134,852 research outputs found
Aegognathus arnaudi Caceres, Rios-Malaver, and Grossi 2019
No full textAegognathus arnaudi Cáceres, Ríos-Málaver, and Grossi, 2019 Aegognathus arnaudi Cáceres et al., 2019: 2152 (original combination and description) (Figure 5f–g: holotype J and paratype ♀) Examined material Holotype male labelled: ′ Peru, Region de Junín, Satipo Province, Arpayo, −11.457 / −76.643, 1800 m, 26–28.ix. 2008, fermented bait in canopy, J.M. Zevallos et Aguilar colls̍. – 1J (CERPE). Diagnosis Species very similar to Aegognathus waterhousei, differing in a few characters. Body black with some bluish reflections present on the elytra. Abdominal ventrites with a somewhat continuous carina along sides and lacking the setose tubercles present at the last abdominal ventrite in A. waterhousei. Large aedeagus (Figure 8f) compared with other Aegognathus species, dorsal cross bar slightly lobed posteriorly with no acuminate projections. Females of this species differ from males in presenting a reduction in head and mandible size; and in the punctation, which is stronger in females, with coarse dense to contiguous punctures along dorsal surface. Styli (Figure 8g) symmetrical with truncate apex with a short distance in between. For the complete description see Cáceres et al. (2019). Distribution Southern Peru, Central Cordillera. Ucayali province (Morrone et al. 2022). Remarks Aegognathus arnaudi was recently described by Cáceres et al. (2019). This species is very similar to the type species A. waterhousei, differing only in a few characters, such as the missing lateral tubercles at the last ventrite and the absence of posterior projections at the dorsal cross bar of the aedeagus. According to the collection data, these two cryptic species seem to be sympatric. For the complete description, see Cáceres et al. (2019).Published as part of Cáceres, Juan Sebastián D. & Grossi, Paschoal Coelho, 2023, Taxonomic revision of Aegognathus Leuthner, 1883 (Coleoptera: Lucanidae), pp. 557-595 in Journal of Natural History 57 (9 - 12) on page 590, DOI: 10.1080/00222933.2023.2198736, http://zenodo.org/record/797544
Aegognathus dulima Caceres, Rios-Malaver and Grossi 2019
No full textAegognathus dulima Cáceres, Ríos-Málaver and Grossi, 2019 (Figure 5e: holotype J) Aegognathus dulima Cáceres et al., 2019: 2150 (original combination and description) Examined material Holotype J labelled: Colômbia, Tolima, Ibagué, Termales el Rancho, Cañon del Río Combeima, 31.viii.2014, 4.0817°N, 79.727°W, 2987 m, luminosa – Y. Gutiérrez and I. C. Ríos-Málaver. 1J (CERPE). Diagnosis Body black, with distinct bluish and reddish reflections. Head setose along the anterior margin. Eyes slightly emarginate; mandibles dorsally carinate at the base, wavy internally, with a subtriangular median tooth and two rounded basal teeth. Three longitudinal costae over the elytra. Abdominal ventrites with yellowish setae, especially along ventrite V; Ventrite I–IV with wrinkled lateral margins. Genitalia (Figure 8e) small compared with other Aegognathus species, with a short and flat everted sac. For the complete description see Cáceres et al. (2019). Distribution Colombia, Northern Central Cordillera. Magdalena province (Morrone et al. 2022). Remarks Aegognathus dulima is the second Colombian species of this genus; it was recently described by Cáceres et al. (2019) and represents the first description for Aegognathus after the important contributions published by Arnaud and Bomans between 2000 and 2010. Besides being the second species of the genus known from Colombia, it is the one with the highest altitude record, collected close to 3000 m asl, in the proximity of the snow-capped mountain ′ Nevado del Tolima ̍, located in a region of high conservation value. Until now only the holotype male was known. For the complete description see Cáceres et al. (2019).Published as part of Cáceres, Juan Sebastián D. & Grossi, Paschoal Coelho, 2023, Taxonomic revision of Aegognathus Leuthner, 1883 (Coleoptera: Lucanidae), pp. 557-595 in Journal of Natural History 57 (9 - 12) on page 589, DOI: 10.1080/00222933.2023.2198736, http://zenodo.org/record/797544
Cyclocephala everardoi Grossi, Santos & Almeida, 2016, sp. nov.
