Crematogaster biroi

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Crematogaster biroi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species group: biroi
Species: C. biroi
Binomial name
Crematogaster biroi
Mayr, 1897

Crematogaster biroi casent0902116 p 1 high.jpg

Crematogaster biroi casent0902116 d 1 high.jpg

Specimen Labels

Synonyms

Nests in soil.

Identification

Hosoishi and Ogata (2016) - In the worker this species is very distinct among the Crematogaster biroi group in having the sculptured surface near occipital carinae of head, the strongly developed subpetiolar process, and acutely developed subpostpetiolar process.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 32.7009° to 8.35°.

   
North
Temperate 		North
Subtropical 		Tropical South
Subtropical 		South
Temperate

Distribution based on Regional Taxon Lists

Oriental Region: India (type locality), Pakistan, Sri Lanka (type locality), Taiwan.
Palaearctic Region: China.

Distribution based on AntMaps

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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

In this and other species belonging to the subgenus Orthocrema, a third caste exists in addition to winged queens and workers; it is intermediate in size, weight and morphology. These individuals are numerically few in the colonies, and lay many unfertilized eggs that are mostly eaten by larvae. Histology confirmed the lack of a spermatheca. Using scanning electron microscopy and ovarian dissections, Peeters et al. (2013) showed that this third caste is a patchwork of queen-like and worker-like traits (refer to Crematogaster pygmaea). It is a soldier caste with a specialized trophic function.

Castes

Worker

Images from AntWeb

Crematogaster biroi casent0906675 h 1 high.jpgCrematogaster biroi casent0906675 p 1 high.jpgCrematogaster biroi casent0906675 d 1 high.jpgCrematogaster biroi casent0906675 l 1 high.jpg
Worker. Specimen code casent0906675. Photographer Michele Esposito, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Crematogaster biroi casent0906676 h 1 high.jpgCrematogaster biroi casent0906676 p 1 high.jpgCrematogaster biroi casent0906676 d 1 high.jpgCrematogaster biroi casent0906676 l 1 high.jpg
Worker. Specimen code casent0906676. Photographer Michele Esposito, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.
Crematogaster biroi casent0907506 h 1 high.jpgCrematogaster biroi casent0907506 p 1 high.jpgCrematogaster biroi casent0907506 d 1 high.jpgCrematogaster biroi casent0907506 l 1 high.jpg
Syntype of Crematogaster biroi smythiesii. Worker. Specimen code casent0907506. Photographer Will Ericson, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.
Crematogaster biroi casent0908367 h 1 high.jpgCrematogaster biroi casent0908367 p 1 high.jpgCrematogaster biroi casent0908367 d 1 high.jpgCrematogaster biroi casent0908367 l 1 high.jpg
Lectotype of Crematogaster biroi bandarensis. Worker. Specimen code casent0908367. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.
Crematogaster biroi casent0908368 h 1 high.jpgCrematogaster biroi casent0908368 p 1 high.jpgCrematogaster biroi casent0908368 d 1 high.jpgCrematogaster biroi casent0908368 l 1 high.jpg
Lectotype of Crematogaster biroi quadriruga. Worker. Specimen code casent0908368. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.
Crematogaster biroi casent0912752 h 1 high.jpgCrematogaster biroi casent0912752 p 1 high.jpgCrematogaster biroi casent0912752 d 1 high.jpgCrematogaster biroi casent0912752 l 1 high.jpg
Syntype of Crematogaster biroi andelis. Worker. Specimen code casent0912752. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by NHMB, Basel, Switzerland.
Crematogaster aitkenii casent0907504 h 1 high.jpgCrematogaster aitkenii casent0907504 p 1 high.jpgCrematogaster aitkenii casent0907504 d 1 high.jpgCrematogaster aitkenii casent0907504 l 1 high.jpg
Lectotype of Crematogaster aitkenii. Worker. Specimen code casent0907504. Photographer Will Ericson, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.

Queen

Images from AntWeb

Crematogaster urvijae casent0914079 h 1 high.jpgCrematogaster urvijae casent0914079 p 1 high.jpgCrematogaster urvijae casent0914079 d 1 high.jpgCrematogaster urvijae casent0914079 l 1 high.jpg
Worker. Specimen code casent0914079. Photographer Z. Lieberman, uploaded by California Academy of Sciences. Owned by NHMUK, London, UK.
Crematogaster biroi casent0907507 h 1 high.jpgCrematogaster biroi casent0907507 p 1 high.jpgCrematogaster biroi casent0907507 d 1 high.jpgCrematogaster biroi casent0907507 l 1 high.jpg
Syntype of Crematogaster biroi smythiesii. Queen (ergatoid). Specimen code casent0907507. Photographer Will Ericson, uploaded by California Academy of Sciences. Owned by MHNG, Geneva, Switzerland.

Male

Images from AntWeb

Crematogaster biroi casent0906677 h 1 high.jpgCrematogaster biroi casent0906677 p 1 high.jpgCrematogaster biroi casent0906677 p 2 high.jpgCrematogaster biroi casent0906677 p 3 high.jpgCrematogaster biroi casent0906677 d 1 high.jpgCrematogaster biroi casent0906677 l 1 high.jpg
Male (alate). Specimen code casent0906677. Photographer Michele Esposito, 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.

