The genus Riccia L. in the monsoon tropics of Northern Territory north 18°S latitude is revised. Sixteen species are described detail, including four new (R. abdita Cargill, R. chrysocrinita obchantiana Cargill and verrucosa Cargill), with accompanying images line drawings. A key to distribution maps provided.

Based on newly collected materials here we report new faunistic data for this diverse island and describe five leptocerid species from the Batanta Island (Indonesia, West Papua, Raja Ampat Archipelago): Oecetis anyam Oláh, sp. nov., O. apam batanta Leptocerus nov. Setodes sarlos As well as to clear taxonomic status of it was necessary survey unsettled group hemerobioides with description Indone...

A taxonomic class is a family of nonempty sets such that either every two of its sets are disjoint or one is contained in the other. A complete taxonomic class is one in which every set is the union of the minimal sets contained in it. A connected taxonomic class has exactly one maximal set. The main results are exact and asymptotic formulas for the number of these classes and maximal taxonomic...

Ontology construction is a complex process composed by extraction tasks for domain concepts, as well as taxonomic and non-taxonomic relations among concepts. The extraction of non-taxonomic relations is the most neglected task, specially for Portuguese texts. Therefore, this paper presents a proposal for extracting non-taxonomic relations from Portuguese texts represented by a list of concepts ...

In this paper, we describe how to exploit a machine-readable dictionary (MRD) and domain-specific text corpus in supporting the construction of domain on-tologies that specify taxonomic and non-taxonomic relationships among given domain concepts. A) In building taxonomic relationships (hierarchically structure) of domain concepts, some hierarchically structure can be extracted from a MRD with m...

Developing IS theories has been an important goal for many IS researchers. Towards that end, we discuss how taxonomic theory can be developed. According to Gregor, taxonomic theories are theories for analyzing, which she classifies as Type I Theory. More specifically, we show that some taxonomies, after meeting some conditions, can lead to taxonomic theory. Building upon a method for taxonomy d...

The Witheringia solanacea complex consists of three species, W. asterotricha, W. meiantha, and W. solanacea, native to Central and South America. The three taxa are morphologically similar, and their distinctions and relationships have been the subject of taxonomic controversy. To investigate breeding systems and potential for hybridization among the taxa of the complex, two Costa Rican accessi...

This paper discusses the following key messages. Taxonomy is (and taxonomists are) more important than ever in times of global change. Taxonomic endeavour is not occurring fast enough: in 250 years since the creation of the Linnean Systema Naturae, only about 20% of Earth’s species have been named. We need fundamental changes to the taxonomic process and paradigm to increase taxonomic productiv...

In this paper, we describe how to exploit a machine-readable dictionary (MRD) and domain-specific text corpus in supporting the construction of domain ontologies that specify taxonomic and non-taxonomic relationships among given domain concepts. A) In building taxonomic relationships (hierarchically structure) of domain concepts, some hierarchically structure can be extracted from a MRD with ma...

Lepidopterists have long acknowledged that many uncommon butterfly species can be extremely abundant in suitable locations. If this is generally true, it contradicts the general macroecological pattern of the positive interspecific relationship between abundance and distribution, i.e. locally abundant species are often geographically more widespread than locally rare species. Indeed, a negative...