Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 21

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  Talpidae
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The helminth fauna of the European mole (Talpa europaea L., 1758) was studied on the basis of 269 host individuals from 39 localities in France and Spain. Twelve helminth species were recorded: two digeneans - Ityogonimus lorum (Dujardin, 1845) (Brachylaimidae) and Nephrotrema truncation (Leuckart, 1842) (Troglotrematidae); one cestode – Multitesticulata filamentosa (Goeze, 1782) (Dilepididae); and 9 nematodes - Capillaria talpae (Siebold, 1850), Eucoleus oesophagicola Sołtys, 1952, Liniscus incrassatus (Diesing, 1851), Trichuris feliui Ribas et Casanova, 2004 (Trichuridae), Parastrongyloides winchesi Morgan, 1928 (Strongyloididae), Porrocaecum spp. larvae (Ascarididae), Spirura talpae (Gmelin, 1790) (Spiruridae), Tricholinstowia linstowi (Travassos, 1918) and T. mornanti Durette-Desset et Vaucher, 1974 (Heligmonellidae). In the general helminth fauna, S. talpae was found the most prevalent species (43.9%) and with the highest infection intensity. Prevalences of l. lorum, L. incrassatus, Porrocaecum spp. and T. mornanti ranged from 9.7 to 17.5% and mean intensities between 1.4 and 2.3. L. capillaris, Porrocaecum spp., S. talpae and T. mornanti are core species in the helminth community of T. europaea. The rest of species are considered satellite. All the species found in males are present in females except E. oesophagicola. No significant differences were found between males and femaks in quantitative parameters. Values of Lefkovitch's index indicate a negative binomial distribution for all species. Correlation between altitude of the biotopes and species richness was not significant. Qualitative and quantitative data were compared with other known helminthological studies of Talpa spp. in Europe.
Density was estimated for three populations of eastern moles Scalopus aquaticus Linnaeus, 1758, in South Carolina using a trapping grid and assessment lines. As­sessment line data were based upon the repair of holes punched into surface tunnels of the animals. Using a new method of analysis for assessment line data, a logistic curve was fitted to the data. Density estimates based upon these analyses were (95% confidence intervals in parentheses) 3.02 (1.90 - 4.98), 2.73 (1.48 - 12.52), and 1.71 (0.86 - 2.69) moles/ha. In previous studies using assessment line data to estimate density, obtaining confidence intervals for the density estimate presented theoretical problems. In this study, Monte Carlo procedures were used to obtain an estimate of the approximate 95% confidence intervals for density. The analytical methods used in the present study eliminate the concepts of boundary strip width (strict sense) and the occurrence of distinctive zones with constant capture probabilities, and as such, represent important conceptual improvements of the assessment line density estima­tion method.
The generic attribution of the Plio-Pleistocene Polish moles ?Neurotrichus polonicus and ?Neurotrichus skoczeni has been questioned several times in the past. The fossil material belonging to ?Neurotrichus polonicus and ?Neurotrichus skoczeni is re-evaluated here and a new diagnosis is provided on the basis of qualitative considerations. In addition, a Geometric Morphometric analysis of the humerus has been performed including both extant and extinct Neurotrichini and Urotrichini taxa for comparison. Our results proved the unique morphology of the Polish material suggesting a distinct taxonomic state. The morphological variations evidenced by the humeral shape analysis agree with the observed qualitative differences and support a new generic allocation. The new genus Rzebikia gen. nov. is proposed for all the material previoulsly ascribed to ?Neurotrichus polonicus and ?Neurotrichus skoczeni.
