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Articles 4081 - 4110 of 4143

Full-Text Articles in Physical Sciences and Mathematics

Contribution À L'Etude De Bathynella D'Europe: Bathynella Natans Vejdovsky, Un Dilemme À Résoudre, Eugène Serban Jan 1966

Contribution À L'Etude De Bathynella D'Europe: Bathynella Natans Vejdovsky, Un Dilemme À Résoudre, Eugène Serban

International Journal of Speleology

After a minute study of the structure of the 8th male pereiopod in some Bathynella populations from Romania and England, the structure differences which were found allowed to identify two well individualized kinds of pereiopods; they were named type natans and type stammeri. Taking into account the striking differences between these two types, B. stammeri (Jakobi), which since 1954 is considered to be a subspecies of the natans species, was separated out of the species B. natans sensu Jakobi (1954). The populations understudied were collected in England and Romania, their minute study being the object of an other note, …

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Algological Studies In The Cave Of Mátyás Mount, Budapest, Hungary, Lajos Hajdu Jan 1966

Algological Studies In The Cave Of Mátyás Mount, Budapest, Hungary, Lajos Hajdu

International Journal of Speleology

Experiments were designed to test the ability of the aphotic speleoenvironment to support algal growth. The first series contained gelatin cultures of Scenedesmus placed in the cave at different localities in order to establish whether or not the microhabitats have any particular effect on the multiplication of the algae. No differences were found in the cultures after a three month incubation period in the cave, which could be traced to influences of microenvironmental conditions. Chlorella cultures in sterile Knop’s solution showed measurable growth in the cave whereas if the cultures were installed into sterilized cave water or were shielded by …

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Calcite-Aragonite Speleothems From A Hand-Dug Cave In Northeast Kansas, Frederic R. Siegel, Wakefield Dort Jr. Jan 1966

Calcite-Aragonite Speleothems From A Hand-Dug Cave In Northeast Kansas, Frederic R. Siegel, Wakefield Dort Jr.

International Journal of Speleology

Speleothems in the form of stalactites, linear stalactitic growths, flowstone, and crusts, from a hand-dug cave in Northeast Kansas (Sec. 2 NENW, T2S, R22E) are composed of calcite and aragonite. If the estimated age of the cave is correct, i.e., 150 to 200 years old, the stalactites have grown at a maximum rate of 0.20 to 0.15 millimetres per year along their vertical axes. All of the speleothems examined contain about one percent strontium (based on qualitative emission spectrograph analyses). Rate of supply and evaporation of the vadose waters may dictate whether aragonite or calcite is the polymorph that precipitates …

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Contribution À La Systématique Des Stenasellinae D'Afrique (Crustacés, Asellotes), Guy Magniez Jan 1966

Contribution À La Systématique Des Stenasellinae D'Afrique (Crustacés, Asellotes), Guy Magniez

International Journal of Speleology

From 1897 to 1962, many species have been described as belonging to the genus Stenasellus Dollfus. Among all these the forms from Central Africa and one of Western Africa are not conform to the generic description of Racovitza 1924 obliging us to institute two new genera, Metastenasellus and Parastenasellus. The archaeic Asellota belong to the genus Stenasellus Dollfus, Johannella Monod, Metastenasellus nov.gen. and Parastenasellus nov. gen. are thus grouped in a sub family of Stenasellinae and the relationship between the different groups has still to be explained.

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Contribución Al Conocimiento De Los Speophilus Del Grupo Kiesenwetteri Diek, Oleguer Escolà I Boada Jan 1966

Contribución Al Conocimiento De Los Speophilus Del Grupo Kiesenwetteri Diek, Oleguer Escolà I Boada

International Journal of Speleology

The author has studied the group kiesenwetteri of the genus Speophilus (Col. Catopidae), endemic of Catalogna (Spain). The paper comprises a geographical and geological analysis of the by this group colonised massifs, with a study on the geological isolation of the species and a faunistic study of the 5 actually known forms, one of which is new.

