Angelo B. M. Machado

A histochemical study of catecholamines and cholinesterases in the autonomic nerves of the human minor salivary glands

SynopsisThe cholinergic and adrenergic innervation of human minor sublingual buccal and labial salivary glands has been studied with histochemical techniques for localizing acetylcholinesterase and catecholamines. A rich cholinergic innervation was observed around the acini, blood vessels and some ducts of the three glands.The adrenrgic innervation, however, was virtually absent from the parenchyma although present around the blood vessels, in marked contrast to the dense parenchymal adrenergic innervation observed in the human parotid and submandibular glands. These results suggest that the autonomic nervous mechanism which regulates salivary secretion is more elaborate in the major than in the minor salivary glands.

Studies on neotropical Protoneuridae. 15. Amazoneura gen. nov. with description of A. juruaensis sp. nov. (Odonata, Zygoptera)

The genus Amazoneura is erected to contain A. ephippigera (Selys, 1886), A. westfalli (Machado, 2001) and A. juruaensis sp. nov. The new genus is close to Forcepsioneura Lencioni, 1999 but differs from it mainly by the poorly-developed postero-lateral tubercles of the medium prothoracic lobe, by the dark colour of the metepimerum and of the rear of the head. A. juruaensis sp. nov. (holotype male, Acre, Brazil) differs from the other two species of the genus mainly by the structure of the superior anal appendages.

Studies on neotropical Protoneuridae. 11. two new species of Forcepsioneura Lencioni (Odonata-Zygoptera) with a key to males of the genus

Forcepsioneura haerteli sp. n. and F. westfalli sp. n. are described and illustrated from material collected respectively in the Santa Catarina State (Blumenau), Brazil and in the Napo Province (Limoncocha), Ecuador. Some notes are made on Forcepsioneura soncta (Hagen,1860) and a male topotype is illustrated. A key to males of Forcepsioneura is provided.

List of Odonates from Mata do Baú, Barroso, Minas Gerais, Brazil

A survey of odonatofauna was carried out in Mata do Bau, a predominantly forested area in Barroso, Minas Gerais, regarded as a priority area for conservation and scientific investigation, as published by Biodiversitas, a Brazilian nongovernmental institution. Sample collection was conducted over twenty-six days from November 2009 to February 2011. Fifty-seven species of Odonata were collected and grouped into 30 genera and nine families. The dominant families were Libellulidae (46.5%), Coenagrionidae (20.6%), and Megapodagrionidae (10.3%). A specimen of Heteragrion obsoletum (Selys, 1886) was collected, which to-date is known by a single specimen collected in 1880 and red-listed as endangered. Special attention was given to the presence of five species of the genus Heteragrion , strictly limited to lotic forest streams, with two new species’. This genus is especially sensitive to environmental deterioration, indicating that the forest stream’s environmental conditions are beneficial to the area and create a baseline for future monitoring of similar environments.

Studies on neotropical Protoneuridae: 19. Two new species of Neoneura from Southern Brazil (Odonata, Protoneuridae)

Neoneura anaclara sp. nov. and Neoneura leonardoi sp. nov. are described and illustrated from specimens collected in Southern Brazil. These two species are unique in the genus Neoneura by the structure of their anal appendages.

Three new species of Heteragrion Selys, from Brazil with redescription of the holotype of H. Dorsale Selys (Odonata, Megapodagrionidae)

Heteragrion luizfelipei sp. nov. from Santa Catarina, Heteragrion gracile sp. nov. from Minas Gerais) and Heteragrion mantiqueirae sp. nov. from Sao Paulo are described and illustrated. The color and structural characters that distinguish these species from those of Selys group 2 are discussed. The holotype of Heteragrion dorsale Selys, 1862 is redescribed and illustrated.

Erythrodiplax leticia, sp.n. de libélula do nordeste brasileiro (Odonata, Libellulidae)

Erythrodiplax leticia sp.n. is described based on nine male specimens, most of which collected at Chapada Diamantina, State of Bahia. The new species is close to Erythrodiplax fervida (Erichson, 1848) but differs from it by the size. venation. extension of the basal wing spots. and structure of the superior anal appendages.

Autonomic innervation of the salivary glands in the marmoset (Callithrix penicillata jordani); with some gross anatomical and histological observations

Abstract The autonomic innervation was studied with histochemical techniques for the demonstration of cholinesterase activity and catecholamines. The study was preceded by a survey of the gross anatomy and histology of the glands. In all the salivary glands, cholinergic and adrenergic fibres supplied the secretory units and the vessels. The ducts, however, had no adrenergic innervation, a feature which distinguishes the marmoset from man. The density of the autonomic nerve supply was greater in the parotid and submandibular than in the secondary submandibular and sublingual glands. The findings are compared with those available for man and other mammals, and their possible functional meaning is discussed.

Two new genera and nine new species of damselflies from a localized area in Minas Gerais, Brazil (Odonata: Zygoptera)

Two new genera, Franciscobasis and Franciscagrion, and seven new species, i.e. Acanthagrion franciscoi, Franciscobasis franciscoi, Franciscobasis sonia, Franciscagrion franciscoi, Franciscagrion longispinum, Minagrion franciscoi and Oxyagrion franciscoi, are described and illustrated. In addition, two new species of Peristicta are reported and will be described elsewhere. All these species have been collected along a 600 m stretch of the headwaters of the São Francisco River, within the Serra da Canastra National Park, in the state of Minas Gerais, Brazil. The significance of this finding in such a small area is discussed. http://zoobank.org/urn:lsid:zoobank.org:act:B7390427-0D9D-4464-AA67-5664B0688DA5; http://zoobank.org/urn:lsid:zoobank.org:act:48F0C894-1847-4594-A5EF-B71A0F57583D; http://zoobank.org/urn:lsid:zoobank.org:act:E4D73BF2-2E2A-4D55-9252-931CABBC2A0B; http://zoobank.org/urn:lsid:zoobank.org:act:D844B3F6-0D38-4C3E-B842-FD1A83073F9F; http://zoobank.org/urn:lsid:zoobank.org:act:29D2C471-8882-4C36-9764-84C7EBA893C6; http://zoobank.org/urn:lsid:zoobank.org:act:DDAF4E8C-69DD-41C2-AEFA-EC42186F6E5E; http://zoobank.org/urn:lsid:zoobank.org:act:725CC35B-749F-498D-B3F0-1D29193E1538; http://zoobank.org/urn:lsid:zoobank.org:act:6BCC759F-83DA-43ED-A700-B28CE3CA24BB; http://zoobank.org/urn:lsid:zoobank.org:act:3CC24F54-773D-4B0B-9C70-DE32F351D4BD

A new species of Ischnura (Odonata: Coenagrionidae) from high altitude eastern Andes, of Colombia

Ischnura mahechai sp. nov. is described and illustrated based on specimens collected at the Eastern Andean mountain range of Colombia. The species is close to Ischnura cruzi De Marmels, 1987 but differs from it by the structure of male anal appendages and female hind prothoracic lobe. The specimens were collected on a small Andine lake at 3,600 m, the 4th altitudinal record for a resident odonate.