891 research outputs found
Bilinear Forms on the Green Rings of Finite Dimensional Hopf Algebras
No full textIn this paper, we study the Green ring and the stable Green ring of a finite dimensional Hopf algebra by means of bilinear forms. We show that the Green ring of a Hopf algebra of finite representation type is a Frobenius algebra over Z with a dual basis associated to almost split sequences. On the stable Green ring we define a new bilinear form which is more accurate to determine the bi-Frobenius algebra structure on the stable Green ring. We show that the complexified stable Green algebra is a group-like algebra, and hence a bi-Frobenius algebra, if the bilinear form on the stable Green ring is non-degenerate.The authors would like to thank the referees for their careful reading of this article and for valuable comments. The first author was funded by Postdoctoral Science Foundation of China (Grant No. 2017M610316), the second author was funded by the NSF of China (Grant No. 11871063).Wang, ZH (reprint author), Taizhou Univ, Dept Math, Taizhou 225300, Peoples R China.
[email protected]; [email protected]; [email protected]
Supplemental material for Benign and malignant skull-involved lesions: discriminative value of conventional CT and MRI combined with diffusion-weighted MRI
No full textSupplemental material for Benign and malignant skull-involved lesions: discriminative value of conventional CT and MRI combined with diffusion-weighted MRI by Zhanhai Tu, Zebin Xiao, Yingyan Zheng, Hongjie Huang, Libin Yang and Dairong Cao in Acta Radiologica</p
Parapentacentrus fuscus Gorochov 1988
No full textParapentacentrus fuscus Gorochov, 1988 Parapentacentrus fuscus Gorochov, 1988: 23 Holotype information. Type locality: Asia-Tropical, Indo-China, Vietnam, Vinh Phu Province, Tam Dao National Park (not examined). Materials examined. China: male, Fujian, Wuyi Mountain, 16-v-2004, Caixia Yuan & Jing Li coll.; male, Hongkong, Damao Mountain, 9-v-2018, Libin Ma coll.; 6 males, Guangxi, Jinxiu, Shengtang Mountain, 28-iv- 2019, Libin Ma & Tao Zhang coll.; 5 males, Zhejiang, Suichang, Jiulong Mountain, 25-v-2019, Yun Bu coll.; male, Xizang, Motuo, Beibeng, 31-v-2019, Libin Ma coll.; 2 females, Fujian, Wuyi Mountain, 16-v-2004, Caixia Yuan & Jing Li coll.; 9 females, Guangxi, Jinxiu, Shengtang Mountain, 28-iv-2019, Libin Ma & Tao Zhang coll.; 3 females, Zhejiang, Suichang, Jiulong Mountain, 25-v-2019, Yun Bu coll.; female, Xizang, Motuo, Beibeng, 31-v-2019, Libin Ma coll.. Description. Male. Head small, slightly wider than pronotum. Occiput narrowed, smooth and convex. Median ocellus smaller than lateral ocelli and laterally expanded. Antennal scape somewhat square and wider than half width of rostrum. Labrum apical margin somewhat rounded. Terminal maxillary palpus truncated and widened, longer than 3rd palpus. Terminal labial palpus rod-like, longer than total length of remaining palpi. Pronotum almost oblong, apical and basal margins nearly similar in width, basal margin straight and apical margin almost straight, they both pilose. Forewing long and narrow, exceeding the apex of abdomen; basal field armed with 4 longitudinal veins which oblique and paralleled; lateral field bearing 4 longitudinal veins (not counting branch vein). Fore tibia armed with a small external tympanum and very large oval internal tympanum. Hind tibia possessing dorsal spurs numbered 5:4 (inner: outer). Hind tarsus armed with dorsal short spines and numbered 7:8 (inner: outer). Metanotal gland intraspecific varied. Of light brown individuals: the middle of anterior margin upward curved; posterior margin ornamented with rhombus and concavity medially, and a large round or square lateral vesicle in each side (Figs. 16A, B). Of dark brown ones: the middle of anterior margin upward curved; posterior margin ornamented with rhombus and concavity medially, and a small round lateral vesicle in each side (Figs. 16C, D). In previous study, Gorochov (1997) indicated that P. fuscus bearing small rounded vesicles and those large, round or square vesicles should be of the species of P. lineaticeps (?