The moles from the South German fissure fillings Petersbuch 6, 10, 18, 31, 35, 48 include 14 species, four of which are new: Leptoscaptor bavaricum gen. et sp. nov., Leptoscaptor robustior gen. et sp. nov., Myxomygale gracilis sp. nov. and Tenuibrachiatum storchi gen. et sp. nov. Most samples are characterised by their high species diversity. Talpa minuta is the most common species in nearly all samples. Leptoscaptor is characterised by a slender humerus and by the loss of lower antemolars. It is interpreted as a Miocene offshoot of the Scalopini. Myxomygale gracilis represents the latest record of the genus. Tenuibrachiatum storchi has a slender humerus and one lower incisor is lost. The species is structurally ancestral to the extant Urotrichus. The genus Pseudoparatalpa Lopatin, 1999 is considered a synonym of Paratalpa. The talpids of the Petersbuch fissures are in line with a Middle Miocene correlation of MN 7+8 as already indicated by the cricetids. The remains of desmans in the Petersbuch 6 fissure filling indicate the proximity of water. The presence of Urotrichini in nearly all samples, albeit scanty, suggests a forestal environment within the range of the owls, which preyed on them.
Trichuris feliui sp. nov. from the common mole, Talpa europaea (L., 1758), in Spain is described. The new species differs from other Trichuris spp. cited in Soricomorpha. From T. busuluk Polozhentsev, 1935 and T. mettami (Baylis, 1935), T. feliui sp. nov. differs in the morphology of the vulvar region, the spicule tip, the terminal position of the anus in females of T. busuluk, and in metrical features (body length, maximal body width, oesophagus length, ratios of forebody to hindbody length, spicule length and width, width of spicule at the proximal end, length of spicular sheath, egg length and width). The species most similar to T. feliui is T. neomi. The presence of a vulvar appendage in females, two postcloacal papillae in males and the absence of a spicular tube in T. feliui, separate this species from T. neomi. Measurements of body length, maximal body width, oesophagus length, spicule length, spicule width, and spicule width at the proximal end are additional characters that distinguish the two species. From T. muris Schrank, 1788 and T. arvicolae Feliu et al., 2000 found in small mammals in the same site, T. feliui differs in metrical characters. Also, the vulvar appendage is absent in T. muris and T. arvicolae and the spicular tube is present in both species. The presence of T. feliui in T. europaea is discussed from the perspective of helminthological and biogeographical aspects of Talpa spp. and other Soricomorpha.
14 species of shrews and at least three of moles, five of water-moles, and one of hedgehogs are described from ten Pliocene and one Early Pleistocene localities of Romania. The systematic position of the above-mentioned taxa, their measurements, illustrations, and history of Lipotyphla in Romania are given.
One hedgehog (Erinaceus cf. lechei), two moles (Talpa cf. levantis and "Scalopoides" cf. copernici), one shrew-mole (Quyania aff. polonica), and one desman (Desmana cf. polonica) are described from a Late Pliocene (MN17) karst fissure filling near the city of Varshets. Although the material is relatively well preserved, the exact determination was not possible because of the small samples and the fact that the taxonomy of the fossil forms from these groups is in a state of confusion. Up to now Late Pliocene remains of "Scalopoides" copernici and Quyania polonica have been known from Poland only. The occurrence of similar forms in Bulgaria during the Villanyian is considered as a relic situation, due to locally favorable conditions. The described insectivore assemblage is indicative of a temperate and humid climate, similar to the present-day conditions in SE Bulgaria.
17
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

A new talpid from the late Eocene of North America

67%
The origin and early evolution of talpids (moles, shrew−moles, and desmans) is not well understood, in large part due to the poor fossil record of early talpids. Here we report the oldest known talpid from North America, Oreotalpa florissantensis gen. et sp. nov., based upon a tiny dentary with m1–m3 discovered in upper Eocene (Chadronian) strata of the Florissant Formation, Florissant Fossil Beds National Monument, Colorado. Oreotalpa extends the North American record of talpids back by some six Ma and appears temporally correlative with the oldest documented talpids from the late Eocene of Europe. While others have postulated a Eurasian origin for talpids, discovery of Oreotalpa suggests that the evolution of the group was underway in North America by late Eocene time and raises the possibility of a North American origin.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 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.