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Gongylonema neoplasticum was identified in the oesophagus of 14 wild rabbits (Oryctolagus cuniculus) from Portugal. This is the first record of Gongylonema neoplasticum in a naturally infected lagomorph species in Europe. This paper presents the most relevant measurements of adult worms and some of their surface features seen by scanning electron microscopy. Epidemiological aspects of G. neoplasticum such as geographical distribution, host spectrum and biological features are discussed.
The extinct rabbits, Hypolagus beremendensis (Kormos, 1930) and Hypolagus brachygnathus (Petényi, 1864) were the most abundant European representatives of Hypolagus (Leporidae, Archeolaginae). In Poland their fossil remains are known from rich accumulations filling karst forms of the Kraków-Wieluń Upland and Świętokrzyskie Mountains. Review of the Polish Plio-Pleistocene (Ruscinian to Biharian) material from seven localities and the description of new specimens from six localities are given. The history of research on the Central European Hypolagus is summarised and the emended differential diagnoses with synonymy are provided for each species, accompanied by descriptions of the type material. On the basis of over 11,000 specimens, the quantitative analysis (descriptive statistics and ANOVA), as well as the detailed study of tooth enamel pattern (P2 and p3 morphotype analysis) and the bone morphology were conducted, which enabled to assess the intra- and interspecific variability. H. beremendensis, the smaller and gracile species persisted from the Late Pliocene (MN 15, Węże 1 locality) to the earliest Pleistocene (Kamyk locality). In Kamyk it co-occurred with the larger, robust, and predominant H. brachygnathus, which survived in Poland until the end of the Biharian (Zalesiaki 1A locality). Palaeoecology and adaptations of both species and the possible causes of their extinction are discussed.
Hypolagus beremendensis, a representative of the Archaeolaginae, was one of the most abundant and widespread leporids in the Plio−Pleistocene of Europe. The vast accumulations of skeletal remains from the Polish Pliocene sites (Węże 1, Rębielice Królewskie 1 and 2, and Kadzielnia 1) yielded thousands of bones representing almost all skeletal regions. The detailed hind limb morphology of Hypolagus beremendensisis presented in comparison with five extant leporids (Lepus europaeus, Oryctolagus cuniculus, Pentalagus furnessi, Sylvilagus floridanus, and S. brasiliensis), which represent a wide range of locomotor adaptations. The UPGMA analysis of 98 metric characters places Hypolagus beremendensis next to the leporine rabbits. Hypolagus beremendensis has the os coxae, femur, and talus most similar to P. furnessi, tibia and calcaneus to the leporine rabbits, and the structure of foot to Lepus. The elongation of the foot and tibiofibular segment in relation to the femur indicates an advanced cursorial adaptation and a relatively steep jump. The similarities in the proximal segments (os coxae and femur) between Hypolagus and Pentalagus highlight the conservative morphology of this region in the Leporidae.
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