= P. formosanus), but we observed both of types in one species, P. fuscus. Anterior part of anal plate wide and inward concave medially, posterior part bearing two processes shaped as fold line and ornamented with hairs (Figs. 16 E–H). Male genitalia (Fig. 17). Of epiphallus, middle lobes very small, lateral lobes rather large and inferior margin inclined; accessory structure of epiphallus vimineous with apex curved outward and hooklike. Ectoparameres long and curved proximally, apical part slightly narrowed with short spines. Female. Similar to male (Figs. 15A, C). Coloration. Coloration changed in individuals. Some individuals are colored dark brown. In dark ones, the head is colored dark brown and ornamented with white stripes. Their pronotal disc and hind wing colored dark brown and the legs colored dark brown with light brown spots. Others were colored light brown. Head colored light brown and ornamented with white stripes, pronotal disc and hind wings light brown; legs light brown with dark brown spots. Measurements. Male (n=14). BL 17.04±1.89, HW 2.73±0.77, PL 1.66±0.64, PW 3.27±0.85, FWL 13.76±1.45, HWL 4.41±0.79, HFL 7.62±1.43, HTL 5.58±1.01, HML 4.32±0.68. Female (n=15). BL 17.08±2.34, HW 3.09±0.80, PL 1.69±0.43, PW 3.43±0.62, FWL 13.98±1.65, HWL 5.09±0.62, HFL 7.52±1.14, HTL 6.50±1.19, HML 4.44±1.15, OL 7.52±0.61. Remarks. Since Gorochov compared the type of this species with a paratype of P. lineaticeps (?= P. formosanus) (Gorochov, 1988, 1997), we believe that they are different species. But we doubt that there would be an incorrect identification on material collected from China, which were mentioned in Gorochov’s works. He discussed three specimens collected from Guangdong Province, China (three females, China, Prov. Guangdong, Guangzhou ‘Canton’, Mell S.V., deposited in Natural Museum of Humboldt University, Berlin) and he identified two of them which bear dark coloration as P. fuscus and one colored light as P. lineaticeps (?= P. formosanus) (Cigliano et al., 2020; Gorochov, 1988, 1997). All specimens we collected in China (see details in materials examined above) were identified as P. fuscus by features of male genitalia (accessory structure of epiphallus of this species armed with hook-like apex) and they are vary in coloration, of them some ones are colored dark while others colored light. Thus, we do not think it was correct to identify those three females (in Natural Museum of Humboldt University) based on their coloration and, to a great extent, we think they are probably the same species as we have here. In addition, there is a problem on illustrations of P. lineaticeps (?= P. formosanus) in Gorochov (1997: Figs 169–178), since these figures were drawn based on specimens of Province Vinh Phu, Vietnam but not the type specimen. If the author did not check the genitalia of them and only judged them by their coloration, we could assume these specimens bear light coloration should not be the species of P. lineaticeps (?= P. formosanus). But, in this case, how do we understand the difference, such as structure of metanotal gland, between species of P. fuscus and P. lineaticeps (?= P. formosanus) as indicated in Gorochov (1997). Our male specimens possess similar genitalia and they vary not only in coloration (Fig.15) but also in structure of metanotal gland (Fig. 16). Thus, we still believe it is reliable to use genitalia features to identify the species of the genus, but, at least for now, not coloration and some others mentioned in literature (Gorochov, 1997).Published as part of He, Zhixin & Ma, Libin, 2021, Crickets of the subfamily Itarinae Shiraki, 1930 (Orthoptera: Gryllidae) from China with description of a new species and distribution and critical notes on other species, pp. 382-408 in Zootaxa 4942 (3) on page 404, DOI: 10.11646/zootaxa.4942.3.4, http://zenodo.org/record/460436
Progoniogryllus directus Ma & Jing & Zheng 2021, sp. nov.