No full textCyclocephala everardoi sp. nov. (Figures 1 G, 2 A–E) Material examined. Holotype male labeled: “ Brasil, MG, 8 km ao N de/Cristália, 16.ii. 2010, luz/ 16 o 39 'S, 42 o 53 'W, 720m,/Grossi, Parizotto & Melo/ao amanhecer (5–6: a.m.)” (CERPE). Holotype male. Total length: 9.01 mm. Total pronotal width: 3.59 mm. Body: Dorsal surface glabrous, ventrally densely setose, setae distinctly elongate. Color brownish red, with lighter areas on clypeal apex, pronotum, scutellum (Fig. 2 A), legs, and venter. Head: Shape transverse with abrupt narrowing to clypeus, sparsely punctate; punctures larger on clypeus and on sides; clypeus narrowly parabolic, ⅓ of head width, with elongated punctures, anteriorly concave, and with C–shaped punctures, apex reflexed and bordered (Fig. 2 B). Frontoclypeal suture obsolete at middle, with 2 lateral, transverse impressions. Antennae with lamellae extremely developed, almost 3 x longer than antennomeres 3–7 together, and strongly and densely punctate with a spongiose aspect, and with scattered setae (Fig. 2 C); first lamella externally with longitudinal row of dense setae; eyes large, wider than clypeal width (Figs 1 G– 2 B). Mouthparts: Mandibles slender, apices upturned and externally curved and with elongated setae, basal half laterally crenulated; last maxillar palpomere slightly longer than the preceding 2 together. Pronotum: Surface weakly and sparsely punctate, punctures stronger posteriorly; posterior margin slightly projected backward, rounded, with no bead; sides with long setae, weakly crenulated. Scutellum punctate; punctures small to large, some elongate. Elytra: Surface distinctly and irregularly punctate; striae not well defined, slightly wrinkled near suture. Legs: Protibiae with 3 distinct teeth, teeth decreasing in size from apex to base; apical tooth twice as long as middle tooth, middle tooth more than 3 x longer than basal tooth (Figs 2 A–B); inner claw widely bifid, forming a right angle (Fig. 2 D). Venter: Anterior prosternal margin sinuous and crenulated by setae insertion, distinctly trilobed at middle, with lateral lobes more prominent than middle lobe, conspicuous (Fig. 1 G). Prosternal process high, exceeding coxal height. Genitalia: Parameres symmetrical with elongated parameres, with 2 lateral projections, one basal and one at middle; basal larger, middle one projecting backwards; apices diverging internally, externally with small serrations; subapex with a slightly diverging, rounded tooth at external angle (Fig. 2 E). Etymology. This species is named in honor of the dedicated entomologist, Everardo José Grossi, father of the first author, a doctor with a passion for beetles and an expert in rhinoceros beetles. The specimens were collected with UV light. Cyclocephala everardoi sp. nov. was taken at dawn in February 2010, between 5:00 and 6:00 A.M., in an area of sandy and rupestrian Cerrado fields (Fig. 3 A). Cyclocephala machadoi sp. nov. lacks other information. Both holotypes are pinned; in C. everardoi sp. nov. part of the middle tooth of left protibia is missing, while in C. machadoi sp. nov. part of the right first and second antennal lamellae are missing. They were initially confused with Cyclocephala macrophylla Erichson 1847. Cyclocephala machadoi sp. nov. is similar to C. everardoi sp. nov. and was also confused with this. In comparing them, we concluded that they were similar but distinct species and they are diagnosed in the Table 1. We also believe that they compose a new species group within Cyclocephala, being diagnosed by the short body length, extremely elongate antennal lamellae, eyes very developed, clypeus elongate and truncate, somewhat quadrate and inner claw of anterior tarsi with a wide incision.Published as part of Grossi, Paschoal C., Santos, Mariana D. & Almeida, Lúcia M., 2016, Two new species of Cyclocephala (Coleoptera: Scarabaeoidea: Melolonthidae) from Minas Gerais State, Brazil, pp. 245-251 in Zootaxa 4078 (1) on pages 249-250, DOI: 10.11646/zootaxa.4078.1.22, http://zenodo.org/record/25589
FIGURES 6A–D in A new species of Eupatorus Burmeister, 1847 related to Eupatorus birmanicus Arrow, 1908 from southwestern China (Coleoptera: Scarabaeidae: Dynastinae)
