SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

In the course of the last years, I have been investigating the morphology of various groups of mites. During this comparative study, special attention has been paid to the gnathosoma, which organ represents the specialized structure of the mouthparts in this subclass. Recently, while summarizing my results on the phylogeny of the gnathosoma (Van der Hammen, 1969), it appeared necessary to start from a more primitive Arachnid condition in which the chelicerae are still in front of the palps; at the same time, just as in the mites, the coxisternal region of the palp should be present, and the mouth should be in front of the chelicerae. This condition is indeed still found in one primitive order of Arachnidea, viz., the Palpigradida. Representatives of this...

The gnathosoma of Hermannia convexa (C.L. Koch) (Acarida: Oribatina) and comparative remarks on its morphology in other mites

Palavras-chave: 42.74.

Ano: 1969

URL: http://www.repository.naturalis.nl/record/318742

In most groups of mites the gnathosoma is rather easy to study as a whole because it can be completely separated from the idiosoma without much difficulty. In Oribatid mites, however, the membrane attaching the chelicerae to infracapitulum and rostrophragma is very thin; separation of the gnathosoma consequently results in tearing the membrane, either between chelicerae and infracapitulum, or between chelicerae and rostrophragma. In both cases the original position of the chelicerae and their exact relation to camerostome and remaining part of gnathosoma, is difficult to reconstruct. As a result of this, only parts of the Oribatid gnathosoma have been described in literature. An extensive study of the infracapitulum (especially of its ventral surface) was...

Traces of ancient Dichotomies in angiosperms. (A contribution to our Knowledge of Phyllospory and Stachyospory)

Palavras-chave: 42.74.

Ano: 1968

URL: http://www.repository.naturalis.nl/record/317700

It is a generally accepted concept nowadays that dichotomy is the most primitive type of ramification in land plants. Recently Lam (1948) briefly reviewed the literature of this subject in the light of the telome theory. He recalled that the dichotomies of fern leaves are to be regarded as homologous to the dichotomies of stems in more primitive plants and enumerated a number of more or less haphazardly collected cases in higher plants, of which the most probable interpretation is that they are traces of such ancient dichotomies, betraying their original relation to a branch system. In his paper, Lam discriminated between such traces in vegetative and in reproductive parts and he arrived at the provisional conclusion that traces of ancient dichotomies in...

Further notes on the Holothyrina (Acarida) : I. Supplementary description of Holothyrus coccinella Gervais

Ano: 1947

URL: http://www.repository.naturalis.nl/record/524431

The present paper is the first part of a series of two studies dealing with the morphology of the suborder Holothyrina. Some years ago (Van der Hammen, 1961), I published already an extensive description of a species from New Guinea (Holothyrus grandjeani Van der Hammen), in which paper I pointed to a number of important characters generally neglected in the study of Anactinotrichida. Because my material of H. grandjeani contained only one adult specimen, a number of characters (e.g. details to be studied in transverse as well as in longitudinal sections) could, however, not be taken into consideration. As a result of my 1961 study, a reinvestigation of nearly all species of Holothyrus, and especially of the type-species (H. coccinella), became highly...

The morphology of Epilohmannia zwarti spec. nov., an Oribatid mite from New Guinea

Palavras-chave: 42.74.

Ano: 1965

URL: http://www.repository.naturalis.nl/record/318632

A detailed description is given of a new species of the genus Epilohmannia Berlese (Oribatida) from New Guinea. The relationships of the species are discussed. The mouthparts, characterized by the fusion of the epimera of the segments of palp and leg I, are compared with those of the Palpigradi (in which group these epimera have also fused).

Comparative studies in Chelicerata III. Opilionida

Palavras-chave: Epilohmanniidae; Morphology; Mouthparts; New Guinea; Oribatida; Palpigradi; 42.74.

Ano: 1986

URL: http://www.repository.naturalis.nl/record/318790

A comparative study is made of the three groups (Cyphophthalmi, Laniatores and Palpatores) into which Opilionida are currently subdivided. Methods, principles and terminology, adopted in this paper, correspond with those of parts I and II of the present series of studies in Chelicerata. Special attention is paid to mouthparts and appendages, to opilionid relationships, and to the evolution of chelicerate characters. It is demonstrated that Cyphophthalmi present all the essential opilionid characters, and evidently do not constitute a separate group. It is also demonstrated that Opilionida are not closely related to Actinotrichid or Anactinotrichid mites, but to other groups with a so-called myliosoma (mouthparts associated with coxisternal feeding); these...

Palavras-chave: Opilionida; Chelicerata; Comparative morphology; Classification; Evolution; Phy- logeny.; 42.74.

