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1. Description of two new species of Enclisis (Hymenoptera: Ichneumonidae) and support for the secretory role of tyloids in ichneumonid males

Creator:
Bordera, Santiago and Hernández-Rodríguez, Estefanía
Type:
article, model:article, and TEXT
Subject:
Ichneumonidae, Cryptinae, Enclisis, new species, taxonomy, key, phenology, secretory glands, tyloids, and Spain
Language:
English
Description:
Two new species of Enclisis Townes, 1970 from Spain are described and illustrated: E. dichroma sp.n. and E. schwarzi sp.n. The new species are distinguished from the closest species E. infernator and E. ornaticeps by head and leg characters and body colour. Data on their phenology and a key to these four European species are presented. External and internal scanning electron microscopy of male tyloids revealed that these structures, in both new species, have a secretory role.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Ultrastructure of the surface structures and secretory glands of the rosette attachment organ of Gyrocotyle urna (Cestoda: Gyrocotylidea)

Creator:
Poddubnaya, Larisa G., Scholz, Tomáš, Kuchta, Roman, Levron, Céline, and Gibson, David I.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Cestoda, Gyrocotylidea, Gyrocotyle urna, rosette organ, adhesive secretion, secretory glands, and ultrastructure
Language:
English
Description:
The surface structures and gland cells of the posterior rosette organ of Gyrocotyle urna Grube et Wagener, 1852, a member of the group presumed to be the most basal of the tapeworms (Cestoda: Gyrocotylidea), was studied by scanning electron and transmission electron microscopy. Surface structures on the outer (oriented away from the intestinal wall) and inner (in contact with the intestinal wall) rosette surfaces differ from each other and represent a transitional form between microvilli and microtriches typical of tapeworms (Eucestoda). The inner surface of the rosette possesses numerous glands. On the basis of the size and electron-density of their secretory granules, three types of unicellular gland cells can be distinguished. The least common type (Type I) is characterized by the production of small, round, electron-dense granules of about 0.3 µm in diameter, whereas another type of secretion (Type II) is formed from homogenous, moderately electron-dense, spheroidal granules of about 0.7 µm in diameter. The most common type of glands (Type III) is recognized by a secretion comprising large, elongate, electron-dense granules of about 1 µm long and 0.5 µm broad. The secretory granules of the three types of the glands are liberated by an eccrine mechanism and the gland ducts open via small pores on the inner rosette surface. The complex of secretory glands of the posterior rosette of G. urna is similar to those in the anterior attachment glands of monogeneans (as opposed to the types of glands present in other helminth groups). However, the tegumental surface structures of Gyrocotyle are supporting evidence for the relationship between the Gyrocotylidea and Eucestoda.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public