Overview

Comprehensive Description

Description

Holotype, ♀, length of body 2.0 mm, of fore wing 1.4 mm.  Head. Length of third segment of antenna 0.5 times fourth segment, length of third, fourth and penultimate segments 0.5, 0.8 and 1.0 times their width, respectively, and basal segments with distinct setae; pedicellus distinctly protruding and larger than scapus; face strongly convex and densely setose (Fig. 9), without facial tubercles and bristles; length of eye 2.4 times temple in dorsal view; height of eye about 3.6 times width of temple in lateral view (Fig. 9); vertex superficially granulate and having a satin sheen; temples roundly narrowed behind eyes; OOL:diameter of ocellus:POL = 5:4:20; length of malar space 0.05 times height of eye, eye nearly touching base of mandible.   Mesosoma. Length of mesosoma 1.1 times its height; mesoscutum evenly granulate; scutellum granulate and distinctly convex; precoxal sulcus absent; mesopleuron superficially granulate, but speculum shiny and largely smooth; mesosternal sulcus narrow and micro-crenulate; metanotum without a median carina and longer than dorsal face of propodeum; propodeum finely rugulose, dorsal face much shorter than posterior face, with satin sheen, without a median carina and no medial areola and its spiracle small and far in front of middle of propodeum.   Wings. Fore wing: parastigma comparatively large (Fig. 8); vein SR distinctly pigmented; basal half of wing much less densely setose than its distal half. Hind wing: wing membrane sparsely setose basally.   Legs. Hind coxa partly superficially micro-granulate, nearly smooth and with satin sheen; fore coxa nearly flat ventrally; all tarsal claws slender and simple; length of femur, tibia and basitarsus of hind leg 2.9, 4.5 and 4.0 times their width, respectively; fore femur moderately curved in dorsal view, compressed and apically without tooth; fore tibia without protuberances and evenly densely setose, its length 6.3 times its maximum width in lateral view; fore tarsus 1.9 times as long as middle tarsus and 1.6 times as long as fore tibia; fore tibial spur slightly curved and 0.7 times as long as fore basitarsus and 0.4 times fore tibia (Fig. 12); spurs of hind tibia acute apically, their length 1.1 and 1.0 times hind basitarsus.   Metasoma. Length of first tergite 0.6 times its apical width, its surface with satin sheen, granulate, basally and medially flat, and its spiracles not protruding and near apex of tergite; second and third tergites superficially granulate; second metasomal suture obsolescent; remainder of metasoma largely smooth and depressed; fifth sternite with a large and acute apical spine (Fig. 14); setae of metasoma spread and short; second tergite with sharp lateral crease; length of ovipositor sheath 0.05 times fore wing.   Colour. Black; face, clypeus, labrum, malar space, frons antero-laterally and medially, palpi, propleuron, tegula, wings basally, fore and middle legs white; scapus and pedicellus, and hind leg ivory, but hind tarsus dorsally infuscate; pronotal side with brown patch; veins brown; remainder of antenna, humeral plate largely, metasoma laterally, parastigma and pterostigma largely dark brown; wing membrane subhyaline.  Variation. Length of body 1.8–2.1 mm, of fore wing 1.1–1.4 mm, all females have 12 antennal segments; pronotal side may be largely brown.
Creative Commons Attribution 3.0 (CC BY 3.0)

© José-María Gómez Durán, Cornelis van Achterberg

Source: ZooKeys

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Wikipedia

Kollasmosoma sentum

Kollasmosoma sentum is a parasitoid wasp, from the family Braconidae, which lays its eggs inside living ants. It was featured as one of "the top 10 new species of 2012".[2]

Distribution[edit]

Kollasmosoma sentum is a palearctic species.[1] The first male of Kollasmosoma sentum was discovered in Orgiva in the province of Granada in Spain. The female holotype was discovered later in August 2010 in Madrid, at the site of the Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria followed by the collection of another seven females in September 2010.[1]

Description[edit]

K. sentum has a length of 1.8 to 2.1 millimetres (0.071 to 0.083 in) with forewing length from 1.1 to 1.4 millimetres (0.043 to 0.055 in). The antennae of all females have 12 segments. The face is convex and the head is bristly.[1]

While the body of K. sentum is black in colour, the face, the face plate (clypeus), the labrum , the malar space (area between the compound eyes and the mandibles), the frons (antero-lateral and medial), the palps , the propleuron, the tegulae , the basal area of the wing and the front and center legs are coloured white.[1]

The scape and pedicel of the antenna, and the tarsi of the hind legs are ivory coloured, the tarsi dorsally obscured. The sides of the pronotum have a brown spot laterally; in some individuals the pronotum may be colored brown also extended to the sides. The veins of the nearly transparent wings are brown, the remaining antenna segments, large parts of the humeral plate, the sides of the mesosoma , the parastigma and the pterostigma are colored extended dark brown. The mesosoma is about 10% longer than its height. The first tergite of the metasoma is 0.6 times as long as the width of the apex.[1]

K. sentum can be differentiated from other species of the genus by the following characteristics:[1]

  • The outer spine of the tibiae of the hind legs is normally built in females and apically pointed;
  • the fifth sternite of the metasoma in females has an apical spine;
  • the face is strongly convex;
  • the compound eyes are about 3.6 times higher than the width of the temple;
  • The dorsal side of the propodeum is shorter than the metanotum;
  • the pedicel is distinctly pronounced in females &
  • the tarsi of the front legs in the females are 1.9 times as long as the tarsi of the middle legs.

Behaviour[edit]

Females of Kollasmosoma sentum have been observed parasitising the ant Cataglyphis ibericus (Emery, 1906). Wasps act either singly or in a small group of two to three. They scout the nest entrances and areas nearby during the hottest hours of the day looking for worker ants on their way out to forage or while returning laden with food to the nest. The visits typically last from half an hour to 90 minutes. Cataglyphis ants move speedily along but have a characteristic pattern of brief halts which are used by the Kollasmosoma for attacking the ants.[1]


References[edit]

  1. ^ a b c d e f g h Cees van Achterberg & José-María Gómez Durán (2011). "Oviposition behaviour of four ant parasitoids (Hymenoptera, Braconidae, Euphorinae, Neoneurini and Ichneumonidae, Hybrizontinae), with the description of three new European species". ZooKeys 125: 59–106. doi:10.3897/zookeys.125.1754. PMC 3185369. PMID 21998538. Retrieved 10 October 2014. 
  2. ^ Colin Lecher (24 May 2012). "Gallery: The Top 10 New Species Of 2012". Popular Science. Retrieved 10 October 2014. 
Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!