A new mayfly species,
Sparsorythussescarorum
sp. n.
(Tricorythidae) is described from Mindoro Island, Philippines. Nymphs are characterized by the combination of the following characters: compound ...eyes of approximately equal size in both sexes, shape and setation of legs, presence of rudimentary gills on abdominal segment VII, and some details of mouthparts. Male imagines are characterized by the coloration pattern of wings and details of genitalia. The developmental stages are matched by DNA barcodes.
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Four species of Ephemerythus Gillies 1960 are described here. Larvae, subimagoes, imagoes of both sexes and eggs of Ephemerythus niger Gillies 1960 (= E. niger ugandanus Kluge 2010 syn. n.) and ...Ephemerythus pictus Gillies 1960 (= E. kiboensis Gillies 1960 syn. n.) are redescribed based on reared material from their type localities (Amani in Usambara Mountains and Marangu in Kilimandjaro respectively) and from other places in Tanzania. Larvae, subimagoes, imagoes of both sexes and eggs of a new species Ephemerythus nigricolor sp. n. are described based on reared material from Zambia. The species formerly reported as «Ephemerythus sp. C» (Kluge 2010a) is described here as Ephemerythus gilliesi sp. n., based on one larva with eggs, collected by M.T. Gillies in Cameroon.
Larvae, subimagoes, imagoes of both sexes and eggs of Tricorythus furcifer sp.n. and T. tener sp.n. are described based on reared material from Zambia. Larvae of both species closely resemble larvae ...of T. varicauda (Pictet 1843), while genitals of male imagoes are different, being especially unusual in T. furcifer. A new locality for Tricorythus tinctus Kimmins 1956 is recorded in Zambia.
A cladistic analysis of the South American members of the Ephemeropteran family Leptohyphidae is presented. A matrix of 73 taxa and 124 morphological characters was analysed under two distinct ...weighting criteria (implied weighting, which weights characters as a whole, and self‐weighted optimization, which differentially weights character state transformations). To assess the monophyly of the Leptohyphidae, representatives of Ephemerellidae, Ephemerythidae, Machadorythidae, Teloganodidae, Tricorythidae, Coryphoridae and Melanemerellidae were also included. Trees were rooted in Ephemerellidae. Conspicuous differences in consensus topology occur when transformation costs among character states are weighted (including asymmetries). The differences in the assessments of character reliability in the two weighting criteria used are discussed. In many cases, self‐weighting, in allowing for asymmetries in transformation costs, considered many of the character state transformations as more reliable (= informative) than implied weights (which needlessly down‐weighted the whole character). The results confirm the monophyly of Leptohyphidae and support its sister‐group relationship with Coryphoridae. The shortest trees do not support the recently proposed division of Leptohyphidae into two subfamilies. Ephemerelloidea higher classification is discussed briefly.
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Biological and hydrological data collected from 1984 to 1998 in three Guinean rivers were analysed to evaluate adverse effects of biological and chemical larvicides applied for the control of ...blackfly Simulium damnosum, vector of the parasitic digenean worm Onchocerca volvulus. Although most of the variation in invertebrate populations were flow-related, larvicide applications affect community structure reducing the abundance of the most sensible taxa. In spite of these results, in the long term the rarefaction of some invertebrate taxa (i.e. Tricorythidae) does not cause a significant reduction of total invertebrate densities because of the corresponding increase of other taxa (i.e. Hydropsychidae and Philopotamidae). The functional structure of the communities is also not affected.PUBLICATION ABSTRACT
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Many of us, at least some from former generations, remember and have anecdotes of "the good old guys": scientists that are generous, supportive, knowledgeable, and approachable. Unfortunately, the ...hunt for the precious gold of points for evaluations, such as number of publications, has often altered that harmony and made generous scientists a scarce resource for future generations of biologists. We are lucky to have met and still have around active entomologists of that valuable generation, like Dr. Santiago Zaragoza-Caballero. We, gladly and respectfully, dedicate this modest contribution to him.
