Cyclocephala mateoi Paz & Ratcliffe 2022, new species
<i>Cyclocephala mateoi</i> Paz &amp; Ratcliffe, new species (Figs. 7–12, 20) <... more <i>Cyclocephala mateoi</i> Paz &amp; Ratcliffe, new species (Figs. 7–12, 20) <b>Type material:</b> Holotype male and allotype female labeled: " PERU, HU. Tingo Maria, / Campus UNAS / 9°18'44.7"S / 75°59'42.9"W / 693 m. " and with our red holotype and allotype labels. Holotype and allotype deposited in MUSM. <b>Description. Holotype,</b> male. (Fig. 7). Length 14.4 mm; width 6.6 mm. Color testaceous except for black frons and apices of tibial teeth. <b>Head:</b> Frons and clypeus with punctures moderate in size and density, glabrous. Clypeal apex subtruncate, slightly reflexed. Interocular width equals 3.0 transverse eye diameters. Antenna with 10 antennomeres, club subequal in length to antennomeres 2–7. <b>Pronotum:</b> Surface with small, sparse punctures. Base lacking marginal bead. <b>Elytra:</b> Surface weakly punctate-striate, punctures slightly larger than those of pronotum, glabrous. <b>Pygidium:</b> Disc with minute, sparse punctures; lateral angles with moderately large, dense punctures and partially rugose. In lateral view, surface convex. <b>Legs:</b> Protibia tridentate, basal tooth small, distant from middle tooth. Protarsomere 5 enlarged, slightly bent, venter concave; medial claw large, bent, apex split (Fig 11). Metatarsus slightly longer than metatibia. <b>Venter:</b> Prosternal process long, columnar, apex obliquely flattened into transversely oval disc with transverse, elevated "button" on anterior half. <b>Parameres:</b> In caudal view, form elongate, base subtriangular, shaft subparallel, lateral margins of each paramere slightly flared before rounded apex (Fig. 9). In lateral view, basal piece slightly longer than parameres (Fig. 10). <b>Allotype,</b> female (Fig. 8). Length 16.3 mm; width across humeri 7.4 mm. As holotype except in the following respects: <b>Elytra:</b> Epipleuron (ventral view) expanded at level of abdominal sternites 1–2 and then abruptly constricted with a subacute tooth at level of abdominal sternite 3 (Fig. 12). In dorsal view, lateral margin slightly expanded above s [...]
FIGURES 7–12. Cyclocephala mateoi. 7 in Three new species of Cyclocephala (Coleoptera: Scarabaeidae: Dynastinae) from Amazonian Peru and a checklist of Cyclocephala species in Peru
FIGURES 7–12. Cyclocephala mateoi. 7, Male holotype; 8, female allotype; 9–10, parameres of holot... more FIGURES 7–12. Cyclocephala mateoi. 7, Male holotype; 8, female allotype; 9–10, parameres of holotype; 11, protarsal claw of holotype; 12, epipleuron (ventral view) of allotype. Scale bar = 5 mm.
