Difference between revisions of "Cephalotes insularis"

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===Description===
 
===Description===
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====Worker====
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de Andrade and Baroni Urbani (1999) - Vertexal angles round, with superficially crenulate border. Vertexal border straight and variably marginate medially. Hypostoma not connected by a bridge. Cheeks superficially marginate dorsally. Frontal carinae with a superficial notch over the eyes. Antennal scrobes reaching the antero-ventral border of the eyes. Clypeal border concave. Mandibles with faint lateral carinae.
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Mesosoma convex in side view. Pronotum in dorsal view with the anterior border not marginate and convex. Scapular angles absent or not visible in dorsal view. Pronotum with a narrow lamellae bearing three pairs of lateral teeth, the first, humeral, short and pointed, followed by another subequal in length or smaller, variably pointed and by a third broad, obtuse or slightly pointed pair close to the mesonotum. Sides of the mesonotum converging posteriorly and unarmed. Promesonotal and propodeal sutures in dorsal view superficially marked in some specimens only, more impressed on the sides. Propodeum declivous, without distinctly differentiated basal and declivous faces, with a pointed, thin spine directed laterally and slightly upwards at midlength.
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Petiole anteriorly truncate; its anterior border marked by a transversal carina variably marked. Petiolar spines ca. half so long as the length of the petiole, thin, pointed backwards and on the middle of the petiolar sides. Postpetiole broader than petiole, with thin, pointed spines slightly shorter than the postpetiolar length, arising anterolaterally and curved backwards at the base.
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Gaster oval, without crest, lobe or lateral margin.
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Hind and mid femora without angle or denticles; mid and hind basitarsi long and without flat and broad base.
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Sculpture. Head dorsum reticulate, with irregular, superficial foveae separated by broad reticulation. Frontal carinae superficially reticulate. Ventral face of the head irregularly striata-rugose and reticulate, the reticulation more impressed in larger specimens. Mesosoma minutely reticulate, irregularly foveolate, the foveae separated by broad reticulation forming longitudinal rugae on the posterior half of the pronotum and on the propodeum; in small specimens the foveae less evident. Same sculpture but more superficial on the pedicel. Sides of the mesosoma with the same sculpture as on the dorsum, but with few or without striae on the upper meso- and metapleurae. First gastral tergite and sides of the first gastral sternite with longitudinal, thin rugosities, irregular and less impressed on the middle of the posterior half of the first gastral tergite in some specimens. Anterolateral borders of the first gastral tergite and central part of the first sternite superficially reticulate and shining. Legs reticulate, with slightly shining femora. Distal part of the outer face of the femora and outer face of the tibiae with oval and superficial foveae.
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Pilosity. Body with four types of hairs: (1) sparse, long, erect and truncate on the head, on the mesosoma, on the pedicel, on the gastral tergites and on the legs; (2) similar to the type (1) but thinner and shorter on the sternites; (3) canaliculate, appressed, thick, denser on the vertexal border, on the mesosoma and on the pedicel; (4) similar hairs to the type (3) but shorter and thinner on the frons, on the gaster and on the legs.
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Colour. Dark brown to black. Frontal carinae yellowish to light ferruginous and semitransparent. Legs orange or ferruginous or light brown with darker basitarsi. Border of the first gastral tergite yellowish and transparent. Some specimens with the anterolateral border of the first gastral tergite with a pair of oval, orange-reddish spots. Vertexal angles, propodeum and pedicel with weak golden reflexes.
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Measurements (in mm) and indices: TL 4.08-4.94; HL 1.00-1.20; HW 1.04-1.32; EL 0.28-0.33; PW 0.88-1.18; PeW 0.56-0.62; PpW 0.68-0.74; HBaL 0.44-0.48; HBaW 0.09-0.10; CI 104.0-111.1; PI 111.8-118.2; PPeI 157.1-190.3; PPpI 129.4-159.4; HBaI 20.4-20.8.
  
 
==References==
 
==References==

Revision as of 13:14, 10 September 2013


Cephalotes insularis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Cephalotini
Genus: Cephalotes
Species: C. insularis
Binomial name
Cephalotes insularis
(Wheeler, W.M., 1934)

Identification

Distribution

This taxon was described from Mexico.

Check distribution from AntMaps.

{{#display_map: |width=600 |height=500 |centre=0,0 |gkml=http://www.antweb.org/googleEarth.do?google=genus=Cephalotes---species=insularis |kmlrezoom=yes |zoom=1 |resizable=yes |controls=pan, zoom, type, scale |markercluster=yes }}

Check specimen data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • insularis. Cryptocerus pilosus subsp. insularis Wheeler, W.M. 1934f: 140 (w.) MEXICO. Combination in Paracryptocerus (Harnedia): Kempf, 1958a: 128; in Zacryptocerus: Brandão, 1991: 386; in Cephalotes: De Andrade & Baroni Urbani, 1999: 583. Raised to species: Kempf, 1958a: 128.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

de Andrade and Baroni Urbani (1999) - Vertexal angles round, with superficially crenulate border. Vertexal border straight and variably marginate medially. Hypostoma not connected by a bridge. Cheeks superficially marginate dorsally. Frontal carinae with a superficial notch over the eyes. Antennal scrobes reaching the antero-ventral border of the eyes. Clypeal border concave. Mandibles with faint lateral carinae.

