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Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
The Occurrence Of The Troglobitic Amphipod, Stygobromus Tenuis Tenuis (Smith) (Crangonyctidae) In The Taconic Mountains Of Southwestern Massachusetts (Usa): A Case For The Existence Of A Subterranean Refugium In A Glaciated Region, Douglas G. Smith
International Journal of Speleology
Stygobromus t. tenuis is one of only two species of troglobitic amphipods known to occur in the New England physiographic province. The rarity of subterranean organisms in New England is attributed to limited karst development and eradication of organisms from the region during glacial times. Traditionally it has been believed that those troglobitic species presently occurring north of the glacial terminus migrated there following glacial retreat from refugia south of the areas influenced by glacial conditions. However, a few recent studies favour the existence of subsurface refugia in glaciated regions during glacial times. Stygobromus t. tenuis is recorded from springs …
Polydesmide Et Craspedosomides Cavernicoles Nouveaux De France Et Du Maroc (Myriapoda - Diplopoda), Jean Paul Mauriès
Polydesmide Et Craspedosomides Cavernicoles Nouveaux De France Et Du Maroc (Myriapoda - Diplopoda), Jean Paul Mauriès
International Journal of Speleology
This is a description of the affinities and biogeographic significance of three new cavernicolous species of Diplopoda from France and Morocco. One species apparently belongs to the Polydesmida (family Paradoxosomidae) and the other two to Craspedosomida (families Caratosphydae and Chordeumidae).
1) Eviulisoma abadi n.sp. is distinguished from other species of this genus by total depigmentation, by the characters of the gonopodial orifice and the male gonopods, by the low number of segments (19) and by its geographic isolation (Morocco) and ecology (Kef Aziza cave). This justifies the establishment of a new sub-genus, Jeekelosoma. The other species of this genus …
The Anatomy And Histology Of The Alimentary Tract Of The Blind Catfish Horaglanis Krishnai Menon, T. V. Anna Mercy, N. Krishna Pillai
The Anatomy And Histology Of The Alimentary Tract Of The Blind Catfish Horaglanis Krishnai Menon, T. V. Anna Mercy, N. Krishna Pillai
International Journal of Speleology
H. krishnai is a blind catfish inhabiting the dug-out wells at Kottavam Kerala, South India. Studies on the alimentary tract of the fish show that, the alimentary tract, though typically teleostean, shows several adaptive modifications. The bulbous stomach helps in storing food which is helpful in an environment chronically deficient in food. The ileo-rectal sphincter helps in retaining the digested food in the intestine for a long duration to facilitate maximum absorption. This is very helpful as the intestine is short. The liver is well developed.
Two New Genera Of Cave-Dwelling Millipedes (Diplopoda), With Remarks On The Millipede Fauna Of West Caucasian Caves, Sergei I. Golovatch
Two New Genera Of Cave-Dwelling Millipedes (Diplopoda), With Remarks On The Millipede Fauna Of West Caucasian Caves, Sergei I. Golovatch
International Journal of Speleology
Two new genera and species of the Diplopoda from Caucasian caves are described: troglobitic Caucasodesmus inexpectatus n.g., n.sp. (family Macrosternodesmidae) from a cave in North Osetia, North Caucasus, and troglophilic Ratcheuma excorne n.g., n.sp. (family Antroleucosomatidae) from a cave in Racha, Georgia, Transcaucasia. Millipedes of the western Caucasian cavernicolous fauna are reviewed as regards their distribution, relationship with caves and zoogeographical connections.
The Invertebrate Faunas Of Tropical American Caves, Part 6: Jumandi Cave, Ecuador, Stewart B. Peck
The Invertebrate Faunas Of Tropical American Caves, Part 6: Jumandi Cave, Ecuador, Stewart B. Peck
International Journal of Speleology
Twenty-two species of invertebrates are reported from Jumandi Cave, Napo Province, Ecuador. Three are probably trogloxenes, and the other 19 are troglophiles. The only troglobite is the catfish Astroblepus pholeter.
Morphological Clines In Reduced Areas. The Case Of Henrotius Jordai (Reitter), Cave-Dwelling Beetle From Majorca Island, Xavier Bellés
Morphological Clines In Reduced Areas. The Case Of Henrotius Jordai (Reitter), Cave-Dwelling Beetle From Majorca Island, Xavier Bellés
International Journal of Speleology
The present paper shows a statistically significant correlation between the geographical latitude and the morphological variation of the pronotum of Henrotius jordai (Reitter) (Col. Caraboidea), cave-dwelling beetle from Majorca island, after studying the linear and curvilinear regression between these two variables. The existence of specimens situated at different heights of the regression lines leads to the conclusion that morphological variation is clinal. The phenomenon of “semi-isolation” to which the studied populations are subjected, because of their cavernicolous character, allows to explain the existence of a cline in such a restricted area as that occupied by this beetle (ca. 500 Km …
Nouvelles Données Morphologiques Et Caryologie Du Triclade Hypogé Pyrénéen Dendrocoelum Lescherae, Nicole Gourbault
Nouvelles Données Morphologiques Et Caryologie Du Triclade Hypogé Pyrénéen Dendrocoelum Lescherae, Nicole Gourbault
International Journal of Speleology
The study of a new strain of the hypogeous Tricladida Dendrocoelum lescherae has demonstrated the very low anatomical variability of this species. The chromosome complement was found to be 2n = 32; measurements of somatic mitoses have shown that these elements are metacentric; the gametocytes possess 16 bivalents. Number and morphology of the chromosomes are similar within the subgenus Dendrocoelides.
New Records For Salentinella Ruffo (Crustacea Amphipoda) From Phreatic Waters Of Italy And Greece, Giuseppe Lucio Pesce
New Records For Salentinella Ruffo (Crustacea Amphipoda) From Phreatic Waters Of Italy And Greece, Giuseppe Lucio Pesce
International Journal of Speleology
New localities for the subterranean amphipod Salentinella Ruffo from central-eastern Mediterranean are reported. New collecting localities are listed for Italy, continental Greece and islands of Cephalonie and Zante. Furthermore, some remarks are made about the systematics, the variability and the ecology of the genus. Moreover, the Author refers to the main characteristics of a Salentinella sp. from central Italy, showing intermediate features between S. angelieri and S. franciscoloi. A map of the distribution of the genus Salentinella in Italy and in the Balkan-Dalmatian Peninsula is enclosed.