No full text<i>Progoniogryllus directus</i> sp. nov. <p> <b>Type materials.</b> <b>Holotype. Male. China:</b> Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU). <b>Paratype. China:</b> 2 males, Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU); 1 male, Xizang, Chayu, Xiachayu, vi-6-2019, Ma, Libin coll. (SNNU); 2 males, Xizang, Chayu, vi-13-2019, Yang, qichen coll. (SNNU); 2 females, Xizang, Chayu, Zhala village, vi-5-2019, Ma, Libin coll. (SNNU); 3 females, Xizang, Chayu, Xiachayu, vi-6-2019, Ma, Libin coll. (SNNU).</p> <p> <b>Measurements. Male (n=5):</b> BL 8.8±0.42, HL 1.37±0.08, HW 2.24±0.22, PL 1.83±0.07, PW 2.76±0.06, FWL 4.92±0.50, FWW 3.35±0.10, MTL 2.32±0.13, HFL 5.98±0.23; <b>female (n=2):</b> BL 8.21±0.34, HL 1.29±0.15, HW 2.19±0.04, PL 1.67±0.52, PW 2.69±0.07, MTL 2.61±0.15, HFL 6.22±0.17, OL 6.15±0.22</p> <p> <b>Description. Male.</b> Body smaller than medium species of Gryllinae (Fig. 7A, B). In frontal view, head laterally widened and dorsoventrally short, and vertex broad and flat (Fig. 9B). In dorsal view, head longer than pronotum; occiput widened and slightly convex; vertex inclined; and frons somewhat convex, wide and slightly wider than antennal scape. Antennal scape transverse, shield-like. Epistomal suture shallow, sinuate and medially upward convex. Lower portion of clypeus and labrum depressed. Labrum broad with lateral margins rounded convex and apically arched. End section of maxillary palpus obviously longer than the third; end section of labial palpus conspicuously longer than the total length of remainder two. Pronotum transverse and slightly longer than the half width. Disc of pronotum broad and flattened, anteriorly concave and posteriorly straight, and lateral margin straight and inclined down. Lateral lobes of pronotum broad and flattened with ventral surface slightly inwardly concave. Tegmina very short and not reaching abdominal tip. Tegminal disc broad and flattened, almost rectangular-shaped, slightly arched laterally and pointed rounded apically. Basal field short and slightly longer than 1/3 length of pronotum. Oblique veins two; diagonal vein weakly arched and smoothly jointing with outside margin of mirror. Mirror transverse, somewhat shaped as rhombus with inner and bottom corner rounded. Dividing vein separating a small oval at mirror bottom. Apical field distally straight, very short and shorter than 1/3 length of mirror. Cercus thin and tapering. Outer tympana large and long oval-like; inner tympana very small and oval-like. Hind femur slightly longer than tibia. Subapical spurs six pairs and proximally possessing an additional small one outside. Hind tarsus armed with two rows of spines and numbered more outside.</p> <p>Body colored dark brown dorsally and yellowish-brown ventrally. Occiput ornamented with six yellowishbrown stripes (Fig. 9B). Of them, the outermost ones inclined outward and jointing with yellowish-brown stripes above eyes. Yellowish-brown ornamented above eyes or around ocelli. Occiput, vertex, top portions of frons and inner margin of antennal socket dark brown. Eyes and portions between antennal socket and labrum, including mandible, maxillary and labial palpi yellowish-brown. Pronotum dark brown dorsally and only ornamented with few of yellowish-brown spot laterally. Lateral lobes of pronotum colored yellowish-brown at half lower portions. Elytra yellowish brown with lateral lobes colored dark.Abdomen colored dark brown dorsally and laterally, and yellowishbrown ventrally. Subgenital plate brown. Legs yellowish-brown and ornamented with few of brown spots.</p> <p>Epiphallus transverse (Fig. 8A–C), median lobe weakly convex and truncate apically; lateral lobes short and obtuse, in dorsal view, gap between them large and rectangular-like. Ectoparamere prismatoidal, proximally branched with outside branch thick and inner one thin, and combined as one apically.</p> <p> <b>Female.</b> Body form and coloration similar with male (Figs. 7C, D; 9A). Brachypterous individual armed with elytra bud-like (Fig. 7C). Ovipositor (Fig. 4A, C) yellowish-brown.</p> <p> <b>Etymology.</b> The name refers to its elytra armed with straight margin apically.</p> <p> <b>Remarks.</b> Inner tympana varied, sometimes pit-like and without tympanic membrane and sometimes with a very small tympanic membrane. This species possesses straight apical end of elytra.</p>Published as part of <i>Ma, Libin, Jing, Xuan & Zheng, Yanna, 2021, Integrative taxonomy base on morphology and molecular phylogeny with description of a new genus, Progoniogryllus gen. nov. and two new species (Orthoptera: Grylloidea: Gryllidae; Gryllinae), pp. 523-536 in Zootaxa 4995 (3)</i> on pages 534-535, DOI: 10.11646/zootaxa.4995.3.7, <a href="http://zenodo.org/record/5057465">http://zenodo.org/record/5057465</a>
Gryllotalpa
