Cryptomyrmex longinodus

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Cryptomyrmex longinodus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Cryptomyrmex
Species: C. longinodus
Binomial name
Cryptomyrmex longinodus
(Fernández & Brandão, 2003)

Cryptomyrmex longinodus casent0103517 profile 1.jpg

Cryptomyrmex longinodus casent0103517 dorsal 1.jpg

Specimen Label

The Brazil specimens from Manaus were collected from soil samples in a locality whose ant fauna is otherwise well-known. No other specimen of this rather distinctive species has ever been collected by traditional techniques. (Fernández 2003)

Identification

Fernández (2004) - Distinguished from Cryptomyrmex boltoni by the smooth and shining thorax, without conspicuous and long rugulae on the sides of the propodeum and mesosoma. The propodeal spines are approximately as long or slightly longer than their bases.

Keys including this Species

Distribution

Brazil: Bahia and Amazonas.

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality).

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Males have yet to be found for this species.

Nomenclature

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

  • longinodus. Adelomyrmex longinodus Fernández & Brandão, in Fernández, 2003b: 20, figs. 57-61, 64, 74 (w.q.) BRAZIL. Combination in Cryptomyrmex: Fernández, 2004b: 332.

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

Description

Worker

(Paratypes= 4). HL 0.55–0.57 HW 0.50–0.52 SL 0.36–0.37 EL 0.04 –0.05 WL 0.63–0.67 GL 0.50–0.55 TL 2.30–2.44 CI 90–91 SI 71–72.

Head with convex posterior and evenly rounded corners. Hypostomal bridge strong and evenly developed; very much distinct from head venter. Hypostomal teeth absent. Sides of head slightly concave before the eyes, slightly convex past eyes. Mandibles with 4 teeth decreasing in size from the apical teeth, the antepenultimate (subbasal) smallest. Mandibles with tooth in their basal margin, not followed by a notch. Palp formula 1,2. Maxillary palpomere subcylindrical and the labial palps geniculate; the apical segment much enlarged and globose. Eyes lenses absent, although the pigments are clearly visible under the reflective light, but not under the SEM picture. Clypeus short, elevated in the middle as a narrow stripe, pointed and fused with frontal carinae. Anterior margin of the clypeus without teeth, although with feebly projections instead. Dorsal view of thorax as in Fig. 60. From above, the promesonotum is heart shaped, ending in a triangular mesonotum. Pronotal humeri very broadly rounded in dorsal view, the dorsal alitrunk pinched in at the metanotal line. Propodeum spiracle relatively large, its orifice circular and situated just above the midlength of the sclerite; propodeum dorsum straight, meeting declivity in sharp diverging teeth, gently curved inwards when seen from above; declivity smooth, the metapleural lobes not joined over the foramen. Opening of the metapleural gland indistinct (Fig. 61). Petiole with a short anterior peduncle, lacking an anteroventral process; petiolar node subquadrate, dorsally broadly convex in profile until it approaches the postpetiole where it ends abruptly in a right angle. Postpetiole low and small, gently convex in profile, in dorsal view very broadly attached to the gaster. In profile the postpetiole articulated medially on the first gastral segment. Sting large and strongly sclerotized, disproportionately powerful. Head, most of promesonotum, sides of pronotum and gaster smooth and shining; propodeal triangle and sides of petiole and postpetiole with coarse rugae more or less longitudinal on petiole and postpetiole. Posterior face of propodeum deep, smooth and shining. Petiole with rugulae concentric around node, dorsally transverse and longitudinal on sides; sides of postpetiole with oblique rugulae, smooth and shining in the top, mandibles smooth and shining. Abundant fine hairs long and flexuous on body, shorter and appressed on antennae and legs. Body dark brown (including hairs), antennae and legs lighter.

Queen

Paratype. HL 0.54 HW 0.51 SL 0.22 WL 0.66.

Larger, but not very much, than conspecific worker. Compound eyes with several facets over the largest diameter. Otherwise description as worker.

Type Material

Holotype worker: BRASIL: Amazonas, near Manaus, 1.iii.94, R. Didham leg. (deposited in The Natural History Museum). Paratypes: 7 paratype w, same data as holotype, deposited in BMNH, Museum of Comparative Zoology, Museu de Zoologia da Universidade de Sao Paulo, Insect Collection, Instituto de Ciencias Naturales, Philip S. Ward Collection. 1 paratype q and 6 paratype w, BRAZIL: Amazonas, Manaus, Shift 52, Floresta Berlese funnel No. 04, 03.iii.98, M: García et al. leg., deposited as follow: 1 worker in Instituto Nacional de Pesquisas da Amazonia, 3 workers (2 coated with gold) and dealated queen in MZSP, 1 worker in Humboldt Institute, 1 worker in Staatliches Museum für Naturkunde Karlsruhe. 1 worker, BRAZIL: Amazonas, Manaus, Rs 3114 20, i.1994 A.B. Casimiro (Deposited in CEPLAC). 1 worker, BRAZIL: Espiritu Santo, Linhares, 7.vii.1994, A.B. Casimiro No. 4869 (Deposited in CEPLAC).

References

  • Fernández, F. 2003b. Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae). Zootaxa 361: 1-52 (page 20, figs. 57-61, 64, 74 worker, queen described)
  • Fernández, F. 2004b. Adelomyrmecini new tribe and Cyrptomyrmex new genus of myrmicine ants (Hymenoptera: Formicidae). Sociobiology 44(2): 325-335 (page 332, new combination in Cryptomyrmex)