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Pelodrilus Bureschi Mich. 1924 (Oligochaeta Haplotaxidae Dans Les Grottes Du Banat (Roumanie), Francise Botea, Lazare Botoşaneanu Jan 1966

Pelodrilus Bureschi Mich. 1924 (Oligochaeta Haplotaxidae Dans Les Grottes Du Banat (Roumanie), Francise Botea, Lazare Botoşaneanu

International Journal of Speleology

Pelodrilus bureschi Mich., one of two species of limicolous oligochaetes strictly confined to a subterranean environment and previously known from several caves in Bulgaria and Yugoslavia, was recently found in three caves in the Banat Mountains, Romania. Examination of sexually mature worms showed that they are within the range of variability of P. bureschi and that there is no reason to describe a form peculiar to the caves of Banat. Pelodrilus has almost always been found in the mud or clay covering the bottom of pools of variable size, which are filled by periodic flooding of underground water courses. The …

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Hydracariens Souterrains De Bulgarie. I. Mideopsis (Nudomideopsis) Motasi N. Sp., Anelya Petrova Jan 1966

Hydracariens Souterrains De Bulgarie. I. Mideopsis (Nudomideopsis) Motasi N. Sp., Anelya Petrova

International Journal of Speleology

A new species of Mideopsis (Nudomideopsis) motasi n. sp. coming from a well near Gorni-Ciflik, close to Belogradchik in NW Bulgaria, is described. For the structure of the palp it is distinguished from the other subterranean European species Mideopsis (Mideopsis (Nudomideopsis) longipalpis Szalay and Mideopsis (Nudomideopsis) fonticola Tanasachi et Orghidan and resembles some Japonese Mideopsis species found also in wells.

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Remarques Sur L'Espèce Asellus Cavaticus Leydig (Crustacé Isopode Hypogé) Et Description D'Une Sous-Espèce Nouvelle, Jean-Paul Henry Jan 1966

Remarques Sur L'Espèce Asellus Cavaticus Leydig (Crustacé Isopode Hypogé) Et Description D'Une Sous-Espèce Nouvelle, Jean-Paul Henry

International Journal of Speleology

In Europe, Asellus cavaticus Leydig until 1963 was the only species known of a phyletic line that extended from Britain to Austria. Until the works of Racovitza in 1919 all the Asellus of the underground world were reported to this species, first known subterranean Asellus. The taxonomic criteria of Racovitza allowed to determine many subspecies. Later on Chappuis refuses to give names to the different encountered forms. Taking as type forms the individuals of the grotte de Sainte-Reine (Meurthe-et-Moselle), considered very similar to the original type forms, we think to be able to define a new subspecies puteanus for …

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Haptolana Trichostoma, A New Genus And Species Of Troglobitic Cirolanid Isopod From Cuba, Thomas E. Bowman Jan 1966

Haptolana Trichostoma, A New Genus And Species Of Troglobitic Cirolanid Isopod From Cuba, Thomas E. Bowman

International Journal of Speleology

Haptolana trichostoma, described from 2 specimens collected in a cave in Camaguey Province, Cuba, is distinguished especially by the expanded peduncle of antenna 1, the posteriorly directed mandibular palp, and in having all 7 pereopods prehensile. This is the second recorded occurrence of a troglohitic cirolanid in Cuba and the eighth species reported from the Western Hemisphere.

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Über Höhlenbewohnende Moose, László Vajda Jan 1966

Über Höhlenbewohnende Moose, László Vajda

International Journal of Speleology

Among the mosses collected by Dr. K. Verseghy in the caves of the environment of Lillafured Eucladium verticillatum (L.) Br. Eur. was found which had some peculiar bulbillae composed of two to many cells on the ends of the filaments. They may represent special reproductive organs as yet unknown in this genus. None of the mosses living in the caves developed sex organs.

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Algae From The Cave Of Mátyás Mount, Budapest, Hungary, P. Palik Jan 1966

Algae From The Cave Of Mátyás Mount, Budapest, Hungary, P. Palik

International Journal of Speleology

Seven collections containing scrapings of speleoclay or samples from the cave waters were received from L. Hajdu and were cultured in light in a modified Knop’s solution. The cultures yielded 21 different algal taxa, of which five species belong to the Cyanophyta four to the Bacillariophycaea class of the Chrysophyta and twelve to the Chlorophyta. From the species distribution, the cave shows a similarity to the nearby cave of Pàlvolgy, namely both of them contained more than 50 per cent Chlorophyta. Among the Cyanophyta the occurrence of Baradlaia speluncaecola Palik is noteworthy. This species seems to be a true troglobitic …

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Ephemeropteren Und Plecopteren Aus Bulgarischen Höhlen, Boris K. Russev Jan 1966

Ephemeropteren Und Plecopteren Aus Bulgarischen Höhlen, Boris K. Russev

International Journal of Speleology

The mayfly Ecdyonurus venosus (Fabr.) and the stonefly Perla marginata bureschi (Schoenemund) have been previously recorded from Bulgarian caves. The author has found the following additional species in the material collected by his colleagues in Bulgarian caves: Ephemeroptera - Habroleptoides modesta (Hagen), Paraleptophlebia tumida Bengtss. and Paraleptophlebia sp.; Plecoptera - Nemoura sp. and Dinocras cephalotes (Curtis). All these species are trogloxenes.