Cyclocephala hylaea Ratcliffe & Paz. A 2022, new species
<i>Cyclocephala hylaea</i> Ratcliffe &amp; Paz, new species (Figs. 13–20) <b&g... more <i>Cyclocephala hylaea</i> Ratcliffe &amp; Paz, new species (Figs. 13–20) <b>Type material.</b> Holotype male and allotype female labeled: " PERU: Madre de Dios; / Rio Tambopata Res; 30 air / km. SW Pto. Maldonado, 290m. / 11–15 XI 1979 J. B. Heppner / subtropical moist forest" and with our red holotype and allotype labels. Paratypes with same data except dates of " 2–5 XI 1979 " (6 males, 10 females), " 6–10 XI 1979 " (16 males, 33 females), " 11–15 XI 1979 " (97 males, 101 females), " 16–20 XI 1979 " (24 males, 51 females), " 21–25 XI 1979 " (32 males, 43 females), and " 26–30 XI 1979 " (12 males, 16 females). Additional paratypes labeled " PERU: Cusco; / Pilcopata, 600meters / 8–10 XII 1979 / J. B. Heppner, premontane / moist forest" (1 male, 1 female) and same data except " 11–14 XII 1979 " (8 males, 21 females) and " MADRE DE DIOS / río Tambopata, 30 Km SO Pto. Maldonado / 290 m, 2-5.xi.1979 " (3 males, 8 females). Paratypes (483) each with our yellow paratype label. Holotype, allotype, and 392 paratypes (170 males, 222 females) deposited in USNM.Additional paratypes deposited in BCRC (7 males, 6 females), BMNH (3 males, 3 females), CMNC (3 males, 3 females), EGPC (3 males, 3 females), JNNC (3 males, 3 females), JPSC (3 males, 3 females), MEKRB (5 males, 7 females), MNHN (3 males, 3 females), MSPC (2 males, 4 females), MUSM (8 males, 12 females), RDCC (6), SLTC (3 males, 3 females), UNSM (3 males, 3 females), and ZMHU (3 males, 3 females). <b>Description. Holotype,</b> male. (Fig. 13). Length 12.7 mm; width 4.9 mm. Color testaceous except for black frons; 4 small, indistinct black marks on each side of pronotum; and 3 small black maculae on each elytron; pygidium, abdominal sternites, and tarsomeres reddish brown. <b>Head:</b> Frons and clypeus with punctures moderate in size and density, setigerous; setae short, tawny. Clypeal apex subtruncate, slightly reflexed. Interocular width equals 3.5 transverse eye diameters. Antenna with 10 antennomeres, club subequal in length to antennomeres 2–7. <b>Pronotum:</b> [...]
The following new species of Cyclocephala Dejean, 1821 (Coleoptera: Scarabaeidae: Dynastinae: Cyc... more The following new species of Cyclocephala Dejean, 1821 (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini) are described from Peru: C. mateoi Paz & Ratcliffe, C. ukuku Paz & Ratcliffe, and C. hylaea Ratcliffe & Paz. A description, diagnosis, geographic distribution, notes on natural history, and illustrations are provided for each new species. Six Cyclocephala species are reported for the first time from Peru: C. emarginata Endrödi, 1964, C. guianae Endrödi, 1969, C. kuntzeniana Höhne, 1923, C. malyi Dupuis, 2014, C. ovulum Bates, 1888, and C. sylviae Dechambre, 1995. An updated, annotated list of the 81 Peruvian species of Cyclocephala is provided.
Presentamos 13 especies del género Eurysternus (Coleoptera: Scarabaeidae: Oniticellini) del depar... more Presentamos 13 especies del género Eurysternus (Coleoptera: Scarabaeidae: Oniticellini) del departamento de Loreto – Perú. Registramos por primera vez para Perú a la especie Eurysternus ventricosus Gill, 1990. Además, proporcionamos fotos de los habitus y aedeagus y mapas de distribución de las especies encontradas en este departamento.
The use of multi-angular spectral information from remote sensors on space platforms has the pote... more The use of multi-angular spectral information from remote sensors on space platforms has the potential to discriminate land cover classes and other applications. In this paper the use of the base of POLDER-1 sensor (non-operating) on ADEOS platform, which yielded up to 14 multi-angular measurements of the same pixel is explored. The database was analyzed by fitting a model of the function of bidirectional reflectance distribution (BRDF) in bands centered at 443, 565, 670, 765 and 865 microns, for different types of ground cover, GLC2000 system, and thus analyze the potential of using multi-angular information to discriminate cover classes. The results showed the best adjustments in the bands 765 and 865, followed by the bands 565 and 670 and, finally, the worst adjustments occurred in the 443 band, were adjustment errors can be interpreted by problems associated with atmospheric correction of tropospheric aerosols (greater effects on the visible bands). With BRDF model adjusted usin...
A comparison study was performed to evaluate the applicability of optical and SAR data for land c... more A comparison study was performed to evaluate the applicability of optical and SAR data for land cover classification for REDD+ services on a test site in Chiapas State in Mexico. The accuracy of the maps was assessed using an independent data set that was collected from very high resolution optical data. The overall accuracy of the maps varied between 79 % of ENVISAT ASAR and 94 % of RapidEye for the forest – non-forest classifications. The accuracies for the six IPCC compliant classes were from 5 to 9 percentage units lower. Results that were obtained with the optical data were somewhat better than the results using the SAR data. However, the difference between the optical and SAR results was fairly small when L-band SAR data were used. L-band SAR data seem to be competitive alternative for optical data particularly in the areas with frequent cloud cover.
