Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  external morphology
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The external morphology of rare soil inhabiting mites belonging to the monobasic family Stigmocheylidae (Acari: Prostigmata) is examined, based on the material from North America. Homologies of all studied morphological structures with those of other prostigmatic mites are established. An expanded taxonomic diagnosis of the family is provided for the first time. Two new species from North America are described, Stigmocheylus americanus sp. nov. and S. oberon sp. nov. These species differ from S. brevisetus Berlese, 1910, the type species of the genus, by the longer body 510 and 630 µm, respectively (vs. 380 in S. brevisetus) and by the absence of setae c3. Stigmocheylus oberon sp. nov. differs from S. americanus sp. nov. by the absence of g2 (vs. its presence in S. americanus), and by leg setation: setae ve'and ve” on tarsi II–III; v' on tibia IV, l1, l”1, v'1 on genu I, l” on telofemur III, l'on telofemur IV, l” on basifemur I, d on basifemur II, and 4c on coxa IV are present (vs. absence of these setae in S. americanus sp. nov.). All three species differ from S. pilosus (Soliman et Zaher, 1975), the second formerly known species of this family, by having the non segmented peritremes.
The pupa and imago of Chironomus acerbiphilus (a senior synonym of C. crassimanus) show wide variation of external morphology characters. This paper describes the external morphology of larva, pupa and adult of C. acerbiphilus from Poland. Variability of morphological characters is evaluated for the Polish population in comparison with other European, Asian and North American populations. Pupal suhgeneric characters are discussed.
The morphology of juvenile stages and ontogeny of Heterozetes palustris (Willmann, 1917) and Zetomimus furcatus (Pearce & Warburton, 1906) are redescribed and illustrated. The juveniles of the former species have most prodorsal and gastronotal setae long, and smooth integument with microtuberculate cerotegument, while those of the latter species have most prodorsal and gastronotal setae short, with three pairs of longer and thicker setae in the posterior part of gastronotum, tuberculate integument, and two darker stripes, transverse and longitudinal, in the shape of letter T, with microtuberculate cerotegument. Most of nymphs of Z. furcatus bear one scalp, and rarely 2-3 scalps of previous instars that adhere to the gastronotum, which is observed here for the first time. The adults of both species have several morphological characters of Ceratozetoidea, while their juveniles lack a humeral organ and distinct sclerites, which occur in most Ceratozetoidea.
This paper presents the karyotype and external morphology of larva, pupa and adult male of Stictochironomns sticticus (Fabricius, 1781) from Poland. The species of the genus Stictochironomus are generally identified on the basis of pupal and adult morphology. However, the species described in this paper has species-specific markers in the salivary gland chromosomes which allow identification at the larval stage. Karyological markers are evaluated for the Polish population in comparison with other European populations and Stictochironomus species.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 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.