Title. The first page of the manuscript will include title, name of the authors and their complete postal address. It will be also indicated a short heading.
Abstract. The second page will include an Abstract in English of no more than 250 words, preceded by the translation of the title to English if the paper were written in Spanish. The Abstract must be concise but enough informative on the objectives of the study, methodology and significance of the results.
Key words. In other paragraph the key words in English will be indicated, no more than six, separated by commas.
Resumen: A Resumen written in Spanish follow next which needs to be an accurate translation of the Abstract, which will be preceded by a translation of the title in Spanish if the paper were written in English.
Palabras clave. They will be the same as the ones indicated in the Abstract, but in Spanish language.
Text. The text will follow a general order of headings: introduction, materials and methods, results, discussion, conclusions, acknowledgments, bibliography, which will be centered and in capital letters (eg. RESULTS). Secondary headings go on the left margin in bold with only the initial letter capitalized (eg. Aquatic environments). Titles may be used for third and fourth grades using bold and italics, respectively. These titles will be the beginning of the paragraph with only the initial letter capitalized, followed by a dot and the text started with a capital in the same line. Scientific names and terms in different language than the text should be in italics.
Figures. The figures will be numbered in Arabic numbers and all of them need to be cited in the text. The drawing must be of good quality. If necessary, it is recommended to use gray tones, obtained by picseling at different density. The photographs need to have a good contrast and are recommended to be presented in brilliant paper. It will not be published colored pictures or plates, unless they were in charge of the author. The figures can be prepared for one or two columns, being its maximum width 70 mm or 144 mm respectively. The maximum length is 210 mm, but it is necessary to leave enough space for the legend. It is suggested that the originals of the figures do not be 1.5 – 2 times above of the final size; letters and numbers of the figures need to be 1.5 mm height after the final reduction. The magnification of the illustrations will be indicated by bar scales. The legend of the figures will be presented in a separate leaf at the end of the text.
Tables. The tables will be presented in separate leaves at the end of the text, and numbered consecutively in Arabic numbers.
Bibliography. The bibliographic citations in the text will make only reference to the author and year (eg. Pérez & Smith, 1929), unless it will be necessary to mention pages or figures. In the case of two authors the abbreviation et al. will be used. It is necessary to notice that the conjunction “&” is used in all citations. The final bibliography must correspond exactly to that mentioned in the text. It is quite important to pay especial attention to the format, order and punctuation, according to the examples given below.
In the case of book titles, these will be in italics. Eg.:
Moure, J.S. & P.D. Hurd. 1987. An Annotated Catalog of the Halictid Bees of the Western Hemisphere (Hymenoptera: Halictidae). Smithsonian Institution Press, Washington, 405 pp.
In the case of works of periodical publications, the title must be written in normal letter and series or journals in italics. The latter are abbreviated according to international use, except those made of a single word. Eg.
Olson, S. 1992. Neogaeornis wetzeli Lambrecht, a Cretaceous loon from Chile (Aves: Gaviidae). J. Vert. Paleont. 12(1): 122-124.
Cuando se trate del capítulo de un libro deberá seguirse el siguiente formato:
Angelelli, V. & J.C. Fernández Lima. 1972. Ciclos metalogenéticos de la Argentina. En: A.F. Leanza (ed.), Geología Regional Argentina, pp. 797-813, Academia Nacional de Ciencias, Córdoba.
En caso de citar más de una vez el mismo autor/es, deberá seguirse el siguiente formato:
Compagno, L.J.V. 1977. Phyletic studies of living sharks and rays. Amer. Na., 17 (2): 302-322.
--- 1999a. Check list of living Elasmobranchs. Appendix. En: W.C. Hamlett (ed.), Sharks, skates and rays. The biology of elasmobranch fishes, pp. 471-498, The John Hopkins University Press.
--- 1999b. Systematics and body form. En: W.C. Hamlett (ed.), Sharks, skates and rays. The biology of elasmobranch fishes, pp. 1-42, The John Hopkins University Press.
Despite the given examples, it is highly recommended to the authors to check the citation style used in previous numbers of the magazine.
Proofs. The author will receive a proof of work (test galley) for correction. As a rule, it will not be accepted without charge other than corrections of typesetting errors or composition.