden, described from four specimens from Brazil. In my 1985 key, N. obscurus will key to couplet 30; this includes species with four teeth on the foretibia. This species should also have been keyed to species with five teeth on the foretibia as one paratype has a very small fifth tooth. A small series of N. obscurus, recently collected in Mato Grosso, Brazil, by F. Génier, all have a small fifth tooth on the foretibia, as do most N. julietae. Externally the two species are not always separable because of variation in the teeth of the foretibia and in the marginal pronotal bead. The bead is usually complete in N. obscurus and broken in N. julietae; however, in the series at hand, the reverse is true for one specimen of each species. The only certain way to distinguish the two species is by the differences in the male genitalia and, as far as is known, by the different ranges of the two species. This complex is a good example of the desirability of having a good series when dealing with closely related species. Etymology. This species, N. julietae, is named for Julieta Ledezma, Curator, Entomology, NKMC, Santa Cruz, Bolivia, who was extremely helpful to my wife and me during our visit to Bolivia. She has shown the same consideration to other entomologists visiting Bolivia.Published as part of Howden, Henry F., 2006, New species and a new subgenus of South American Neoathyreus Howden and Martínez (Coleoptera: Geotrupidae: Athyreini), pp. 37-52 in Zootaxa 1137 on pages 38-41, DOI: 10.5281/zenodo.27339
The Evolution And Biogeography Of Henry F. Howden
No full textGill, Bruce D. (2006): The Evolution And Biogeography Of Henry F. Howden. The Coleopterists Bulletin (mo5) 60: 7-18, DOI: 10.1649/0010-065x(2006)60[7:teaboh]2.0.co;
An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae)
No full textHowden, Henry F., Gill, Bruce D. (2005): An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae). The Coleopterists Bulletin 59 (2): 272-274, DOI: 10.1649/774, URL: http://dx.doi.org/10.1649/77
Onthophagus browni Howden and Cartwright
No full textOnthophagus browni Howden and Cartwright Fig. 41–43 Diagnosis. Dorsum black, occasionally showing weak greenish reflections; legs coffee brown. Length 5–7.5 mm. Pronotum evenly but not densely covered by small shining granules, each with associated short seta, on field of extremely fine shagreening (as in Fig. 48); elytral interstriae with two longitudinal rows of small, setose granules on field of fine shagreening; pygidium evenly punctate, punctures setose. Front legs similar in the two sexes. Male (Fig. 41–42) – Head lacking horns, bearing two transverse carinae; clypeus slightly upturned medially. Pronotum with large, flattened, apically widened, emarginate process extending over posterior portion of head (reduced in small individuals). Female (Fig. 43) – Head bearing two simple, transverse carinae; clypeal margin not upturned. Pronotum convex except for low, transverse ridge rising above anterior margin. Complete formal description given by Howden and Cartwright (1963). Big Bend collection sites (altitudinal range: 725–1785 m). Presidio Co.: [1] C.E. Miller Ranch (~ 16 km W Valentine), 30°32′50″N 104°39′40″W (Camp Holland) 1410 m (Aug); [2] ~ 16 km W Valentine (Miller Ranch, near headquarters), 30°33°30″N 104°38′44″W, 1350 m (Jul–Aug); [3] ~ 6 km W Marfa (Hip-O Ranch), 30°21′54″N 104° 7′12″W, 1530 m (Aug–Sep); [4] Fort Leaton, 29°32′31″N 104°19′28″W, 770 m (Jun); [5] ~ 40km E Redford via Hwy 170, Grassy Banks Rest Area, 725 m, ~ 29°17′01″N 103°53′12″W (nd). Jeff Davis Co.: [1] ~ 16 km NE Valentine, Muerto Springs Ranch (Muerto Springs), 30°40′50″N 104°20′22″W, 1555 m (Jul); [2] Davis Mountains Preserve, 31°37′42″N 104°05′01″W, 1785 m (May). Collection method(s). a) baited pitfall trap (human feces); (b) incandescent light trap; (c) flight intercept trap; (d) *soil beneath wood rat nest. Surface activity. Nocturnal. Habitat. All zones in association with wood rats (Neotoma). Comments. This species is closely related to O. velutinus; and while males and larger females are easily distinguished, small or worn females can be difficult to identify if not associated with larger specimens or conspecific males. While they are attracted to human feces, they are collected in significantly larger numbers from soil beneath the living area of wood rat nests (Halffter and Matthews 1966; Howden and Cartwright 1963). Onthophagus browni is also common in southeastern Arizona, where it was apparently referred to as O. hecate by Dajoz (1994). Bill Warner (pers. comm.) reports that O. browni and O. velutinus are separated by altitude/habitat in southeastern Arizona, the former species higher in the mountains and the latter at lower elevations in the flats and bajadas, a distribution pattern paralleled by Copris arizonensis and C. macclevei.Published as part of Edmonds, W. D., 2018, The dung beetle fauna of the Big Bend region of Texas (Coleoptera: Scarabaeidae: Scarabaeinae), pp. 1-30 in Insecta Mundi 642 on page 10, DOI: 10.5281/zenodo.370818