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Nouvelles Contributions À L'Ètude De Bathynella (Bathynella) Natans Vejd. Et Bathynella (Antrobathynella) Stammeri (Jakobi), Eugène Serban Jan 1966

Nouvelles Contributions À L'Ètude De Bathynella (Bathynella) Natans Vejd. Et Bathynella (Antrobathynella) Stammeri (Jakobi), Eugène Serban

International Journal of Speleology

In an earlier paper the author separated Bathynella stammeri (Jakobi) (formerly considered a subspecies) from B. natans Vejd. sensu Jakobi and showed that this new species justified the erection of a new subgenus (Antrobathynella) of Bathynella. Study of the morphology of the mandible, and the 8th pereiopod of the male and female, and examination of the chaetotaxy of the uropods have revealed new diagnostic characters which permit the unequivocal separation of B. natans and B. stammeri. A diagnosis of both species is given. The present study is the result of examination of numerous specimens from many …

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Sobre Bathysciinae Catalanes (Col. Catopidae), F. Español Jan 1966

Sobre Bathysciinae Catalanes (Col. Catopidae), F. Español

International Journal of Speleology

Elencation of Speonomus and Speophilus (Col. Catopidae) collected by different speleologists in relation with the Museum of Zoology of Barcelona in caves where no beetles had been found yet, completing the knowledge on cave Coleoptera on the Spanish side of the Pyrenees. The paper also contains the description of two new species (Speonomus aurouxi and Speophilus subilsi), and a short comment on Troglocharinus impelletierii Espaù. described as a race of hustachei Jeann., but different from this species by several characters that distinguish it very well, justifying its geographical isolation.

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Developpement Larvaire Du Serpulien Cavernicole Marifugia Cavatica Absolon Et Hrabe (Polychaeta, Sedentaria), Janez Matjašič, Boris Sket Jan 1966

Developpement Larvaire Du Serpulien Cavernicole Marifugia Cavatica Absolon Et Hrabe (Polychaeta, Sedentaria), Janez Matjašič, Boris Sket

International Journal of Speleology

Among material coming from Hercegovina some living trochoporae of the cave Serpulid Marifugia cavatica have been found. In the laboratory of the Biology Institute of Ljubljana the further development passing stages of metatrochophore and nectochaeta have been observed. The constitution of the trochophore is typical. The nectochaeta possesses three metamera and each of these has only one pair of setae. The nectochaeta once it gets attached to the bottom the neck and beginning of tentacles are beginning to develop. The tube, three pairs of simple tentacles and the opercula are formed in further stages. For the period in which the …

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The Genus Arrhopalites (Collembola: Sminthuridae) In The United States And Canada, Kenneth Christiansen Jan 1966

The Genus Arrhopalites (Collembola: Sminthuridae) In The United States And Canada, Kenneth Christiansen

International Journal of Speleology

The members of the genus Arrhopalites (Collembola Sminthuridae) found in the U.S. and Canada are described and illustrated. These include six previously described forms and seven new species: A. altus, A. clarus, A. bimus, A. bellingeri, A. dubius, A. hirtus, and A. amarus. Two forms known only from incomplete specimens are described, but not named. Nine of the species are found in caves, but only four of these are at present unknown from surface localities. The characteristics of the genus are described and discussed, and the genus Pseudarrhopalites Stach is placed in synonymy with Arrhopalites. New methods are …

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A Preliminary Study On The Effects Of Organic Pollution Of Banners Corner Cave, Virginia, John R. Holsinger Jan 1966

A Preliminary Study On The Effects Of Organic Pollution Of Banners Corner Cave, Virginia, John R. Holsinger