Aniversario II Guerra Mundial, 70 años de Nuremberg
El pasado mes de octubre se cumplian 70 anos desde la ejecucion de la sentencia de Nuremberg. Era... more El pasado mes de octubre se cumplian 70 anos desde la ejecucion de la sentencia de Nuremberg. Era el colofon de la guerra mas devastadora de la historia, que concluia con la condena a muerte de doce de los veintiun acusados.
Efficient water management in agricultural crops is necessary to increase productivity and adapt ... more Efficient water management in agricultural crops is necessary to increase productivity and adapt to climate change. Evapotranspiration (ET) data are key in determining the water requirements of crops and set efficient irrigation schedules. Estimating ET at the regional scale (for example, in irrigation districts) is a technically complex task that has been tackled by using data acquired by remote sensors on satellites that can be validated with scaled up field measurements when area sources are matched. Energy and matter flux measurements using the eddy covariance (EC) technique are challenging due to balance closure issues, claimed to be due to the different footprints of the energy-balance components. We describe net radiometer footprints in terms of the sun-sensor geometry to characterize the bidirectional distribution functions of albedo and thermal emissions. In this context, we describe a one-parameter model of the components of net radiation that can be calibrated with a sing...
Al igual que ocurrio con el tabaco, el Gobierno podria dar el paso de restringir el consumo de be... more Al igual que ocurrio con el tabaco, el Gobierno podria dar el paso de restringir el consumo de bebidas alcoholicas, una limitacion de libertad comparable a la Prohibicion que vivio EE UU entre 1920y 1933
One of the challenges faced by subwatershed hydrology is the discovery of patterns associated wit... more One of the challenges faced by subwatershed hydrology is the discovery of patterns associated with climate and landscape variability with the available data. This study has three objectives: (1) to evaluate the annual recession curves; (2) to relate the recession parameter (RP) with physiographic characteristics of 21 Mexican subwatersheds in different climate regions; and (3) to formulate a Baseflow (BF) model based on a top-down approach. The RP was calibrated utilizing the largest magnitude curves. The RP was related to topographical, climate and soil variables. A non-linear model was employed to separate the baseflow which considers RP as a recharge rate. Our results show that RP increases with longitude and decreases with latitude. RP displayed a sustained non-linear behavior determined by precipitation rate and evapotranspiration (P E) over years and subwatersheds. The model was fit to a parameter concurrent with invariance and space-time symmetry conditions. The dispersion of our model was associated with the product of (P E) by the aquifer's transmissivity. We put forward a generalized baseflow model, which made the discrimination of baseflow from direct flow in subwatersheds possible. The proposed model involves the recharge-storage-discharge relation and could be implemented in basins where there are no suitable ground-based data.
Visible-NIR spectroscopy as a cost-effective tool for soil organic carbon monitoring in the National Forest and Soil Inventory in Mexico
ABSTRACT Visible-NIR spectroscopy is a rapid and nondestructive analytical technique that correla... more ABSTRACT Visible-NIR spectroscopy is a rapid and nondestructive analytical technique that correlates diffusely reflected near-infrared radiation with the chemical and physical properties of materials, and has been used for assessing soil qualities. The use of this technique to estimate the soil organic matter content (carbon content) has successfully been used in Mexico. The organic matter measurement by this method is an alternative to the use of automated methods which are not cost-effective. NIR spectroscopy has shown to be rapid, convenient, simple, accurate and able to analyze many constituents at the same time. Recently this method has been used to estimate soil carbon content in samples from the National Forest and Soils Inventory in Mexico. Using NIR spectroscopy and an integration sphere has been possible to obtain reproducible spectrum of soil samples and also to lessen spectrum variations derived from particle size (2000-149 μm). Based on the spectrum footprints information it was possible to classify soils into five groups from very low to very high organic matter contents. Grouping soils according to spectral traits allows standing out differences and similarities among them. The use of NIR spectroscopy has been more than useful because we have been able to estimate the carbon content in more than 23 000 soil samples in a short period (near 400 samples per day). Using total C automated methods this would have been very difficulty, and expensive and it would have taken a very long time (50 samples per day). Currently we are working to establish strategies to improve the development of chemiometric models to predict soil organic carbon content in Mexican forests soils.
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