Ano: 1985

URL: http://www.repository.naturalis.nl/record/317785

John Ruskin as Zoologist

A study is made of John Ruskin's work in the field of zoology. It is demonstrated that Ruskin's early interest in zoology was connected with his study of ornament, whilst his later studies are connected with his Oxford teaching and his social work. Ruskin's interest in zoology concerned groups frequently represented in art (particularly birds and snakes). Of these groups he studied, in a fragmentary way, the artistic morphology, the life-habits, the particular position to art and literature, and the mythological signification. Besides that, his natural history teaching was focussed on the protection of animals and respect for nature.

New notes on Holothyrida (Anactinotrichid Mites)

Palavras-chave: 42.01.

Ano: 1983

URL: http://www.repository.naturalis.nl/record/318416

In the present study of the Anactinotrichid order Holothyrida, five species are dealt with: Australothyrus ocellatus nov. gen., nov. spec. (family Allothyridae) from Queensland, Australia; Hammenius (Leiothyrus) holthuisi nov. subgen., nov. spec. and Hammenius (Thonius) montanus nov. spec. (family Holothyridae), both from New Guinea; and Holothyrus coccinella Gervais and Holothyrus legendrei nov. spec. (family Holothyridae), both from Mauritius. The paper includes detailed studies of the morphology, a study of the postembryonic development, a reclassification of the species of the family Holothyridae, and notes on the relationships of the order Holothyrida.

Some notes on taxonomic methodology

Palavras-chave: 42.74.

Ano: 1983

URL: http://www.repository.naturalis.nl/record/317620

The present paper constitutes an introduction to taxonomic methodology. After an analysis of taxonomic practice, and a brief survey of kinds of attributes, the paper deals with observation, description, comparison, arrangement and classification, hypothesis construction, deduction, model, experiment, abstraction, and synthesis. The methodological aspects of the species-concept and of biological classification are dealt with in two final sections.

Tarsonemoides limbatus nov. spec., and the systematic position of the Tarsonemida (Acarida)

Palavras-chave: Abstraction; Classification; Comparison; Deduction; Description; Experiment; Hypothesis; Methodology; Model; Observation; Species-concept; Synthesis; Systematics; Taxonomy; 42.03; 42.70.

Ano: 1986

URL: http://www.repository.naturalis.nl/record/318283

In the course of my investigations in the field of comparative acarid morphology (Van der Hammen, 1961, 1963, 1964, 1964a, 1965, 1966, 1968, 1968a, 1968b, 1968c, 1969, 1969a, 1970, 1970a, 1970b), I have paid attention to various groups of mites, viz., all orders of Anactinotrichida, except Ixodida (apart from a small paper on the palp) ; and all orders of Actinotrichida, except Tarsonemida and Acaridida. One of the most important gaps is now constituted by the Tarsonemida, of which the systematic position has been controversial, although recent authors generally classified the group with the Trombidiformes or Prostigmata. Published data on the morphology, notwithstanding the fact that very important studies have recently appeared (e.g. Beer, 1954; Cross,...

Numerical changes and evolution in Actinotrichid Mites (Chelicerata)

Palavras-chave: 42.74.

Ano: 1970

URL: http://www.repository.naturalis.nl/record/317759

A survey is given of the evolutionary aspects of numerical changes in Actinotrichid mites. Numerical variations are studied in clones, in populations and in supraspecific taxa. Two particular aspects of the evolutionary changes (ontophylogeny and priority) are also dealt with. The changes are associated here, for the first time, with the regulatory system of the genome and its evolution. A general survey is, moreover, given of the main numerical changes in the Oribatid superfamily Nothroidea. Results are summarized in a general theory, and suggestions are given for continued research.

Recovery of some of the missing wrappers of Berlese's Acari, Myriopoda et Scorpiones

Palavras-chave: 42.74.

Ano: 1981

URL: http://www.repository.naturalis.nl/record/317623

Reproductions are given of the original wrappers of A. Berlese's Acari, Myriopoda et Scorpiones, fasc. II, IV, VI, VII and XIV. These wrappers (on some of which the first descriptions of new species are published) could not be included in the 1979 reprint edition of the work, as no extant copies of them were known at that time.

Contribution to the Knowledge of the Soil-Fauna of new Guinea

Palavras-chave: Acarida; ?. Berlese; Bibliography; Myriapoda; Pseudoscorpionida; 42.74.

Ano: 1986

URL: http://www.repository.naturalis.nl/record/319306

A broad survey is given of the occurrence and distribution of microarthropods (and some other animals) in the soil of the following vegetation types in New Guinea: algal communities in the intertidal zone, beach forest, mangrove swamp forest, sago palm swamp, lowland swamp forest, forests on limestone and other sedimentary rocks, pioneer vegetation on barren coral limestone, forests on serpentine and cristalline schists, and montane vegetations.

