Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 10

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Queensland
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The paper reports on the occurrence of five Thermocyclops species in urban subterranean habitats in North Queensland, Australia: T. crucis sp. nov., T. pseudoperculifer sp. nov., T. rylovi (Smirnov), T. crassus (Fischer), and T. decipiens (Kiefer). Females and males of T. operculifer (Kiefer), a supposedly close relative of the Australian taxon T. pseudoperculifer, is redescribed based on the holotype (Lombok) and non-type material (Sulawesi) from Indonesia. Thermocyclops crucis sp. nov. and T. pseudoperculifer sp. nov. (tropical coast of Queensland) share the caudally spinulose ornamentation of P2-P4 couplers and bare PI coupler with T. operculifer (Indonesia: Lombok, Sulawesi) and T. uenoi (Japan: Kyushu, Tomogashima Island). Diagnostic values of the morphological characters used to define the 'schmeili-growp' sensu Mirabdullayev and Fiers, to which both new Australian taxa might be allocated, are discussed. Finding of T. rylovi known so far from East Africa, Central and South Asia, in a semiarid inland locality in Queensland, is the first record of the species in Australia. Descriptions and illustrations of the diagnostic characters of T. crassus and T. decipiens are provided, and the morphology of the Australian specimens is compared with that in the European and Southeast Asian representatives. An identification key to all Thermocyclops species occurring in Australia is added.
Instances of dwarfism in the fossil record are of interest to palaeontologists because they often provide insight into aspects of palaeoecology. Fossil species of Australian-Pacific mekosuchine genus Mekosuchus have been described as dwarf, primarily terrestrial crocodiles, in contrast with the nearly ubiquitous semi-aquatic habitus of extant crocodilians (Willis 1997). This hypothesis has been difficult to test because of limited knowledge of the cranial and postcranial skeleton of extinct taxa and the continuous nature of crocodilian growth. New crocodilian vertebral material from Riversleigh, northwestern Queensland, tentatively referred to Mekosuchus whitehunterensis, displays morphological maturity indicative of adult snout-vent length little over a half-meter, proportionally smaller than extant dwarf taxa. Further, this material displays morphology that indicates a relatively large epaxial neck musculature for its body-size. These attributes suggest this dwarf mekosuchine employed unusual feeding behaviours. The ability to perform normal death-roll, de-fleshing behaviours would be limited in a mekosuchine of such small size. Given the powerful neck muscles and other anatomical features, it is more likely that this mekosuchine killed and/or dismembered its prey using a relatively forceful lifting and shaking of the head.
Dendromonocotyle urogymni sp. nov. is described from the dorsal surface of the porcupine ray, Urogymnus asperrimus, kept at Cairns Marine Aquarium Fish in Cairns, Queensland, Australia. Dendromonocotyle urogymni can be distinguished most readily from the other 15 species in the genus by the male copulatory organ which has a distinct spherical inflation mid-way along its length. This is the first monocotylid to be described from U. asperrimus.
Gills of carangid fishes in Australian waters are dominated by a diversity of polyopisthocotylean monogeneans. This study updates current knowledge of polyopisthocotyleans from carangid hosts in waters along the Queensland coast of Australia and also off New Caledonia. The discovery of Protomicrocotyle celebesensis Yamaguti, 1953 is the first record for the genus in Australian waters and represents a new geographic location for the species, extending its distribution from Sulawesi, Indonesia and Hawaii to Australia. Furthermore, Caranx ignobilis and Carangoides fulvoguttatus are reported as new host records for P. celebesensis. Carangoides gymnostethus is recorded as a new host for Heteromicrocotyla australiensis Rohde, 1977 from a new geographic location, namely Lizard Island, Queensland. Heteromicrocotyloides mirabilis Rohde, 1977 is reported from the gills of C. fulvoguttatus off Lizard Island, Queensland representing a new geographic record. Heteromicrocotyloides megaspinosus sp. nov. is described from the gills of C. fulvoguttatus from Lizard Island, Queensland and New Caledonia. The new species is distinguished from H. mirabilis by the larger number and size of spines in the male genital corona. Gonoplasius carangis was collected from Pseudocaranx dentex at Heron Island, Queensland. Gonoplasius longirostri is synonymised with G. carangis due to overlap in measurements and similar morphology. The number of ‘dorsal pits’ in this taxon may not be a useful character because they can be cryptic and hard to see. Most hosts from which these two Gonoplasius species have been collected previously have been synonymised as Pseudocaranx dentex except Caranx ascensionis which is now considered to be C. lugubris. Our report of G. carangis from P. dentex at Heron Island, Queensland is a new geographic record.
Trimusculotrema heronensis sp. nov. is described from the skin of the pink whipray, Himantura fai, caught at Heron Island on the Great Barrier Reef, Queensland, Australia. The parasite differs from its closest relative, T. uarnaki, by its greater size and by features of the cirrus. There is evidence that the haptor of T. heronensis secretes cement. The living parasite is unable to swim. Whether Trimusculotrema spp. are benedeniines or entobdellines is discussed.
A new genus and species, Affecauda annulata, belonging to the Gyliauchenidae Goto et Matsudaira, 1918 was found in the intestine of Naso tuberosas from Heron and Lizard Islands on the Great Barrier Reef, Queensland, Australia. This is the first record of a gyliauchenid from a species of Naso. We have placed Affecauda annulata within the Gyliauchenidae based on the structure of its digestive tract and terminal genitalia, The unusual and distinctive shape of the hindbody, which is elongate and curled, and the location of the excretory vesicle and papilla, which is distinctly anterior to the ventral sucker, distinguish this genus from other genera within the Gyliauchenidae.
Two new species of Pseudocreadium are described from off northern Tasmania, P. maturini sp. nov. from Meuschenia freycineti and P. aubreyi sp. nov. from Acanthaluteres vittiger. They differ from the only other recognised species in the genus by the number of ovarian lobes and by size, and they differ from each other by size, shape, caecal length, forebody length, pre-oral lobe size, uterine position, excretory vesicle length and oral sucker shape. Lobatocreadium exiguum is redescribed from Sufflamen bursa, off Moorea, French Polynesia and Abalistes stellatus, Swain Reefs, Great Barrier Reef, Queensland. Records and measurements are given for Hypocreadium cavum from Sufflamen fraenatus and Lepotrema clavatum from Melichthys vidua, both off Heron Island, Great Barrier Reef, Queensland.
This paper presents the first records of the parasitic copepod Caligus furcisetifer Redkar, Rangnekar et Murti, 1949 beyond Indian waters, specifically, on the body surface and head of the critically endangered largetooth sawfish (commonly referred to as the freshwater sawfish in Australia), Pristis microdon Latham, 1794 (Elasmobranchii, Pristidae), in brackish tidal waters of the Fitzroy River in the Kimberley region of Western Australia and the Leichhardt River in the Gulf of Carpentaria in northern Queensland. This represents a geographic range extension of ∼8000 km for this parasite. Further, it is only the second member of the genus Caligus to be found on an elasmobranch host in Western Australia and it is the first time this species has been reported from the Southern Hemisphere. Male biased dispersal of P. microdon may be the vector in which the parasite has dispersed from India across to northern Australia, or vice versa. A decline in populations of the critically endangered P. microdon (and possibly other pristid species) in these regions may lead to a concomitant decline in their parasite fauna.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.