No full textFIGURES 6A–D. Parameres in frontal (A, C) and lateral (B, D) views. A, B, holotype of Eupatorus pyros Prandi & Grossi, new species; C, D, Eupatorus birmanicus Arrow, 1908.Published as part of Prandi, Massimo & Grossi, Paschoal C., 2021, A new species of Eupatorus Burmeister, 1847 related to Eupatorus birmanicus Arrow, 1908 from southwestern China (Coleoptera: Scarabaeidae: Dynastinae), pp. 29-40 in Zootaxa 4966 (1) on page 37, DOI: 10.11646/zootaxa.4966.1.3, http://zenodo.org/record/472936
Energy instability and overdetermined elliptic problems in cones and cylinders: an approach via domain variations
Full text linkIn this thesis, we study semilinear elliptic problems in domains
that are constrained to be inside a fixed unbounded open set C, with appropriate boundary
conditions. Our aim is to understand how the geometry of C selects domains in which
positive solutions of the equation have special properties, mainly related to notions of
symmetry. Our arguments are primarily based on analyzing how the energy of a positive
solution in a domain varies when the domain moves inside C. We first consider the case
where C is generic. We show how to define an energy functional T when the equation
possesses more than one solution and compute the domain derivative of T. In the case
when C is a cone or a cylinder, we show that some special domains may be unstable
as critical points to the energy shape functional. This opens room for the search for
nonsymmetric domains with the same special properties, to be found, for example, by
local minimization of the energy functional. This is done by analyzing the sign of the
second derivative of the energy functional to understand the stability/instability of its
critical domains. Furthermore, we show that in a special class of domains, namely bounded
cylinders, solutions other than the one-dimensional ones do exist, under fairly general
assumptions on the nonlinearity. This is accomplished by means of bifurcation theory
and Morse index comparison
Pancreatic metastasis from clear cell renal carcinoma 33 years after nephrectomy
No full textPancreas could be the metastatic site of recurrence of a previously resected clear cell renal carcinoma many years later. We report the case of a single metastasis at the pancreatic tail 33 years after the index nephrectomy. Because of the positive outcome after surgery, radical resection of both solitary and multiple metastases should be attempted in all surgically fit patients. (Cite this article as: Piccino M, Grossi U, Palumbo R, Pirozzolo G, D Alimonte L, Bonfiglio M, et al. Pancreatic metastasis from clear cell renal carcinoma 33 years after nephrectomy. Chirurgia 2023;36:98-101. DOI: 10.23736/S0394-9508.22.05450-X)
Eupatorus pyros Prandi & Grossi 2021, new species
No full textEupatorus pyros Prandi & Grossi, new species Figs 1A, C; 2A; 3A. Type locality: Liupanshui City, Mt. Jiu Cai Ping, Guizhou, China Type material (3 males). Holotype, dissected male (CERPE), labelled as follows: a) white typed label, “ Liupanshui City, Mt. Jiu Cai Ping, IV.2009, Guizhou, China, Gerhard Pross”; b) white typed label “Everardo & Paschoal C. Grossi coll.”; c) white typed label, “sp. nova?”; d) red typed label, “ Eupatorus pyros sp. nov. Prandi & Grossi 2021”. Paratypes, two dissected males (EPGC and MPC) with the same locality data as the holotype, and with yellow paratype label. Labels numbered, with a signature of the authors. Description of the holotype Measurements. L: 51.2 mm; TL: 51.4 mm; PL: 17.0 mm; PW: 20.3 mm; EL: 30.9 mm; EW: 25.9 mm; CL: 19.3 mm; TH: 7.3 mm; TW: 5.3 mm; TT: 2.2 mm. Color. Uniformly reddish-chestnut, scarcely shining, dark-chestnut only on cephalic and thoracic horns. Head, apex of pronotal horns, sutural stria of elytra shiny dark-chestnut as legs. Head. Cephalic horn long and projecting upwards in frontal view. In dorsal view, broader at base, gradually narrowed towards the sharp apex. In lateral view sinuous, S-shaped, convex from base to mid-length for an extension of 8 mm; concave at the middle for about 6 mm, then convex again to apex for 5 mm. Apex distinctly acute, and slightly directed backwards. Sides bordered with an evident rim from the base to the middle