Schietmotten (Trichoptera) uit de ondergrondse kalksteengroeven in Zuid-Limburg

Palavras-chave: 42.65.

Ano: 1983

URL: http://www.repository.naturalis.nl/record/317748

A survey is given of the occurrence of Stenophylax permistus MacLachlan in thirty subterranean limestone quarries in Southern Limburg, The Netherlands.

A partial revision of the genus Metabelba grandjean (Oribatei, Acari)

Palavras-chave: 42.75.

Ano: 1983

URL: http://www.repository.naturalis.nl/record/317217

INTRODUCTION The genus Metabelba was created by Grandjean in 1936 for Belbidae of which the solenidions of tibiae II and III are coupled with protective hairs, but of which the solenidion of tibia IV is free, long, and tactile. The genus belongs to the group of rather small species that are never covered with foreign material, but of which the cerotegument is very thick, especially on the moniliform legs, whilst the adults often bear the larval and nymphal skins. The species have three or four lateral apophyses : one (which is not always present) between leg I and leg II, two between II and III, and one between III and IV. We have been in doubt as to the nomenclature of these apophyses, for although they have generally been regarded as tectopedia, they do...

Berlese's Primitive Oribatid Mites

Palavras-chave: 42.74.

Ano: 1953

URL: http://www.repository.naturalis.nl/record/318814

CONTENTS I. Introduction.................. 1 II. Bibliography.................. 4 III. Systematic review................ 8 IV. References..................84 V. Index...................90 I. INTRODUCTION Among the works of acarologists of the past, Berlese's numerous writings take a particular place. Although they contain descriptions of an enormous number of new species, and notwithstanding the fact that they must be regarded as an important contribution to progress of systematics, the way of publishing is superficial to such a degree that Berlese appears to be the author that created the largest number of problems. As a rule his Latin descriptions are extremely short and consist of a few lines only. When exceptionally a figure is given, it represents at...

The Morphology of Glyptholaspis Confusa (FOÀ, 1900) (Acarida, Gamasina)

Palavras-chave: 42.74.

Ano: 1959

URL: http://www.repository.naturalis.nl/record/317580

Morphology has developed rather differently in each of the large groups of mites. Our knowledge on the subject is nowadays at unequal levels, so that terminology, method, and way of interpretation are difficult to compare. This has resulted at present in a more or less unsurveyable condition of acarology as a whole. It is evident that a comparative acarid morphology is only possible when representatives of each group are studied, described, and figured according to the same method. In order to build up a survey of the mites based on these principles, I recently started a study of the Anactinotrichida according to methods used in oribatology. In 1961 I published an extensive description of a species of Holothyrus, with notes on characters generally...

The Oribatei (Acari) of the Netherlands

Palavras-chave: 42.74.

Ano: 1964

URL: http://www.repository.naturalis.nl/record/317689

INTRODUCTION The study of the Oribatei (moss mites or beetle mites) of the Netherlands was started by Oudemans, who in 1896 published his "List of Dutch Acari, First Part, Oribatei", that was followed in 1900 and 1902 by a first and by a second part of a "New List". After that time Oudemans repeatedly published papers in which Oribatei of the Netherlands were dealt with, although in his later years he paid less attention to this group of Acari. Only a part of the moss mites that Oudemans collected were mentioned by him; a preliminary catalogue of his collection, containing some hitherto unpublished faunistical data on Oribatei, appeared after his death (Buitendijk, 1945). Willmann (1930) published a note on interesting Oribatei in the Oudemans Collection,...

The distribution of spiders and Harvestmen (Chelicerata) in the Dutch National Park "De Hoge Veluwe"

Palavras-chave: 42.74.

Ano: 1952

URL: http://www.repository.naturalis.nl/record/317841

A preliminary study is made of the distribution of Araneida and Opilionida (Chelicerata) in a National Park in The Netherlands. Special attention is paid to the influence of vegetation structure on the distribution of the spiders.

Fortuynia marina nov. gen., nov. spec., an Oribatid mite from the intertidal zone in Netherlands New Guinea

Palavras-chave: 42.74.

Ano: 1983

URL: http://www.repository.naturalis.nl/record/318511

On December 7, 1953, while collecting animals along the south coast of Biak Island (Netherlands New Guinea), in the neighbourhood of the Base of the Royal Netherlands Navy 1), I was surprised in seeing red Trombidiid mites creeping on stones in the intertidal zone. These stones, which fall dry at low tide, were overgrown with green Cladophora socialis and several species of red algae 2). I became interested in the fauna of the littoral, especially in the possible presence of other Acari, and I spent several mornings in observing the animal life on the stones. The Trombidiid mites later appeared to belong to a Platytrombidium species, closely related to the species described by Michener (1946) as Microtrombidium littorale from mangrove forests along the...