No full textKey to the known species of Gryllotalpa from China (not including two species, Gryllotalpa formosana Shi- raki and Gryllotalpa dentista Yang, from Taiwan Island) 1. FWs greater than 10 mm, hind wings long, distinctly extending to the apex of hind femur............................ 2 - FWs less than 10 mm, hind wings vestigial, covered by FWs................................................... 3 2. Ventral margin on outside of fore femur with a deep notch in its distal part, hind tibiae with 0–2 dorsal spurs on internal side.............................................................................. Gryllotalpa unispina Saussure - Ventral margin on outside of fore femur normally formed, hind tibiae with 3–4 dorsal spurs on internal side......................................................................................... Gryllotalpa orientalis Burmeister 3. FWs less than 6 mm................................................................................... 4 - FWs greater than 6 mm................................................................................. 5 4. Smaller (BL 21 mm), FWs normal, with c 1 and c 2................................. Gryllotalpa jinxiuensis You et Li - Slightly large (BL 27 mm), FWs nearly rounded when flattened, only with c 1 but c 2........ Gryllotalpa cycloptera sp. nov. 5. Much smaller (BL 18 mm).................................................. Gryllotalpa breviabdominis sp. nov. - Median size (BL more than 20 mm)....................................................................... 6 6. Cells c 1 and c 2 of tegmen closed........................................... Gryllotalpa wudangshanensis Li et al. - Cells c 1 and c 2 of tegmen opened distally.................................................................. 7 7. Body brownish, tegmen slightly larger (FWL 8.3, FWW 2.8)........................... Gryllotalpa mabiana Ma et al. - Body dark brownish, tegmen somewhat small (FWL 7.8, FWW 2.2)..................... Gryllotalpa henana Cai et NiuPublished as part of Ma, Libin & Zhang, Yalin, 2011, Redescriptions of two incompletely described species of mole cricket genus Gryllotalpa (Grylloidea; Gryllotalpidae; Gryllotalpinae) from China with description of two new species and a key to the known Chinese species, pp. 41-48 in Zootaxa 2733 on page 42, DOI: 10.5281/zenodo.20242
Turanogryllus koshunensis
No full textTuranogryllus koshunensis (Shiraki, 1911) Gryllodes koshunensis Shiraki, 1911: 61 Gryllopsis koshunensis, Chopard, 1967: 33 Velarifictorus koshunensis, Kim, 2012: 144 Turanogryllus koshunensis, He, 2018: 529 Holotype information. Type locality: China, Taiwan, Koshun. Deposited at Taipei University, Taiwan, China (not examined). Remarks. This species seems to be based on the fact that Shiraki compared this species with Velarifictorus asperses (= Gryllodes berthellus Saussure, 1877) (Walker, 1869) when he established it. Dr. Kim, Tae-Woo and Dr. Yang, Jeng-Tze considered it a species of Velarifictorus in their personal communication (Kim, 2012). Orthoptera species file online (Cigliano, et al., 2021) presents a series of photos of the holotype deposited in Taipei University. According to those pictures and morphological characters, both He (2018) and I think it should be in Turanogryllus. When note that T. eous, was mentioned by Bey-Bienko (1956) and indicated the species under the name Gryllodes koshunensis from Taiwan Island is outwardly similar to T. eous.Published as part of Ma, Libin, Zheng, Yanna & Qiao, Min, 2021, Revision of Chinese crickets of the tribe Modicogryllini Otte & Alexander, 1983 with notes on relevant taxa (Orthoptera: Gryllidae; Gryllinae), pp. 227-252 in Zootaxa 4990 (2) on page 245, DOI: 10.11646/zootaxa.4990.2.2, http://zenodo.org/record/502619
Turanogryllus eous Bergfy-Bienko 1956
No full textTuranogryllus eous Bey-Bienko, 1956 (Figs. 14A–C; 15A) Turanogryllus eous Bey-Bienko, 1956: 221; Randell, 1964 (1964): 1571 Turanogryllus melasinotus, synonymsed by Yang, et al., 2019: 18 Gryllodes koshunensis, Hsu, 1931: 23; Chopard, 1968: 36 Holotype information. Type locality: holotype collected from Wushan, Qingdao, Shandong, China; paratype collected from Liaoning, Beijing and Jiangsu. Holotype and paratype deposited at the Zoological Institute of Russian Academy of Sciences, St. Petersburg, Russia and two paratypes deposited in the Institute of Zoology Chinese Academy of Sciences, Beijing, China (not examined). Materials examined. 2 males, Shandong, Ningjin, ix-9–21-1993, Jin, Xingbao et al. coll. (SEM); 1 male, holotype of T. melasinotus, Shaanxi, Yangxian, Wanniuba, viii-31-1994, Li, Kai coll. (SNNU); 1 male, Wuhan, Huangpi, Sushansi, viii-14-2019, Shen, Zihao coll. (SNNU).Published as part of Ma, Libin, Zheng, Yanna & Qiao, Min, 2021, Revision of Chinese crickets of the tribe Modicogryllini Otte & Alexander, 1983 with notes on relevant taxa (Orthoptera: Gryllidae; Gryllinae), pp. 227-252 in Zootaxa 4990 (2) on page 245, DOI: 10.11646/zootaxa.4990.2.2, http://zenodo.org/record/502619
Geochronological and geochemical constraints on formation of the Tongling metal deposits, middle Yangtze metallogenic belt, east-central China
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