Papers by Franz-Josef Schiel
Angewandte Carabidologie, 2022
Ground beetles were studied in 2018 and 2020 in a water buffalo pasture of just under 5 ha establ... more Ground beetles were studied in 2018 and 2020 in a water buffalo pasture of just under 5 ha established in 2018 in the nature reserve „Freiburger Rieselfeld”. In each of the two years there were four trap series and five trapping periods. A total of 75 species were detected, including six species that are endangered at federal and/or state level, three vulnerable species and eight near threatened species. Of particular note were the detections of Harpalus cupreus in both years and Syntomus obscuroguttatus in the second survey year, for which only very few records of occurrences exist. Between 2018 and 2020, specialized wetland species within the pasture declined as a result of the dry-hot years, while the populations of characteristic species of dry-warm open habitats increased. As a result of thinning of the woody stands within the pasture, typical forest species declined. The most significant declines, however, were in specialized seed predators, which no longer found grass seeds i...
Ecology of <i>Protallagma</i> (cf.) <i>titicacae</i> Garrison <i>et... more Ecology of <i>Protallagma</i> (cf.) <i>titicacae</i> Garrison <i>et al.</i> (2010) state: "Habitat: Lakes, ponds, pools, and seeps in high altitude Andean plateau, where they can be seen in swarms and constitute the only zygopteran present." Hoffmann (in: Corbet 1999) describes habitats at 4,730 m in the treeless Janca of the Peruvian Andes in which resident populations were found. The species seems to occur regularly in Puna type regions in protected landscapes in natural depressions characterized by small forests of <i>Polylepis</i> trees. Furthermore, water and soil were often warmed by thermal streams. Adults of <i>Protallagma titicacae</i> flew close to the ground, and when clouds obscured the sun the damselfly promptly took cover in tufts of grass where they were sheltered from wind and could absorb warmth from the heated ground. Further information on the ecology of <i>Protallagma titicacae</i> ...
Differentiation between <i>Protallagma</i> Kennedy, 1920 and <i>Oxyallagma</... more Differentiation between <i>Protallagma</i> Kennedy, 1920 and <i>Oxyallagma</i> Kennedy, 1920 The genus names <i>Protallagma</i> and <i>Oxyallagma</i> were both introduced by Kennedy (1920). <i>Protallagma</i> was applied to the type of <i>Amphiagrion titicacae</i> (Calvert 1909), a species also bearing the synonym <i>Protallagma andinum</i> (Förster, 1909). The genus <i>Oxyallagma</i> was applied to <i>Oxyagrion dissidens</i> (Selys, 1876). However, the differentiation between the genera <i>Protallagma</i> and <i>Oxyallagma</i> posed some difficulties in the past. In 1939, Kennedy received more than thousand specimens of a red and blue damselfly from Ecuador which he considered a new <i>Protallagma</i> species. He described it as <i>Protallagma runtuni</i> (Kennedy, 1939), but later (Kennedy, 1946) recognised it was identical wit...
Differentiation between <i>Protallagma titicacae</i> and <i>Protallagma hoffman... more Differentiation between <i>Protallagma titicacae</i> and <i>Protallagma hoffmanni</i> von Ellenrieder & Garrison (2008: 5) point out that the body of <i>P. titicacae</i> has long setae, as is the case "in numerous Coenagrionidae of colder areas." This is true for <i>P. hoffmanni</i> as well. Both species share many other common traits, as stated above. Tables 1 and 2 show characteristics that can be used to differentiate between the two <i>Protallagma</i> species. Males <i>Protallagma titicacae</i> (Calvert, 1909) <i>Protallagma hoffmanni</i> sp. nov.
This dataset contains the digitized treatments in Plazi based on the original journal article Hun... more This dataset contains the digitized treatments in Plazi based on the original journal article Hunger, Holger, Schiel, Franz-Josef (2012): Description of Protallagma hoffmanni sp. nov. from the Peruvian Andes (Odonata: Coenagrionidae), including description of its larva. Zootaxa 3202: 28-50, DOI: 10.5281/zenodo.215126
FIGURE 29. Runnel with shallow water and dark sediment, habitat of P. hoffmanni, Laguna Querococh... more FIGURE 29. Runnel with shallow water and dark sediment, habitat of P. hoffmanni, Laguna Querococha, Feb. 18, 2007.
FIGURE 28. Runnel, habitat of P. hoffmanni, Laguna Querococha, Feb. 18, 2007.
FIGURE 27. Laguna Querococha, Feb. 18, 2007.
FIGURE 21. P. hoffmanni, mandibles of larva, ventrointernal view.
FIGURE 17. P. hoffmanni, male FO-larva, lateral view.
FIGURE 16. P. hoffmanni, female, dorsal view. Laguna Querococha, Feb. 18, 2007.
FIGURE 15. P. hoffmanni, female with numerous red water mites, perched horizontally. Laguna Quero... more FIGURE 15. P. hoffmanni, female with numerous red water mites, perched horizontally. Laguna Querococha, Feb. 18, 2007.
FIGURE 13. P. hoffmanni, male with red water mite on ventral side of thorax, perched within Ichu ... more FIGURE 13. P. hoffmanni, male with red water mite on ventral side of thorax, perched within Ichu vegetation. Laguna Querococha, Feb. 18, 2007.
FIGURE 12. P. hoffmanni, right hindwing of female paratype.
FIGURE 11. P. hoffmanni, left forewing of female paratype.
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Papers by Franz-Josef Schiel