Neotropical arctiine moths (Erebidae) are generally brilliantly colored and therefore believed to be aposematic, in light of the of the frequent occurrence of glands that produce unpleasant chemicals as a defense mechanism ...

A new acidic amino acid, 2,4-methanoglutamic acid, containing a cyclobutane ring and a new imino acid, 2,4-methanoproline, containing the previously unknown 2-azabicyclo[2.1.I)hexane system have been isolated from seeds ...

The Critically Endangered largetooth sawfish Pristis pristis is one of the most threat- ened elasmobranch species and is currently thought to be locally extinct in at least 27 countries. Although largetooth sawfish information ...

Los primates constituyen el grupo de mamíferos arbóreos mas grande y numeroso del Nuevo Mundo. En algunos bosques tropicales ellos son los principales vertebrados frutiboros y foliboros que represen tan a una significativa ...

Ultra-intense femtosecond X-ray pulses from X-ray lasers permit structural studies on single particles and biomolecules without crystals. We present a large data set on inherently heterogeneous, polyhedral carboxysome ...

Costa Rica is within the Mesoamerican biodiversity hotspot and has about 53 native species of small mammals. This high diversity, along with recent records of new species and indications of cryptic genetic diversity, suggest ...

A new species, Heterospilus michaeli Kula, from the Neotropical Region is described and di"erentiated from all other New World species of Doryctinae with brachypterous or apterous individuals. It is the #rst ...

The genus Atrigalleria Becker, gen. n. with two new species: Atrigalleria chlorogramma Becker, sp. n., from Ecuador and A. chlorographa Becker, sp. n., from Ecuador and Costa Rica are described.