José Celestino Mutis, the ants, and Pheidole mutisi sp. nov.

José Celestino Mutis, las hormigas y Pheidole mutisi n. sp.

FERNANDO FERNÁNDEZ¹ and EDWARD O. WILSON²

¹ Biólogo, Ph. D. Instituto de Ciencias Naturales. Universidad Nacional de Colombia. Apartado 7495. Bogotá D.C. Colombia. ffernandezca@unal.edu.co.

² Biólogo, Ph. D. Museum of Comparative Zoology. Harvard University. Cambridge, MA, USA. eowilson@oeb.edu.

Abstract: A new ant species, Pheidole mutisi (Hymenoptera: Formicidae: Myrmicinae), is described in honor of José Celestino Mutis, the Neogranadian “Wiseman” who conducted the first studies on ants in the New World, although his writings on the subject remained unknown for many years. Here we offer some general comments about Mutis’ myrmecological studies. This publication commemorates the 200th anniversary of Mutis’ death. The new species is characterized by its smooth, shiny body without standing pilosity (major) and long propodeal spines (major and minor).

Resumen: Se describe una nueva especie de hormiga, Pheidole mutisi (Hymenoptera: Formicidae: Myrmicinae), en honor del sabio naturalista José Celestino Mutis, quien realizó las primeras observaciones sobre hormigas en el Nuevo Mundo, aunque sus escritos permanecieron desconocidos por mucho tiempo. Se ofrecen algunos comentarios generales sobre las observaciones mirmecológicas de Mutis. Con esta publicación se conmemoran los 200 años de la muerte de Mutis. La nueva especie se separa por su cuerpo liso y brillante, sin pilosidad conspicua (soldado), así como las largas espinas propodeales (soldado y obrera).

Palabras clave: Formicidae. Nueva Especie. Myrmicinae. Colombia.

Introduction

“In his first letter to me, my dear gentlemen Linnaeus,
whom I respect as a mentor, asked if I would work
on a memoir on the ants of America...”.
(Mutis, letter to von Pajkull).

November 11, 2008 marks the 200th anniversary of the death of naturalist José Celestino Mutis, leader of the Botanical Expedition in New Granada and pioneer of natural sciences in America. To commemorate this occasion we present a brief profile of Mutis as a pioneer in the study of ants, and describe a new species of ant in his honor.

Mutis, the first years

When the archbishop Messia de la Cerda brought José Celestino Mutis into his retinue in 1760 and asked if he would accompany him to the New World as his personal physician, he never imagined that this same man would achieve anything beyond looking after his basic medical care. Mutis did faithfully serve his employer as a physician in the territory of New Granada (now Colombia, Venezuela and Ecuador), but it was his passion for nature, the new nature of a New World, that inspired him to embark for the Americas without thinking twice. So accomplished was he in his scholarly pursuits that he soon became known as “Mutis the Wiseman.”

In addition to being a physician and a priest, Mutis was a naturalist with broad interests in astronomy, mathematics, meteorology, mineralogy, botany and zoology, especially entomology. With a great passion for the observation and study of nature, Mutis was in his element: the exuberant and littleexplored lands of the tropics. The epic days of Discovery and of The Conquest had already passed and the Americas had become great fiefdoms for the European powers, ripe for exploitation.

Mutis arrived with a desire to speak of new ideas, perceived to be dangerous, such as the ideas of Copernicus (who attracted the ire of the Inquisition) and wanting to understand “the curiosities of Nature.” He had to wait almost 20 years until finally, in 1783, the extraordinary scientific adventure that would be called “The Botanical Expedition” would begin. Under his guidance, native peoples worked alongside those with formal training to study on a grand scale (in space and time) the flora, fauna, and minerals of the Nuevo Reino.

While Mutis was waiting patiently for the Spanish crown to authorize the expedition and send resources, he spent several years in the mines of El Sapo, in the north of Tolima, in central Colombia, “administering” the mines, although this was really an excuse to dedicate himself to the observation of nature and its creatures (Hernández de Alba 1983a, b).

In reading Mutis’ memoirs and other writings, and the works of Mutis scholars, we see the image of a man profoundly interested in the fauna of this new territory, especially its insects. Hernández de Alba (1983c:265) unapologetically referred to him as “Mutis the entomologist,” and based on reading Mutis’ Journal of Observations, we venture to say that the Wiseman himself would have been flattered to have been called “Mutis the myrmecologist,” or “Mutis the ant scholar.” In one of his letters he writes, “[I] am determined [to continue] our correspondence about the insects; they have drawn all of my affection, without detracting from my interest in the other branches of natural history (Hernández de Alba 1983c).

Mutis the myrmecologist

Mutis spent six years, from 1777 forward, in the Cerro El Sapo (Toad Mountain), as foreman of the mines of the same name. Approximately 420 species of plants and more than 80 animals have been recorded from this locality (Echeverry, without date). An additional 24 “groups” (species, forms) of ants were documented from this locality, as recounted in History of the Ants, prompting Mutis to exclaim that this mountain should have been called “Ant Mountain” (Hernández de Alba 1983c). In subsequent years, the Botanical Expedition would radiate from this locality, covering a broad area between Tolima and Cundinamarca. From those explorations came many observations that enriched our concepts of variation within insects and other groups of arthropods.

In a letter to the Baron von Pujkall, Mutis writes excitedly that his exploration of the world of the ants began at the request of the naturalist Carl Linnaeus. In fact, in his first letter to Mutis, Linnaeus asked his colleague on the other side of the world to prepare a memoir (synopsis) of the American ants. Linnaeus was as eager to receive specimens and notes about ants of New Granada, as he was to receive plant specimens! It seems that Mutis took the request to heart and his enthusiasm is evident in his Journal of Observations, in which he reports on as many as twenty ant species (Hernández de Alba 1983a).

Unfortunately Mutis’ original “memoir” on ants was lost. Nevertheless, a second memoir remained behind (Hernández de Alba 1983c:265-268), as did his Journal of Observations, in which Mutis compiled a series of observations and meditations that comprise the first written treatment of American ants (Hernández de Alba 1983a, b). The Wiseman observed, collected, compared, made microscopic examinations, interviewed native people and returned continually to the field, making quantitative and qualitative notes. Some of his observations were original, new and unique; others were new to him, although already known in the Old World. As such, Mutis at times lamented his isolation and limited access to books (although his ca. 200 books at El Sapo were a luxury).

Mutis was the first to establish, for example, the nomadic character of the legionary ants (Eciton), referring to insects that “had no fixed home” and noting how their hordes destroyed everything they encountered. He also wrote about subterranean legionnaires, lustrous ants that do not sting, but bite, and that we now call Labidus. He was particularly intrigued by the habits of the leaf-cutter ants and marveled at their complex nests; through observation and comparative study, he worked out the nature of their caste system, including the queen, the males, the soldiers and the workers. Early on, Mutis warned about the danger these ants present to mankind, by causing major crop damage.

Reading his scientific writings (Hernández de Alba 1983c) and his Journal, we estimate that about twenty ant species, perhaps more, were examined by The Wiseman (Table 1). In weighing Mutis’ contribution to myrmecology, we have to take into account several handicaps: the scarcity of time he was able to devote to the ants, given his many other tasks and responsibilities and, above all, the diminutive size of the ants, which makes description a great challenge. In interpreting his notes, we should also remember that, for many of his ants, Mutis had to resort to native names or apply names of his own, since the science of classification was just emerging in Europe with the publication of Carl Linnaeus’ Systema Naturae.