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Chlorate is a by-product of chlorine dioxide bleaching processes. Five species of insects, Isoperla transmarina, Baetis tricaudatus, Tricorythodes minutus, Dasycorixa hybrida and Haliplus sp. were ...exposed to 5, 50 or 100 mg per litre chlorate for 10 d. The plecopteran Isoperla longiseta was exposed to 0.5, 5 or 50 mg chlorate per litre for 10 d. Exposure to chlorate had no effects on insect survival. A 48-h acute toxicity test was conducted to determine the toxicity of chlorate to Daphnia magna. The LC50 value was 3162 mg per litre. Water samples were collected from the Wapiti /Smoky river system in Alberta, Canada, to determine background levels of chlorate in the ecosystem and to determine chlorate concentrations from secondary treated effluent discharged by the bleached kraft pulp mill near Grande Prairie. Chlorate was not detected upstream of the mill but was present at levels up to 3.25 mg per litre 25 km downstream.
The mayfly genus Teloganella Ulmer was originally described from a female subimago. Adults (both sexes) and larvae of Teloganella Ulmer collected in Malaysia form the basis of the first descriptions ...of the larva, adult, and egg of T. umbrata Ulmer and of the genus. Although Teloganella has historically been placed in the family Ephemerellidae and subfamily Teloganodinae, characteristics of larval forefemoral armature, male adult compound eyes, orientation of ICuA in the forewings, shape of adult tarsal segment 3, and male genitalia forceps segmentation strongly suggest placement in the family Tricorythidae, where it is classified here. Traditional ephemerellid characteristics of detached marginal venation in the forewings and the presence of dorsal abdominal tubercles in the larvae are found in Teloganella but are not reliable indicators of relationships. Teloganella is not placed in any subfamily because resolution of the exact phylogenetic relationships of subgroups in Ephemerellidae and Tricorythidae require further cladistic analysis.
Newly discovered mayflies from Madagascar have proven to represent a new genus and species of Tricorythidae. Provonshaka n. gen. is described in the larval stage, and compared with the Madagascar ...genus Manohyphella, which is also shown to be a member of the Tricorythidae. Provonshaka is a member of a phylogenetic lineage that also contains Manohyphella and the southeast Asia genus Teloganella. There are presently three tricorythid genera present in Madagascar, including the distantly related Tricorythus. Provonshaka thomasorum n.sp. is described from three rivers in Madagascar and is sometimes found cohabiting with Manohyphella keiseri. A diagnostic table giving the differences between Provonshaka and Manohyphella is provided.
Des éphémères malgaches récemment découverts appartiennent à un genre nouveau et à une espèce nouvelle de Tricorythidae. Provonshaka n.gen. est décrit à l'état larvaire, et est comparé au genre malgache Manohyphella, dont l'appartenance aux Tricorythidae est aussi prouvée. Provonshaka fait partie d'une lignée phylogénétique comprenant aussi Manohyphella et le genre Teloganella d'Asie du Sud-Est. Trois genres de Tricorythidae sont actuellement connus de Madagascar, y compris le genre plus éloigné Tricorythus. Provonshaka thomasorum n.sp. est décrite de trois rivières malgaches et peut cohabiter avec Manohyphella keiseri. Une table de diagnose résumant les caractères différentiels entre Provonshaka et Manohyphella est présentée.
Aquatic biodiversity of Madagascar : 8. Spinirythus, a new genus of Tricorythidae (Ephemeroptera Pannota). The study of the male genitals allows the authors to describe a new genus of Tricorythidae ...(Ephemeroptera Pannota) named Spinirythus. This new genus includes three species : S. martini n. sp., S. colasi n. sp., S. rosae n. sp. The male genitals allow to classify this genus in the Madecassorythinae Elouard & Oliarinony, 1997, sub-family endemic from Madagascar.
L'étude des génitalia des imagos mâles permet aux auteurs de décrire le nouveau genre de Tricorythidae Spinirythus (Ephemeroptera Pannota). Il comprend trois espèces : S. martini n. sp., S. colasi n. sp., S. rosae n. sp. L'appareil génital mâle permet d'assigner ce genre à la sous-famille des Madecassorythinae Elouard & Oliarinony, 1997, endémique de Madagascar.
Oliarinony Ranalison, Elouard Jean-marc, Raberiaka Haingonirina Nanoa. Biodiversité aquatique de Madagascar : 8 - Spinirythus, un nouveau genre de Tricorythidae (Ephemeroptera Pannota). In: Bulletin de la Société entomologique de France, volume 103 (3), août 1998. pp. 237-244.
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