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Strumigenys esrossi
| Strumigenys esrossi | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Attini |
| Genus: | Strumigenys |
| Species: | S. esrossi |
| Binomial name | |
| Strumigenys esrossi Brown, 1957
| |
Known from a few type collections, one of which was from "a nest in a small cavity in the soil, 3 inches below the surface."
Identification
Bolton (2000) - A member of the signeae complex in the Strumigenys godeffroyi-group. This Philippines species shares a lack of standing pilosity and lack of a specialised humeral hair with Strumigenys forficata, Strumigenys degonya and Strumigenys ortholex; see under forficata.
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: 12.879721° to 12.879721°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Indo-Australian Region: Philippines (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
Castes
Worker
  
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| . | Owned by Museum of Comparative Zoology. |
Queen
Images from AntWeb
   
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| Queen (alate/dealate). Specimen code castype06892-01. Photographer April Nobile, uploaded by California Academy of Sciences. | Owned by CAS, San Francisco, CA, USA. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- esrossi. Strumigenys esrossi Brown, 1957g: 114 (w.q.) PHILIPPINES. See also: Bolton, 2000: 820.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
TL 2.2-2.7, HE 0.58-0.65, ML 0.26-0.30, WL 0.58-0.68; CI 70-74, MI 45-46. The larger workers are often lighter and more yellow in color.
Bolton (2000) - TL 2.3-2.5, HL 0.62-0.68, HW 0.44-0.49, CI 71-74, ML 0.28-0.30, MI 43-46, SL 0.34-0.39, SI 76-81, PW 0.25-0.28, AL 0.62-0.71 (6 measured).
Characters of signeae complex. Preapical tooth not adjacent to apicodorsal tooth. Apicoscrobal hair absent; dorsolateral margin of head in full-face view with a row of small, closely applied spoon-shaped hairs only; no freely laterally projecting hairs. Ventrolateral margin of head not concave in front of eye. Cephalic dorsum with appressed or near-appressed spatulate to narrowly spoon-shaped ground-pilosity but without erect hairs, even the usual row near the occipital margin absent. Dorsal alitrunk with sparse, near-appressed ground-pilosity, without standing hairs anywhere, pronotal humeral hair absent. Dorsal surfaces of petiole, postpetiole and first gastral tergite without standing hairs; second tergite to apex with a few short erect hairs. Entire dorsum and side of alitrunk densely reticulate-punctate. Propodeal lamella broad, engaging most of length of spine. With petiole in profile the lateral spongiform lobe is restricted to the posterior third of the length of the node; in the same view anterior face of node shorter than length of dorsum. Petiole node in dorsal view broader than long. Disc of postpetiole finely and densely longitudinally punctulate-costulate. Base of gaster finely and densely striolate; sculpture may be of striolae alone or these may occur between the somewhat more strongly emphasised basigastral costulae; remainder of tergite unsculptured.
Queen
Female, from type nest series: TL 2.8, HE 0.67, ME 0.29, WL 0.69; CI 75, MI 43. Mesonotum with a feeble median sulcus; pilosity as on head, except for a pair of short, tapered, erect hairs on anterior scutum. Nodes broader than in worker; petiolar node about as broad as long. Gaster more opaque, the striolae stronger and extending nearly the whole length of the basal tergite; coarser at extreme base. Anterior gastric dorsum with a widely spaced pair of very small erect clavate hairs. Medium ferruginous; ocelli small, with blackened callus at each.
Type Material
Holotype (California Academy of Sciences) one of 21 workers taken at San Jos, Mindoro I., Philippine Islands, from a nest in a small cavity in the soil, 3 inches below the surface (E. S. Ross leg.). Paratype workers: 20 workers from type nest series; numerous workers from near Dumaguete, Negros Oriental, Philippines (probably chiefly from the Cuernos Mts.) (J. W. Chapman and D. Empeso); one worker from (Museum of Comparative Zoology) miscellany. Victoria, Luzon (Pierce leg.) one worker from Jolo I., Philippines, from stomach of Rana nicrodisca leytensis in MCZ. Paratypes in CAS, National Museum of Natural History, MCZ.
Bolton (2000) - Holotype worker, paratype workers and queen. PHILIPPINES: Mindoro I., San Jose, iv.1945 (E. S. Ross); paratype workers, PHILIPPINES: Negros Oriental, Dumaguete (D. Empeso); Luzon, Victoria, 28.xi. [37?; year number partially illegible] (Pirres); Jolo I., in Rana microdisca leytens is (no collector's name) (Museum of Comparative Zoology, National Museum of Natural History, California Academy of Sciences, Naturhistorisches Museum Wien, Vienna) [examined].
References
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 820, redescription of worker)
- Brown, W. L., Jr. 1957h ("1956"). The Indo-Australian species of the ant genus Strumigenys Fr. Smith: Three new Philippine species. Psyche. 63:113-118. [1957-11-18] (page 114, worker, queen described)
References based on Global Ant Biodiversity Informatics
- Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
- Field Museum Collection, Chicago, Illinois (C. Moreau)