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§ The nomenclature of animal associations | 97 role in the subsequent years? Following this path would distort the reality of the zoocoenosis, creating an impression of stability where none exists. The advantage of the changeable terminology is that it also mirrors the dynamism in zoocoenoses, that is reflected in the names. The zoocoenosis named following the above scheme is an existing reality, both in space and time. The term Hyphantriaetena cuneae (Mezőtúr 1954) means that, in the given location and year, the gypsy moth population formed a catena, ie. colonised only a single host plant. The use of the term is only justified if we have qualitative and quantitative data about the populations in question, meaning that we can ascertain the existence of the zoocoenosis. The term Hyphantriaecium cuneae (Dolinapuszta 1954) means that the same corrumpent is associated with other corrumpents in at least one sub-biotope, meaning that it colonised several host plant species, which it had to share with other corrumpents. Zoocoenoses exist independent of us, but anamed zoocoenosis assumes that we carried out a census of its populations. This census is location- and time-specific, and maybe never encountered in the same way again. We illustrate the coenologically correct analysis, and the practical application of the above associational categories, through the following example. We complete a census in a wheat field of an arvideserta, using a sweep net. We catch many individuals of Oscinella frit and a few Meromyza saltatrix. These are corrumpents, and represent populations of catenaria of the studied oecus. We also catch several Coelinus niger, and we know these are parasitoids of the barley gout fly, an obstant of the catena Chloropiditena pumilionis. A few Alticoptera aenea indicates the formation of the catena Oscinellaetena frit and we also find a few Cantharis fusca, too. This predator can live on several species, and we classify it as an obstant element of the arvideserta’s presocium. A captured Pyrrhidium sanguineum does obviously not belong to the oecus, and is a peregrinant. A few Halictus spp. and the honey bee, Apis mellifera, are sustinents, belonging to the presocium. The presence of several Collyria calcitrator (calcitratrix) and a few Norbanus (Picroscytus) scabriculus signals - even though no stem sawfly were captured - the formation, in the wheat stems, of the catena Cephitena pygmaei. The adults of ladybirds (Coccinella) and hover flies (Syrphus) are obviously attracted by the population of the aphid Schizaphis (Toxoptera) graminum, that is a corrumpent of the catenarium. The two predators, on the other hand, can range over the whole arvideserta; therefore, they are obstant, or sustinent elements of the presocium, while the few Coccinella septempunctata larvae are clearly obstant on the catena Toxopteraetena graminum, as well as the lone Pachyneuron aphidis. The adults of Trissolcus (Microphanurus) semistriatus are obstant in the presocium, while their larvae, living in the eggs of Eurygaster maura are obstants in the Eurygastritena maurae catena. The Athalia roase must have ventured here from another oecus far away, and would be