of the first section, defining a semi-triangular area; internally at the area with a distinct roughly, punctate-rugose pattern. Clypeus. Anterior margin bidentate, lateral angles bearing one robust tooth directed forwards. Mandibles. Width 5.8 mm, with sides upcurved. Antennae. Antennal club in dorsal view with a 2.4 mm width. Pronotum. Glabrous, smooth, reddish-chestnut, weakly shining. Anterior angles are sharply projected, sides parallel and directed forwards. Pronotal disc with a pair of spatulate horns, concave on anterior face, and convex on posterior face, dark-chestnut, internal margins almost touching each other. Scutellum. Subtriangular, with rounded angles, 4.4 mm long, 4.3 mm wide, coarsely punctate, lateral edges smooth. Elytra. Glabrous, reddish-chestnut, poorly shining, except for darker shiny punctuation around scutellum and elytral suture. EL/EW ratio 1.2. Elytra in lateral view not bulging, with a flat feature declining towards apex. L/EL ratio 1.7. Abdomen. Sternites with a glabrous area in the middle, sides of sternites covered with very fine, short, reddish pilosity. Legs. Fore tibia almost straight, inner margin slightly dilated inwards at apex, 13.1 mm in length. Anterior edge rounded inwards, just over first tarsomere. External sides of anterior tibiae with three teeth, subapical tooth longer than basal and apical; teeth sharp, triangular, pointing backwards. Inner apical spur curved downwards, shorter than basal tooth. Fore tarsus 11.8 mm long. Mesotibiae and metatibiae with many lateral sharp teeth, evolving in sharp spinae at tibial apex. Presence of sparse reddish pilosity, very reduced on fore tibiae. Aedeagus. In frontal view thin, subrectangular, reddish-brown, with parameres elongate and narrow. In lateral view equally slim, with a small phallobase (Figs 6A–B). Female. Unknown. Paratypes variation. Overall morphology very uniform. Proportionally to body, only slight variations. Measurements. L: 47.6–51.2 mm; TL: 50.1–51.4 mm; PL: 17.0– 17.2 mm; PW: 20.3–20.4 mm; EL: 30.1–30.9 mm; EW: 24.9–25.9 mm; CL: 19.3–21.4 mm; TH: 7.3–7.7 mm; TW: 5.3–6.3 mm; TT: 2.1–2.2 mm. Etymology. From the Ancient Greek word pyrós, which means fire, because of the particular shape of the horn that resembles the winding of a flame. Noun in apposition. Differential diagnosis. The peculiar “sinusoidal” shape of the cephalic horn is the most substantial character to separate E. pyros new species from E. birmanicus, where the horn is uniformly curved backwards. Furthermore, the shape and size of the thoracic horns in E. pyros new species prevents its misidentification with major males of E. birmanicus. In fact, height, width and thickness of thoracic horns are significantly lower in E. pyros new species. Measurements are clear: in a comparison with 15 specimens of E. birmanicus with the same L and EW as the holotype, the average length of thoracic horns measured from the upper middle of pronotum is of 10.9 mm for E. birmanicus against 7.49 mm for E. pyros (+45.5%); the average width is of 8.0 mm for E. birmanicus against 5.8 mm for E. pyros (+38%); the average thickness is 3.12 mm for E. birmanicus against 2.0 for E. pyros (+56%). Even the color proves the difference: E. pyros new species has a lighter overall color, and never shows a total-black pronotum as it happens in many specimens of E. birmanicus. See Table 1 for a detailed comparison of major males of E. pyros new species and E. birmanicus.Published as part of Prandi, Massimo & Grossi, Paschoal C., 2021, A new species of Eupatorus Burmeister, 1847 related to Eupatorus birmanicus Arrow, 1908 from southwestern China (Coleoptera: Scarabaeidae: Dynastinae), pp. 29-40 in Zootaxa 4966 (1) on pages 31-33, DOI: 10.11646/zootaxa.4966.1.3, http://zenodo.org/record/472936
Uniqueness of the critical point for semi-stable solutions in R2
Full text linkIn this paper we show the uniqueness of the critical point for semi-stable solutions of the problem {-Δu=f(u)inΩu>0inΩu=0on∂Ω,where Ω ⊂ R2 is a smooth bounded domain whose boundary has nonnegative curvature and f(0) ≥ 0. It extends a result by Cabré-Chanillo to the case where the curvature of ∂Ω vanishes
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