Onthophagus anewtoni Howden and Genier 2004
No full text<i>Onthophagus anewtoni</i> Howden and Génier, 2004 <p>(Figs. 1b, 2)</p> <p> <b>Known Distribution.</b> Before our record reported herein, this species was only known from its type series localities in the states of Guerrero, Jalisco, and Oaxaca, Mexico (Howden and Génier 2004).</p> <p> <b>Examined Material.</b> Forty-two specimens (24 males, 18 females). <b>MEXICO:</b> CHIAPAS: Chiapa de Corzo municipality, 8.2 km NE of Chiapa de Corzo, deciduous forest, 16°43 <b>ʹ</b> 44.17 <b>ʹʹ</b> N, 92°55 <b>ʹ</b> 56.91 <b>ʹʹ</b> W, 875 m, 30.VI.2017, squid (216, 16♀), pig dung (16), G. Sánchez-Hernández, R. Dávila and A. Gómez cols.; idem except 28.VII.2017, squid (26), pig dung (16), fermented fungus (1♀), G. Sánchez- Hernández, R. Dávila and C. Valdez cols.</p> <p> <b>Comments.</b> The presence of this species in the central region of Chiapas matches with other species of the subfamily, such as <i>Phanaeus demon</i> Castelnau, 1840 and <i>Canthidium laetum</i> Harold, 1867, that are distributed along the Mexican Pacific coast and use the slopes of the Sierra Madre de Chiapas (Reserva de la Biósfera La Sepultura) to expand their distribution towards the Central Depression of Chiapas (Kohlmann and Sol´ıs 2006a; Lizardo <i>et al.</i> 2017). Our locality record extends the distribution range approximately 300 km east of the closest known locality, Tequesistlán, Oaxaca.</p>Published as part of <i>Sánchez-Hernández, Gibrán & GóMez, Benigno, 2018, First Precise Locality Data for Onthophagus atriglabrus Howden and Gill and New State Record for Onthophagus anewtoni Howden and Génier (Coleoptera: Scarabaeidae: Scarabaeinae) in Mexico, pp. 873-876 in The Coleopterists Bulletin 72 (4)</i> on page 875, DOI: 10.1649/0010-065X-72.4.873, <a href="http://zenodo.org/record/5387219">http://zenodo.org/record/5387219</a>
Fig. 5. Germarostes carltoni, n in An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae)
No full textFig. 5. Germarostes carltoni, n. sp., holotype, male genitalia, lateral view.Published as part of <i>Howden, Henry F. & Gill, Bruce D., 2005, An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae), pp. 272-274 in The Coleopterists Bulletin 59 (2)</i> on page 274, DOI: 10.1649/774, <a href="http://zenodo.org/record/10105116">http://zenodo.org/record/10105116</a>
Fighting the Turk in the Balkans : an American's adventures with the Macedonian revolutionists / by Arthur D. Howden Smith.
No full textFigs. 1–4. Germarostes carltoni, n in An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae)
No full textFigs. 1–4. Germarostes carltoni, n. sp., Holotype. 1) Head, dorsal view; 2) head and pronotum, dorsolateral view; 3) elytron and hind tibia, lateral view; 4) elytron, apical lateral view.Published as part of <i>Howden, Henry F. & Gill, Bruce D., 2005, An Unusual New Species of Germarostes Paulian from Peru (Coleoptera: Scarabaeidae: Ceratocanthinae), pp. 272-274 in The Coleopterists Bulletin 59 (2)</i> on page 273, DOI: 10.1649/774, <a href="http://zenodo.org/record/10105116">http://zenodo.org/record/10105116</a>
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Revisions of the Genera<i>Endroedianibe</i>Chalumeau and<i>Hispanioryctes</i>Howden and Endrödi (Coleoptera: Scarabaeidae: Dynastinae) from Hlspaniola, with Descriptions of New Species
No full textFigs. 17–18. Hispanioryctes rugulopygus, parameresPublished as part of Ratcliffe, Brett C. & Cave, Ronald D., 2011, Revisions of the Genera Endroedianibe Chalumeau and Hispanioryctes Howden and Endrödi (Coleoptera: Scarabaeidae: Dynastinae) from Hlspaniola, with Descriptions of New Species, pp. 1-14 in The Coleopterists Bulletin 65 (1) on page 9, DOI: 10.1649/0010-065X-65.1.1, http://zenodo.org/record/489302
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