Julián Monge Nájera

A new giant species of placented worm and the mechanism by which onychophorans weave their nets (Onychophora: Peripatidae)

Onychophorans, or velvet worms, are poorly known and rare animals. Here we report the discovery of a new species that is also the largest onychophoran found so far, a 22cm long female from the Caribbean coastal forest of Costa Rica. Specimens were examined with Scanning Electron Microscopy; Peripatus solorzanoi sp. nov., is diagnosed as follows: primary papillae convex and conical with rounded bases, with more than 18 scale ranks. Apical section large, spherical, with a basal diameter of at least 20 ranks. Apical piece with 6-7 scale ranks. Outer blade 1 principal tooth, 1 accessory tooth, 1 vestigial accessory tooth (formula: 1/1/1); inner blade 1 principal tooth, 1 accessory tooth, 1 rudimentary accessory tooth, 9 to 10 denticles (formula: 1/1/1/9-10). Accessory tooth blunt in both blades. Four pads in the fourth and fifth oncopods; 4th. pad arched. The previously unknown mechanism by which onychophorans weave their adhesive is simple: muscular action produces a swinging movement of the adhesive-spelling organs; as a result, the streams cross in mid air, weaving the net. Like all onychophorans, P. solorzanoi is a rare species: active protection of the habitat of the largest onychophoran ever described, is considered urgent.

How to correct teaching methods that favour plagiarism: recommendations from teachers and students in a Spanish language distance education university

The presentation of the intellectual work of others as their own by students is believed to be common worldwide. Punishments and detection software have failed to solve the problem and have important limitations themselves. To go to the root of the problem, we applied an online questionnaire to 344 university students and their 13 teachers. Our objective was to compare their views on plagiarism and to test nine hypotheses about causation. We found that both students and teachers know what plagiarism is and that each group blames itself to some extent. Students blamed their own attitude but also mentioned their need to cope with an unnecessarily heavy workload imposed by teachers. Teachers blamed impunity and their own failure in providing meaningful and creative student work. Only 8% of the students admitted to plagiarising contents and admission was independent of need for higher scores, years in the university, sex, age, occupation, career or living in a small city where educational resources are more limited. We found that Spanish language literature has given more attention to the students’ point of view than much of its English counterparts, and conclude that plagiarism can be prevented by an approach based mainly on a workload defined by teacher teams instead of isolated teachers; reduction of rote learning (associated with texts that are easy to copy and paste); assignment of individualised work that cannot be plagiarised (workshops, exhibitions, forums, portfolios, solving real cases, applying concepts to the student’s personal experience); and accompanying students along the whole process of producing the written work.

Urban vegetation change after a hundred years in a tropical city (San José de Costa Rica)

Urban vegetation is of key importance because a large proportion of the human population lives in cities. Nevertheless, urban vegetation is understudied outside central Europe and particularly, little is known about the flora of tropical Asian, African and Latin American cities. We present an estimate of how the vegetation has changed in the city of San Jose, Costa Rica, after about one century, with the repeat photography technique (based on a collection of 19th and early 20th century photographs by Jose Fidel Tristan and others) and with data from the Costa Rican National Herbarium. We found little vegetation change in the landscape of San Jose during the 20th century, where a total of 95 families and 458 species were collected in the late 19th and early 20th century. The families with most species were Asteraceae, Fabaceae, Poaceae, Lamiaceae, Euphorbiaceae, Solanaceae, Cyperaceae, Acanthaceae, Malvaceae, Piperaceae and Verbenaceae. Similar results have been found in Europe, where the number of plant species often is stable for long periods even when the individual species vary.

An Open Letter to the owners of the Impact Factor

I am writing this open letter to you, the people who produce the Impact Factor reports, in good will and because I believe you can improve it.

Subject and authorship of records related to the Organization for Tropical Studies (OTS) in BINABITROP, a comprehensive database about Costa Rican biology

BINABITROP is a bibliographical database of more than 38 000 records about the ecosystems and organisms of Costa Rica. In contrast with commercial databases, such as Web of Knowledge and Scopus, which exclude most of the scientific journals published in tropical countries, BINABITROP is a comprehensive record of knowledge on the tropical ecosystems and organisms of Costa Rica. We analyzed its contents in three sites (La Selva, Palo Verde and Las Cruces) and recorded scientific field, taxonomic group and authorship. We found that most records dealt with ecology and systematics, and that most authors published only one article in the study period (1963-2011). Most research was published in four journals: Biotropica, Revista de Biologia Tropical/ International Journal of Tropical Biology and Conservation, Zootaxa and Brenesia. This may be the first study of a such a comprehensive database for any case of tropical biology literature.