Mesosoma convex in side view. Pronotum in dorsal view with the anterior border not marginate and convex. Scapular angles absent or not visible in dorsal view. Pronotum with a narrow lamellae bearing three pairs of lateral teeth, the first, humeral, short and pointed, followed by another subequal in length or smaller, variably pointed and by a third broad, obtuse or slightly pointed pair close to the mesonotum. Sides of the mesonotum converging posteriorly and unarmed. Promesonotal and propodeal sutures in dorsal view superficially marked in some specimens only, more impressed on the sides. Propodeum declivous, without distinctly differentiated basal and declivous faces, with a pointed, thin spine directed laterally and slightly upwards at midlength.

Petiole anteriorly truncate; its anterior border marked by a transversal carina variably marked. Petiolar spines ca. half so long as the length of the petiole, thin, pointed backwards and on the middle of the petiolar sides. Postpetiole broader than petiole, with thin, pointed spines slightly shorter than the postpetiolar length, arising anterolaterally and curved backwards at the base.

Gaster oval, without crest, lobe or lateral margin.

Hind and mid femora without angle or denticles; mid and hind basitarsi long and without flat and broad base.

Sculpture. Head dorsum reticulate, with irregular, superficial foveae separated by broad reticulation. Frontal carinae superficially reticulate. Ventral face of the head irregularly striata-rugose and reticulate, the reticulation more impressed in larger specimens. Mesosoma minutely reticulate, irregularly foveolate, the foveae separated by broad reticulation forming longitudinal rugae on the posterior half of the pronotum and on the propodeum; in small specimens the foveae less evident. Same sculpture but more superficial on the pedicel. Sides of the mesosoma with the same sculpture as on the dorsum, but with few or without striae on the upper meso- and metapleurae. First gastral tergite and sides of the first gastral sternite with longitudinal, thin rugosities, irregular and less impressed on the middle of the posterior half of the first gastral tergite in some specimens. Anterolateral borders of the first gastral tergite and central part of the first sternite superficially reticulate and shining. Legs reticulate, with slightly shining femora. Distal part of the outer face of the femora and outer face of the tibiae with oval and superficial foveae.

Pilosity. Body with four types of hairs: (1) sparse, long, erect and truncate on the head, on the mesosoma, on the pedicel, on the gastral tergites and on the legs; (2) similar to the type (1) but thinner and shorter on the sternites; (3) canaliculate, appressed, thick, denser on the vertexal border, on the mesosoma and on the pedicel; (4) similar hairs to the type (3) but shorter and thinner on the frons, on the gaster and on the legs.

Colour. Dark brown to black. Frontal carinae yellowish to light ferruginous and semitransparent. Legs orange or ferruginous or light brown with darker basitarsi. Border of the first gastral tergite yellowish and transparent. Some specimens with the anterolateral border of the first gastral tergite with a pair of oval, orange-reddish spots. Vertexal angles, propodeum and pedicel with weak golden reflexes.

Measurements (in mm) and indices: TL 4.08-4.94; HL 1.00-1.20; HW 1.04-1.32; EL 0.28-0.33; PW 0.88-1.18; PeW 0.56-0.62; PpW 0.68-0.74; HBaL 0.44-0.48; HBaW 0.09-0.10; CI 104.0-111.1; PI 111.8-118.2; PPeI 157.1-190.3; PPpI 129.4-159.4; HBaI 20.4-20.8.

References

The following references are based on the 2007 CD version of the New General Catalogue.

  • Brandão, C. R. F. 1991. Adendos ao catálogo abreviado das formigas da região Neotropical (Hymenoptera: Formicidae). Rev. Bras. Entomol. 35: 319-412 (page 386, Combination in Zacryptocerus)
  • De Andrade, M. L.; Baroni Urbani, C. 1999. Diversity and adaptation in the ant genus Cephalotes, past and present. Stuttg. Beitr. Naturk. Ser. B (Geol. Paläontol.) 271: 1-889 (page 583, Combination in Cephalotes)
  • Kempf, W. W. 1958a. New studies of the ant tribe Cephalotini (Hym. Formicidae). Stud. Entomol. (n.s.) 1: 1-168 (page 128, Combination in Paracryptocerus (Harnedia))
  • Kempf, W. W. 1958a. New studies of the ant tribe Cephalotini (Hym. Formicidae). Stud. Entomol. (n.s.) 1: 1-168 (page 128, Raised to species)
  • Wheeler, W. M. 1934f. Ants from the islands off the west coast of Lower California and Mexico. Pan-Pac. Entomol. 10: 132-144 (page 140, worker described)

Additional References

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