Strumigenys dohertyi

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Strumigenys dohertyi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. dohertyi
Binomial name
Strumigenys dohertyi
Emery, 1897

Strumigenys dohertyi casent0900105 p 1 high.jpg

Strumigenys dohertyi casent0900105 d 1 high.jpg

Specimen Labels

Synonyms

One of the commonest, most widely distributed and most variable species of Pyramica (=Smithistruma) in the region.

Identification

Bolton (2000) - The noted characters will isolate the species as it is presently delimited, but marked variation in some features suggests that more than one real species may currently be concealed under the name dohertyi. If so, such species cannot be separated with any degree of confidence using the material currently available, which is best regarded as comprising a single taxon for present purposes. Apart from size variation (see measurements above), the following are also variable.

1 The petiole node in dorsal view varies from slightly longer than broad to slightly broader than long; the length of the petiole node dorsum in profile varies accordingly. This character is stable within series but varies between them. It does not appear to be geographical in nature, nor does it appear significantly size-related, although smaller individuals tend to have shorter nodes.

2 The peduncle of the petiole varies slightly in length relative to the length of the node. Smaller workers tend to have relatively slightly shorter petiolar peduncles, but this is not universal.

3 The katepisternum is smooth and shining but the metapleuron and side of the propodeum vary from completely reticulate-punctate to almost entirely smooth, with grades between these extremes. This feature may in some way be altitude-related as samples from high on mountains generally have smoother pleurae than those from the lowlands.

4 The disc of the postpetiole in dorsal view varies from glassy smooth to finely longitudinally costulate, with all intermediates of sculptural density and intensity being exhibited. Sometimes different forms of postpetiolar sculpture occur in single series of workers, with some individuals showing a smooth, and others a weakly costulate, disc.

5 The first gastral tergite may have 3 or 4 transverse rows of standing hairs, three being the most frequent. This does not appear to be size-dependent, and again at least one series shows both counts in different workers.

Keys including this Species

Distribution

Southern China, Burma (= Myanmar), Thailand, Peninsular Malaysia, the large islands of Borneo, Java and Sumatra, and into the Philippines.

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Indonesia, Malaysia, Philippines.
Oriental Region: Bhutan, Myanmar (type locality), Thailand, Vietnam.
Palaearctic Region: China.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

The type material of a synonym (S taipingensis) was found in the rotten wood of an old tree.

Castes

Worker

Nomenclature

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

  • dohertyi. Strumigenys dohertyi Emery, 1897c: 576 (w.) MYANMAR. Combination in S. (Cephaloxys): Emery, 1924d: 325; in Smithistruma: Brown, 1948e: 105; in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 118. Senior synonym of inezae, lamellignatha, taipingensis: Bolton, 2000: 397. See also: Brown, 1953g: 121.
  • inezae. Strumigenys inezae Forel, 1905c: 12 (w.) INDONESIA (Java). Combination in S. (Cephaloxys): Emery, 1924d: 325; in Smithistruma: Brown, 1948e: 105; in Pyramica: Bolton, 1999: 1673. Junior synonym of dohertyi: Bolton, 2000: 397. See also: Brown, 1953g: 121.
  • taipingensis. Strumigenys inezae var. taipingensis Forel, 1913k: 83 (w.) WEST MALAYSIA. Imai, Brown, et al. 1984: 68 (k.). Combination in S. (Cephaloxys): Emery, 1924d: 325; in Smithistruma: Brown, 1948e: 105. Raised to species: Brown, 1953g: 122. Junior synonym of dohertyi: Bolton, 2000: 397.
  • lamellignatha. Smithistruma (Smithistruma) lamellignatha Brown, 1953g: 119, pl. 3, fig. 33 (w.q.m.) BORNEO. Combination in Pyramica: Bolton, 1999: 1673. Junior synonym of dohertyi: Bolton, 2000: 397.

Type Material

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

Description

Worker

Bolton (2000) - TL 2.0-3.0, HL 0.52-0.72, HW 0.42-0.58, CI 78-84, ML 0.12-0.20, MI 23-28, SL 0.26-0.42, SI 62-72, PW 0.29-0.41, AL 0.58-0.86 (30 measured).

Apicoscrobal hair flagellate. Eye with 3-5 ommatidia in the longest row. Dorsum of head in profile with a transverse row of 4 standing hairs in front of the occipital margin, and with a pair of standing hairs just in front of the highest point of the vertex. Pronotal humeral hair flagellate. Dorsum of pronotum with a weak median longitudinal carina, best developed anteriorly and may be faint in some samples. Mesonotum with 2 pairs of elongate standing hairs that are usually somewhat thickened apically; the posterior pair generally distinctly longer than the anterior pair. Lamella of propodeal declivity a mere ridge or vestigial. Subpetiolar spongiform strip complete, deepest below the peduncle, narrowing or indented approximately below the anterior face of the node.

Karyotype

  • n = 12, 2n = 24 (Malaysia) (Imai et al., 1983) (as Strumigenys taipingensis).

References

  • Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria” 99:1-191.
  • Bolton, B. 1998b. A preliminary analysis of the ants of the Pasoh Forest Reserve. Pp. 84-95 in: Lee, S. S.; Dan, Y. M.; Gauld, I. D.; Bishop, J. (eds.) Conservation, management and development of forest resources. Proceedings of the Malaysia-United Kingd (page 92, Combination in Trichoscapa)
  • Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 3 33: 1639-1689 (page 1673, combination in Pyramica)
  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 397, figs. 248, 282 redescription of worker, senior synonym of inezae, taipingenis, and lamellignatha)
  • Brown, W. L., Jr. 1948e. A preliminary generic revision of the higher Dacetini (Hymenoptera: Formicidae). Trans. Am. Entomol. Soc. 74: 101-129 (page 105, combination in Smithistruma (Smithistruma))
  • Brown, W. L., Jr. 1953g. Revisionary studies in the ant tribe Dacetini. Am. Midl. Nat. 50: 1-137 (page 121, redescription of worker)
  • Emery, C. 1897c. Formicidarum species novae vel minus cognitae in collectione Musaei Nationalis Hungarici quas in Nova-Guinea, colonia germanica, collegit L. Biró. Természetr. Füz. 20: 571-599 (page 576, worker described, diagnosis in key)
  • Emery, C. 1924f [1922]. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 325, combination in Strumigenys (Cephaloxys), catalogue)