Redescription of the larva of Amblyomma oblongoguttatum Koch, 1844 (Acari: Ixodidae) by light and scanning electron microscopy
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چکیده
The larval stage of Amblyomma oblongoguttatum Koch is redescribed using optical and scanning electron microscopy. Unfed larvae were obtained from a colony of A. oblongoguttatum originated from engorged females collected on domestic pigs from Monte Negro municipally (10°29’S, 63°32’W), State of Rondônia, Western Amazon, Brazil. Several characters are presented including the chaetotaxy of the idiosoma, palpi and Haller’s organ, as well as morphological features of the idiosoma, gnathosoma and legs. In addition, the porotaxy (topographical and numerical patterns of integumentary structures) were presented by using a new nomenclature recently proposed. The chaetotaxy of the larvae of A. oblongoguttatum, in general, is similar to other Neotropical Amblyomma species. Three types of integumentary structures were observed on the idiosoma: lyrifissures, small glands, and large wax glands. Topographic and numerical patterns of the integumentary structures consisted of 5 pairs of large wax glands (1 dorsal/ 4 ventral), 24 pairs of lyrifissures (11 dorsal/ 13 ventral), and 49 pairs of small glands (28 dorsal/ 21 ventral). These topographic and numerical patterns found for A. oblongoguttatum show only minor differences when compared with patterns of other Amblyomma larvae, however, a few key features can be used for identification of these species.
منابع مشابه
The genus Hyalomma Koch, 1844. III. Redescription of the adults and larva of H. (Euhyalomma) impressum Koch, 1844 (Acari: Ixodidae) with a first description of its nymph and notes on its biology.
In respect of its morphology, biology and epidemiology, Hyaloomma (Euhyalonuna) impressum Koch, 1844 is one of the more poorly studied ticks of the genus Hyalomma Koch, 1844. No comprehensive morphological study has been done to date, and the nymph has not been described. Here the adults and larva are redescribed, and the nymph is described for the first time. Data on hosts, geographical distri...
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