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Crematogaster ogatai
| Crematogaster ogatai | |
|---|---|
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Crematogastrini |
| Genus: | Crematogaster |
| Species: | C. ogatai |
| Binomial name | |
| Crematogaster ogatai Hosoishi, 2022
| |
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This species has so far been known only from the type locality. The type series was collected from Tam Dao National Park (21° 21'–42' N, 105° 23'–44' E; 1,000–1,240 m altitude) of northern Vietnam.
Identification
This species is similar to Crematogaster treubi in having the weakly developed occipital carinae, but can be distinguished by the deep metanotal groove, long metanotal gland bulla and globular postpetiole.
Distribution
Distribution based on Regional Taxon Lists
Oriental Region: Vietnam (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
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- ogatai. Crematogaster ogatai Hosoishi, 2022: 61, figs. 1-3 (w.) VIETNAM.
- Type-material: holotype worker, 12 paratype workers.
- Type-locality: holotype Vietnam: Vinh Phuc Prov., Tam Dao (1000-1240 m.), 8.viii.1998 (Sk. Yamane); paratypes with same data.
- Type-depositories: IEHV (holotype); BMNH, IEHV, KUEC, NHMW, SKYC, TNHM (paratypes).
- Distribution: Vietnam.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Holotype: HW 0.88; HL 0.84; CI 105; SL 0.62; SI 71; EL 0.16; PW 0.51; WL 0.91; PSL 0.07; PtL 0.26; PtW 0.32; PtH 0.18; PpL 0.13; PpW 0.28; PtHI 67; PtWI 122; PpWI 217; WI 86. Paratypes (n = 5): HW 0.81–0.91; HL 0.80–0.90; CI 101–108; SL 0.62–0.63; SI 68–77; EL 0.15–0.17; PW 0.49–0.53; WL 0.83–0.97; PSL 0.06–0.08; PtL 0.25–0.29; PtW 0.31–0.32; PtH 0.15–0.17; PpL 0.13–0.16; PpW 0.25–0.28; PtHI 57–67; PtWI 108–130; PpWI 163–221; WI 78–89.
Head slightly broader than long in full-face view (CI 101–108); posterior margin almost straight, angulate posterior corner and convex sides. Frontal carina extending to bottom of eyes. Occipital carina weakly developed, but undeveloped at dorsal portion. Mandible with four teeth; apical and subapical teeth large. Anterior margin of clypeus weakly convex in median portion; anterolateral margin of clypeus protruded anteriad; posterior margin of clypeus rounded between frontal lobes. Compound eyes slightly projecting beyond lateral margins of head in full-face view. Antenna with 11-segmented; antennal club 3-segmented, but appears 2-segmented in one specimen (KUECANT041). Scape reaching posterior corner of head.
Pronotum and mesonotum almost fused without defined suture in dorsal view. In lateral view, promesonotum forming dorsal convex outline. Mesothoracic spiracle circular; its diameter as large as base of propodeal spines. Metanotal groove straight in dorsal view, forming a deep V-shaped concavity between mesonotum and propodeum in lateral view. Metapleural gland bulla developed long, extending to anterodorsal portion of metapleuron. Metapleural gland opening slit-shaped. Propodeal spiracle dorsoventrally oval, with its horizontal diameter 2.0 times larger than vertical diameter, located on posterolateral corner of propodeum in lateral view, close to metapleural gland bulla. Propodeal spine short and stout with thick base, directed dorsolaterally in dorsal view (PSL 0.06–0.08).
Petiole broader anteriorly, but broadest at mid-length, wider than long in dorsal view (PtWI 108–130); spiracle situated at midportion between dorsal and ventral margin of petiole in lateral view, directed laterally. Subpetiolar process short and acute. Postpetiole globular, not bilobed in dorsal view; spiracle situated anteriorly on lateral surface. Petiole wider than postpetiole in dorsal view (WI 78–89).
Dorsal surface of head longitudinally rugose on anterior half, but shagreened weakly shagreened on frons and posterior half; longitudinal rugulae surrounding antennal sockets and gena. Clypeus with weak longitudinal rugulae. Promesonotum shagreened. Lateral surface of pronotum shiny but weakly shagreened. Mesopleuron weakly sculptured with feeble rugulae. Propodeal dorsum and declivity smooth and shiny. Dorsal surface of petiole smooth and shiny. Lateral surface of petiole shiny but weakly shagreened. Dorsal and lateral surfaces of postpetiole shiny but weakly shagreened.
Scape with abundant suberect to decumbent setae. Dorsal face of head with long erect setae and short decumbent setae. Clypeus with suberect setae. Anterior clypeal margin with one median setae and one pair of longer setae, mixed with shorter setae laterally. Dorsum of promesonotum with some pairs of long erect setae and short decumbent setae anteriorly, one pair of lone erect setae posteriorly. Dorsum of propodeum with decumbent setae. Petiole with one pair of long suberect setae posteriorly. Postpetiole with one pair of long suberect setae posteriorly. Fourth abdominal tergite with long erect setae and decumbent to appressed setae.
Body color reddish brown.
Type Material
- Holotype: Worker from Vietnam: Tam Dao (1,000–1,240 m alt.), Vinh Phuc Prov., 8.viii.1998 (Sk. Yamane) (IEBR, KUECANT038).
- Paratypes: Twelve paratype workers: same data as holotype, (BMNH (two paratypes, KUECANT040, KUECANT041), IEBR (one paratype, KUECANT039), KUEC (two paratypes, KUECANT042, KUECANT043), NHMW (two paratypes, KUECANT044, KUECANT045), SKYC (three paratypes, KUECANT046, KUECANT047, KUECANT048), THNHM (two paratypes, KUECANT049, KUECANT050)).
Etymology
The specific name is dedicated to Dr. Kazuo Ogata, who worked on the systematics of Asian ants.