Showing posts with label Tax. Show all posts
Showing posts with label Tax. Show all posts

Tuesday, 24 September 2013

A new species of Dioptinid Moth from Cuba.

Dioptinid Moths are large day flying Moths from the neotropics. They are often brightly coloured, and often mimic unpalatable Moth or Butterfly species. Their larvae are often brightly coloured, and may be toxic.

In a paper published in the journal ZooKeys on 20 September 2013, Rayner Núñez Aguila of the División de Colecciones Zoológicas y Sistemática at the Instituto de Ecología y Sistemática in Havana describes a new species of Dioptinid Moth from western Cuba.

The new species is named Eremonidiopsis aggregata, where 'Eremonidiopsis' means 'resembling Eremonidia'; a Dioptinid Moth from Hispaniola, and 'aggregata' means found in groups. The Moth is described from the male only, which is a 12 mm Insect with a uniform dark brown colouration except for the lower part of the head, which is bright orange. The Moths were found flying in groups of 10-15 individuals around the tops of small trees, 3-4 m above the ground. 

Eremonidiopsis aggregata, male specimen. Núñez Aguila (2013).

They were found at at two separate locations, one in the Pico Cristal National Park near La Zoilita and the other in the Alexander von Humbolt National Park near the Jaguaní river east of La Melba, on the southeastern slope of the El Toldo plateau. Interestingly these two sites have quite different climates, with the Alexander von Humbolt National Park being in lowland rainforest that receives around 3400 mm of rain annually, typically raining on 240 days per year, and has a temperature that varies between 22 and 26°C, while the Pico Cristal National Park site is cooler and drier, typically receiving only 1900 mm of rain per year and with temperatures between 19 and 24°C.

(Top) Habitat in the rainforest of the Alaxander von Humbolt National Park. (Bottom) Habitat in the seasonal dryforest of the Pico Cristal National Park. Núñez Aguila (2013).

Thursday, 4 July 2013

A new species of early Ant from Cretaceous Burmese amber.

Ants are among the most widespread and abundant of Insect groups, with over 13 000 described species. They play a major role in the shaping of modern ecosystems and landscapes, and many other species of animals, plants and even fungi have commensual relationships with Ant species and could not survive without them. Ants become common inclusions in amber from the Miocene onwards, suggesting they underwent a successful adaptive radiation at this time, but earlier Ants are poorly understood. Ants are believed to have derived from Wasp ancestors between 115 and 135 million years ago, although the oldest Ant fossils are only around 100 million years old, and these are rare. 

In a paper published in the journal Zootaxa on 24 June 2013, Phillip Barden and David Grimaldi of the Division of Invertebrate Zoology and Richard Gilder Graduate School at the American Museum of Natural History, describe a new species of Ant from a specimen preserved in 99 million year old amber from Kachin State in northern Myanmar.

The new species is named Zigrasimecia tonsora, where 'Zigrasimecia' means Zigras' Ant, after James Zigras, who provided the specimen from which the species is described, and 'tonsora' means barber-mouthed, in reference to the hairs around the Ants mouth.

Zigrasimecia tonsora is described from a single female specimen, lacking wings. The specimen is about 3 mm long, with a flattened head, am arrangement of setae around the mouth unlike anything seen in modern ants, short antennae and a sting. It is, however, similar to other Cretaceous Ants, notably Sphecomyrmodes, from the same location as Zigrasimecia tonsora, and therefore presumably of the same age, and Gerontoformica, about 100 million years old and from France. Barden and Grimaldi suggest that this morphology may imply that these Cretaceous Ants had a lifestyle different from, and not seen in, modern Ants.

Zigrasimecia tonsora. (A) Lateral view of entire specimen. (B) Close-up image of mesosoma. (C) Enlarged view of clypeal and mandibular structures. (D) Right lateral view of Head. (E) Alternate left lateral view of head. Barden & Grimaldi (2013).


Drawings of Zigrasimecia tonsora. (A) Head, mesosoma, and petiole, right lateral
view. (B) Head and mesosoma, dorsal view. (C) Head, frontal view. Barden & Grimaldi (2013).



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