All posts tagged with entomology

By the time this post publishes, the vast majority of Brood X (2021) will have completed their above ground lifecycle. The vast numbers of adult Magicicada who first emerged in late April and early May will have disappeared, leaving behind their adult bodies as well as still massive numbers of exuviae (cast-off outer skins) from when they emerged as nymphs.

Aedes aegypti, dubbed the yellow fever mosquito, is a globally invasive, pervasive threat to human health. As the common name suggests, the species can carry a range of diseases, including not only yellow fever but also dengue, the Zika virus, and the chikungunya virus. It is responsible for an estimated 400 million infections each year.

Three hundred and seventy-four years ago on 2 April 1647, a remarkable woman was born: the artist and naturalist Maria Sibylla Merian. In the 17^th and 18^th century world of male-dominated science, Merian had to fight for her place in the natural sciences. Against all odds, she became a trailblazer, especially in developmental biology.

Merian’s legacy was recently explored during a 4-week student-project at the library of the Museum für Naturkunde in Berlin. The project was part of a master’s program for the University of Applied Science in Leipzig to enlarge the student’s experience in the historical holding field and give a glimpse into the planning and conducting of a project. The aim of the project itself was and is the digitization of two different editions of Merian’s work Metamorphosis insectorum Surinamensium as well as a restorative and provenance research summary about the volumes. Both editions show Merian’s talent in painting and observing insects and plants.

On 10 May, I had my first sighting of this year’s periodical cicada in Northern Virginia. For seventeen years, three species of Magicicada, the periodical cicada (M. septendecim, M. cassinii, M. septendecula)[1] have been living about 61 cm (2 feet) underground beneath trees across portions of eastern North America. In May 2021, individuals in Brood X (sometimes known as the Great Eastern Brood) began to emerge in the trillions from their long sojourn when soil temperature reached a consistent temperature of 18 degrees C (64 degrees F) or higher.

The last time Brood X emerged was in 2004. For those who witnessed that appearance, or previous ones, Brood X at times feels like a science fiction movie with the creatures swarming and the loud (up to 90 decibel) mating song of the males drowning out conversations (I wonder how the rest of the world will react to our Zoom call being joined by singing cicadas!).

Magicicada are mostly harmless, neither biting nor stinging. Members of the order Hemiptera, the nymphs spend their underground life harmlessly consuming xylem fluids from the roots of deciduous forest trees; the adult female, which deposits its eggs in small slits cut into the ends of branches, rarely causes damage to mature trees and there is speculation that the cicada pruning leads to more abundant leafing and fruiting the following year.

In the last decades of the 19th century, a monumental publication on the biodiversity of Mexico and Central America began publication—Biologia Centrali-Americana. Published in 215 parts from 1879 to 1915 by the editors Frederick DuCane Godman and Osbert Salvin, the work describes over 50,000 species and is illustrated with over 1,600 lithographic plates depicting over 18,000 species. Remarkable for its time, the title is still vitally important for the study of Neotropical biodiversity today, as it contained virtually all known information at the time about Mexican and Central American flora and fauna.

Biologia Centrali-Americana is a particularly important resource for entomologist Samanta Orellana, a PhD student in evolutionary biology at the Dr. Nico Franz Lab of Arizona State University (ASU) and a research assistant in the ASU Biocollections of the Biodiversity Knowledge Integration Center. Orellana began studying insects and working with entomological collections more than a decade ago, during her undergraduate studies in her home country of Guatemala.

“For many insect groups in Guatemala and the rest of Central America, Biologia Centrali-Americana still represents the only source of information available for the region,” states Orellana.

Dr. Margaret S. Collins (1922-1996), a renowned expert on termite ecology and distribution, taught as a professor and administrator at Howard University, Florida A&M University, and Federal City College (now University of The District of Columbia) for over 35 years. Upon her retirement from teaching, Collins continued her work on termites at the Smithsonian National Museum of Natural History as a research associate from 1983 to 1996.

Over the course of her career, Collins published more than forty articles spanning the biogeography, physiology, chemical defenses, and taxonomy of termites. Collins also collected specimens in the United States, Mexico, Costa Rica, Colombia, Barbados, Belize, Suriname, the Cayman Islands, Guyana, Guatemala, and Panama. When she contracted dengue fever on an expedition in Guyana in 1983-1984 and was forced into a long hiatus from field work, she turned her focus to updating and preserving the termite specimens at the Smithsonian National Museum of Natural History. Eventually Collins returned to field research in 1994 when she once again traveled to Guyana to collect termites. In April 1996, Collins died while conducting field work in the Cayman Islands.

Earlier this year Dr. Simon Leslie, Francis Houssemayne du Boulay’s great-grandson, contacted Melbourne Museum about accessing du Boulay’s hand-painted Coleoptera volumes, held in the Museums Victoria Archives. Dr. Leslie and family accessed the physical volumes in February 2020. While I carefully supervised flipping through the pages of these volumes, I was intrigued by their aesthetic, and scientific and historic, value. Since then, the volumes have been digitised by Biodiversity Heritage Library (BHL) Australia.