Two new species of Neocarus, N. entrerios n.sp. and N. misiones n.sp., are described for both adult instars, with locality data for a few additional records of unidentified specimens. Most Argentinean records are from the Northern and Eastern border regions. Even so, current results suggest that opilioacarid diversity in Argentina, while modest, is likely to include several more species.
A new species of opilioacarid mite, Neocarus belizensis sp. nov., is described from mid-level elevations in Belize's Maya Mountains. Laboratory observations confirmed that females nearly always deposit only one egg at a time, and that eggs are coated before deposition. Females guard both eggs and larvae. The larvae are nonfeeding and molt quickly to protonymphs. Adults appear to facilitate feeding by protonymphs. Actual mating could not be observed, but pre-mating behavior is documented.
A new species of opilioacarid mite, Opilioacarus thaleri n. sp., is described from mid-level elevation close to the seashore in Crete (Greece). It was found on moister sites, under stones or inside stone accumulations in phrygana vegetation. The peak of activity was found to be in early May. The diagnostic morphological characters include 7–8 eugenital setae (female), 5/7 setae on each sclerite at pregenital and genital areas, 11 setae on genital area (male), anterior dorsal shield with two pairs of eyes and 60–70 stout, ribbed setae, 5 (female) or 6 (male) leaf setae plus one pectinate seta on the palp tarsus, and the "simple" type of ovipositor with two pairs of glands, a pair of ducts plus a basal structure. The female karyotype comprises 16 monocentric chromosomes, predominantly with acrocentric morphology. Comparison with data of the ixodids and mesostigmatids indicates that a low number of chromosomes and predomination of acrocentric chromosomes could be plesiomorphies of the parasitiform mites.
Presentamos los primeros resultados de investigaciones orientadas a caracterizar los modos de vida en el valle de Las Juntas (Guachipas, Salta) y sus cambios durante la era prehispánica. Esta información es fundamental para comprender los contextos sociales del arte rupestre que se encuentra en distintos lugares del valle, pero con singular densidad en el Cerro Cuevas Pintadas (CCP). Desde el periodo Temprano (primer milenio DC) la población habitó en pequeños caseríos cercanos a cursos de agua, a los que se agregaron reductos defensivos durante el tardío (1000-1500 DC). Por esta época, las pinturas rupestres y las actividades asociadas a ellas alcanzaron su mayor profusión, fenómeno que se relacionaría con los cambios sociales ocurridos en aquella era de conflictos. La conquista Inca no parece haber transformado significativamente los modos de vida en la zona.
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