Holotypus m [von *holo-, griech. typos = Prägung, Typ], das von einem Autor bei der Beschreibung einer neuen Art festgelegte (designierte) „typische“ Individuum (Typus-Verfahren der taxonomischen Nomenklatur). Nach den erst im 20. Jahrhundert strenger festgelegten internationalen Nomenklaturregeln muß es ein einzelnes, entsprechend gekennzeichnetes Exemplar sein. Bei Sexualdimorphismus kann entweder nur das Männchen oder nur das … Read more HOLOTYPE
Representing two planets, iron, copper and a couple of Olympian gods, the classical symbols for male and female pack a lot of meaning into a few squiggly lines. The symbols themselves are ancient, and the associations they make date back to the dawn of civilization. The ancients, after observing how the movements of heavenly bodies … Read more Where the male and female symbols came from…
Preserving beetles for DNA studies is easy, but a few rules need to be followed. You will first need to decide which specimens to preserve. It is ideal to have two or more specimens of a species preserved, so that the extra specimens can serve as backups in case the first specimen fails to yield … Read more How to collect beetles for DNA studies?
One of the most important features of Coleoptera is their ‘elytra’, the hard exoskeletal which covers their wings. The ‘elytra’ helps to protect the beetle but also has many other functions, too. Some beetles trap moisture in their wings and the elytra protects it from drying in heat and wind, this means the beetles can … Read more Why beetles have “hard” elytra?
A non-taxonomist’s perspective… Admittedly, this isn’t really a direct user submission per se, but it’s a question which comes up in the entomological world enough to warrant a discussion. Collecting of insects is not controversial amongst entomologists, but seems to strike a chord with many people who are interested in entomology. There’s the perception that … Read more Why do entomologists kill insects?
Recently in TREE, Mallet [1,2], argued for an operational, concept-free definition of species as ‘genotypic clusters’, asserting ‘that species are man-made groupings’ . However, Mallet resorts to the traditional notion of ‘good’ species for final arbitration regarding what degree of variation is appropriate for the species-level taxon. This is a poor species definition for two reasons. … Read more What are ‘good species’?
Why humans think like insects… Similarities between human and insect brains could be the reason why humans are attracted to plant-derived chemicals, such as tea, coffee, tobacco and drugs, according to a new book. Professor David Kennedy, of Northumbria University, Newcastle, believes his new book, Plants and the Human Brain, answers the question as to … Read more Plants And The Human Brain
International “BLACK LIST” Information about untrustworthy persons for buying, selling and trading insects
Not everyone has what it takes to be a successful invader. Most species that find their way to foreign lands starve, get eaten or otherwise fail to establish themselves in significant numbers. But every so often an organism thrives so well in its new terrain, that it ends up trampling much of the native flora … Read more Invasive Ladybugs – Secrets Of Their Success
An interesting research note just came out in the American Naturalist by Hamilton and colleagues entitled quantifying uncertainty in estimation of tropical arthropod species richness. I retweeted a Science Daily twitter feed on this that had a terribly misleading opening line: “New calculations reveal that the number of species on Earth is likely to be … Read more How many species are there?
Der Hirschkäfer – “Insekt des Jahres” 2012 (Lucanus cervus LINNAEUS, 1758) Bernhard Klausnitzer Zusammenfassung: Der Hirschkäfer (Lucanus cervus LINNAEUS, 1758) wird als “Insekt des Jahres” 2012 vorgestellt. Eine kurze Übersicht zur Biologie wird vorgelegt, und auf die kulturgeschichtliche Bedeutung der Art wird hingewiesen. Seit 1999 wird von einem Kuratorium das “Insekt des Jahres” erwählt. … Read more Insect of the year 2012
How do you mount insects and keep them from decaying? Some days ago, I was asked about mounting and preserving a Lucanus male from India. The collector was looking for a instruction manual or a tutorial. Well, it’s rather simple: First, you need to catch the insects. Therefore you need a basic equipment…beating bushes, nets, … Read more How to mount insects?