International Journal of Speleology

Four pools were observed in Banners Corner Cave, Russell County, Virginia, over a 28 month period from November 1961 to February 1964. Three of these pools were visibly polluted with sewage which had seeped into the cave from septic tanks located on the hill above. All four of these pools, at one time or another during the study, contained large populations of planarians, Phagocata subterranea Hyman and isopods, Asellus recurvatus Steeves. Physicochemical and microbiological analyses of the pool waters indicated that oxygen tension is a low as 2.8 mg./l. in one pool and that coliforms and other forms of bacteria …

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Eine Neue Niphargus-Art (Gammaridae, Amphipoda) Aus Bulgarien, Stoitze Andreev Jan 1966

Eine Neue Niphargus-Art (Gammaridae, Amphipoda) Aus Bulgarien, Stoitze Andreev

International Journal of Speleology

The author describes a new species, Niphargus toplicensis n. sp., of the spring «Toplitzata» near the village of Mussomischta (district of Goze Delcev). N. toplicensis n. sp. Is closely related to N. aquilex moldacicus Dobreanu, Manolache and Puscariu, 1953, N. smederevanus Karaman, 1950, N. anatolicus Karaman, 1950, N. pancici Karaman, 1929, N. pancici clkanovi Karaman, 1959 but differs for several characters (a greater number of setae on the internal lobe of maxilla I, the coxal plates longer than their width, different armour of the telson and of the uropods I etc.).

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Hommage À La Mémoire De René Jeannel, Constantin Motas Jan 1966

Hommage À La Mémoire De René Jeannel, Constantin Motas

International Journal of Speleology

In this paper the author evokes the principal stages of activity in the life of the great French speleologist, René Jeannel. He records the admiration and respect attributed to Jeannel in the field of entomology. Emphasis is given to the work of Jeannel at Cluj, Romania, carried on with E. G. Racovitza and P. A. Chappuis. A summary is made of Jeannel’s many travels. The significant conclusions of these are presented as well as an insight into the character of this prominent French naturalist.

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Description D'Un Piége À Niphargus, François Graf Jan 1966

Description D'Un Piége À Niphargus, François Graf

International Journal of Speleology

The description of a trap permitting the capture of Niphargus in deep waters is given. No handling or surveillance is necessary. The amphipods are caught automatically.

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Hurleya Kalamundae N.G.N.Sp. (Amphipoda, Gammaridae) From Subterranean Waters Of Western Australia, Milan Straškraba Jan 1966

Hurleya Kalamundae N.G.N.Sp. (Amphipoda, Gammaridae) From Subterranean Waters Of Western Australia, Milan Straškraba

International Journal of Speleology

A new genus and species of freshwater Gammaridae (Amphipoda) from subterranean waters of Western Australia is described, Hurleya kalamundae n. g. n. sp. The genus apparently represents an aberrant line of the Crangonyx group of Gammaridae.

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Diptéres Cavernicoles Recueillis En Bulgarie, Anca Burghele-Balacesco Jan 1966

Diptéres Cavernicoles Recueillis En Bulgarie, Anca Burghele-Balacesco

International Journal of Speleology

We present the list of the Limnobiidae, Mycetophilidae, Anthomyidae and Helomyzidae species collected in the caves of Bulgaria, most part on occasion of the third international speleological expedition.

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Notulae Orthopterologicae Xxi - Le Dolichopoda Della Francia E Della Spagna, Baccio Baccetti Jan 1966

Notulae Orthopterologicae Xxi - Le Dolichopoda Della Francia E Della Spagna, Baccio Baccetti

International Journal of Speleology

The revision of French-Iberian Dolichopoda has led to the identification of four different species of Dolichopoda s. str. One of these (D. azami) seems to have a large geonomy in the French Alps and it had already been noticed in Italy, too. A second species (D. chopardi m.), still new to science, seems to be restricted to the Maritime Alps; the third and the fourth (D. linderi and D. bolivari), already well known, seem to be localized in the Pyrenees and the Cevennes. Owing to their morphological characters Dolichopoda azami and chopardi constitute a very …

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Les Crustacés Du Réservoir De La Fontaine Des Suisses À Dijon, Bernard Dussart, François Graf, Roger Husson Jan 1966

Les Crustacés Du Réservoir De La Fontaine Des Suisses À Dijon, Bernard Dussart, François Graf, Roger Husson

International Journal of Speleology

Inventory of the Crustaceans collected in the basin of the Fonatine des Suisses at Dijon. The Copepoda are represented by 5 species: Macrocyclops albidits, Eucyclops serrulatus in two slightly different forms, Eucyclops serrulatus var. mihi, Acanthocyclops venustus, Acanthocyclops vernalis and Acanthocyclops robustus. The coexistence of these two last forms in this very tiny environment makes it probable that we have here to do with two distinct species. A determination key is given for the Genus Acanthocyclops. Amphipoda are represented by Niphargus virei and especially Niphargus kochianus kochianus of which more than 100 samples have been …

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Daten Zur Kenntnis Der Algenflora Der Höhle Kölyuk Von Mánfa, George Claus Jan 1965

Daten Zur Kenntnis Der Algenflora Der Höhle Kölyuk Von Mánfa, George Claus

International Journal of Speleology

The Kolyuk cave lies in the southern part of Hungary in the Mecsek Mountains, about 3 km. in distance from the village of Mànfa. The material accepted for investigation originated from a recently discovered and until now completely entombed part of the cave. It was collected by the geologist Gàbor Magyari and consisted of material scraped from the walls and ceiling of a cavity in the cave, which could be reached only by underwater swimming. From these scrapings cultures were installed with sterile Knopp solution and after the algae present in the collection reproduced, a diversified flora developed which consisted …

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Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry Jan 1965

Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry

International Journal of Speleology

The cavernicole asellid Asellus cavaticus Leydig has been reared in our laboratory for more than twenty months, permitting us to give some data on the sexual cycle of this species. Females provided with brood pouches seem to be more numerous in the spring, as is the case with the subterranean amphipod Niphargus virei Chevreux. The average length of the incubation period seems much shorter than that of other troglobitic species such as Niphargus virei Chevreux or Caecosphaeroma burgundum Dollfus, so that the life cycle of our species is nearer to that of epigean Asellus. The number of young per …

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Grottes Du Banat (Roumanie) Explorées En 1963, Stefan Negrea, Alexandrina Negrea, V. Sencu, Lazare Botoşaneanu Jan 1965

Grottes Du Banat (Roumanie) Explorées En 1963, Stefan Negrea, Alexandrina Negrea, V. Sencu, Lazare Botoşaneanu

International Journal of Speleology

The paper contains the description of 23 natural or artificial underground cavities in the Banat mountains, grouped in karst zones. It is in all respects a continuation of a preceding volume (Botosaneanu, Negrea & Negrea,1963) on the caves of the Romanian Banat.

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Diatoms From Mammoth Cave, Kentucky, Sam L. Van Landingham Jan 1965

Diatoms From Mammoth Cave, Kentucky, Sam L. Van Landingham

International Journal of Speleology

Samples collected in Mammoth Cave, Kentucky, revealed the presence of a diversified but not too abundant diatom community in the cave. As the material was not subjected to culturing experiments but was investigated immediately after arrival, both in native and permanent preparations, it was possible to: 1. ascertain that the majority of the diatoms contained well developed, apparently healthy and functioning chloroplasts and 2. to get a rough estimate of the actual number of specimens present in a microhabitat. The identifications resulted in the recognition of 16 diatom taxa of which possibly 4 are new to science. Further studies are, …

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Östliche Gruppe Der Monolistrini (Crust., Isoopoda): Ii.Biologischer Teil, Boris Sket Jan 1965

Östliche Gruppe Der Monolistrini (Crust., Isoopoda): Ii.Biologischer Teil, Boris Sket

International Journal of Speleology

Following the first systematic part, in this paper the author describes the biological observations made on these Isopod Crustaceans of underground waters. The different sexual characters of the particular groups and the related differences in the behaviour before copulation are described. During the embryonic and larval development small differences between sub-genus are reported. To the differences in Caecospaeroma (according to Daum) the first and second “mancastadium” and another “postmanca stadium” with pereiopods VII not wholly formed have to be added. The author describes the growth of the different parts of the corps and the extremities, comprising the sexual characters.

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Les Chauves-Souris Cavernicoles De La Suisse, Villy Aellen Jan 1965

Les Chauves-Souris Cavernicoles De La Suisse, Villy Aellen

International Journal of Speleology

Bats, familiar to speleologists, play an important part in animal ecology in caves. Indirectly by their guano, they provide a source of food for numerous cave-dwelling animals and directly, by their own more or less constant presence. 26 species of bats are known from Switzerland, 15 of which occur in caves. Miniopterus schreibersi is considered the only true cave-dweller. The exact distribution of the rare species, including those occurring outside caves, is found in the text and is also indicated on the accompanying maps.

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