  • biroi. Crematogaster biroi Mayr, 1897: 428 (w.) SRI LANKA.
    • Type-material: lectotype worker (by designation of Hosoishi & Ogata, 2016a: 577), 1 paralectotype worker.
    • Type-locality: lectotype Sri Lanka (“Ceylon”): Colombo (L. Biró); paralectotype with same data.
    • Type-depository: HNHM (lectotype).
    • Bingham, 1903: 138 (q.); Imai, et al. 1984: 6 (k.).
    • Combination in C. (Orthocrema): Emery, 1922e: 131.
    • Status as species: Forel, 1903a: 682; Bingham, 1903: 138; Forel, 1906b: 89; Forel, 1912a: 70; Wheeler, W.M. 1912a: 45; Emery, 1922e: 131; Wheeler, W.M. 1927h: 87; Wheeler, W.M. 1928c: 17; Wheeler, W.M. 1929g: 44; Wheeler, W.M. 1930a: 99; Wheeler, W.M. 1930h: 66; Wheeler, W.M. 1935g: 21; Menozzi, 1939a: 300 (in key); Teranishi, 1940: 58; Chapman & Capco, 1951: 96; Wang, M., 1992: 679; Bolton, 1995b: 148; Wu, J. & Wang, 1995: 63; Tang, J., Li, et al. 1995: 65; Tiwari, 1999: 49; Mathew & Tiwari, 2000: 324; Zhou, 2001b: 74; Lin & Wu, 2003: 62; Zhou, 2006: 582; Terayama, 2009: 177; Guénard & Dunn, 2012: 42; Bharti, Guénard, et al. 2016: 35; Hosoishi & Ogata, 2016a: 577 (redescription); Rasheed, et al. 2019: 432; Dias, R.K.S. et al. 2020: 68.
    • Senior synonym of aitkenii: Hosoishi & Ogata, 2016a: 577.
    • Senior synonym of smythiesii: Hosoishi & Ogata, 2016a: 577.
    • Senior synonym of urvijae: Hosoishi & Ogata, 2016a: 577.
    • Distribution: China, India, Pakistan, Sri Lanka, Taiwan.
  • aitkenii. Crematogaster biroi var. aitkenii Forel, 1902c: 203 (w.) INDIA (Karnataka).
    • Type-material: lectotype worker (by designation of Hosoishi & Ogata, 2016a: 577), 2 paralectotype workers.
    • Type-locality: lectotype India: Kanara (E.H. Aitken); paralectotypes with same data.
    • Type-depository: MHNG.
    • Combination in C. (Orthocrema): Emery, 1922e: 132.
    • Subspecies of biroi: Forel, 1903a: 684; Bingham, 1903: 139; Forel, 1911i: 223; Wheeler, W.M. 1913e: 236; Emery, 1922e: 132; Chapman & Capco, 1951: 97; Tiwari, 1999: 49.
    • Status as species: Wu, J. & Wang, 1992: 1319; Bolton, 1995b: 147; Guénard & Dunn, 2012: 42; Bharti, Guénard, et al. 2016: 35.
    • Junior synonym of biroi: Hosoishi & Ogata, 2016a: 577.
  • smythiesii. Crematogaster biroi var. smythiesii Forel, 1902c: 203 (w.q.) INDIA (Uttarakhand).
    • Type-material: lectotype worker (by designation of Hosoishi & Ogata, 2016a: 577), 1 paralectotype worker.
    • [Note: original description includes syntype workers (number not stated), and also 6 syntype queens.]
    • Type-locality: lectotype India: Dehra Dun (Smythies); paralectotypes with same data.
    • Type-depository: MHNG.
    • Combination in C. (Orthocrema): Emery, 1922e: 132.
    • Subspecies of biroi: Forel, 1903a: 684; Bingham, 1903: 139; Emery, 1922e: 132; Menozzi, 1935a: 106; Chapman & Capco, 1951: 97; Bolton, 1995b: 162; Bharti, Guénard, et al. 2016: 35.
    • Junior synonym of biroi: Hosoishi & Ogata, 2016a: 577.
  • urvijae. Crematogaster (Crematogaster) urvijae Bharti, 2003c: 85, figs. 1-9 (w.q.) INDIA (Punjab).
    • Type-material: holotype worker, 27 paratype workers, 1 paratype queen.
    • Type-locality: holotype India: Patiala, Punjabi University Botanic Garden, 249 m., 30.20°N, 76.25°E, 21.iv.2000 (H. Bharti); paratypes with same data.
    • [Note: Hosoishi & Ogata, 2016a: 577, give altitude and date contradictory to that published: 250 m., 7.vi.1999.]
    • Type-depository: PUAC.
    • Status as species: Bharti, Guénard, et al. 2016: 37.
    • Junior synonym of biroi: Hosoishi & Ogata, 2016a: 577.

Type Material

Hosoishi and Ogata (2016) - Syntype workers, Columbo, Sri Lanka (Biró) (Hungarian Natural History Museum, examined). One syntype worker (with label of 160) in HNHM from Columbo here designated Lectotype. Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Hosoishi and Ogata (2016) - (n=10) HW 0.44–0.55; HL 0.45–0.52; CI 98–106; SL 0.33–0.39; SI 70–75; EL 0.09–0.13; PW 0.30–0.34; WL 0.49–0.58; PSL 0.09–0.12; PtL 0.16–0.19; PtW 0.13–0.17; PtH 0.12–0.15; PpL 0.10–0.13; PpW 0.14–0.17; PtHI 72–82; PtWI 78–89; PpWI 125–141; WI 100–108.

Workers monomorphic, but intermediate worker as large as queen (details below).

Head subquadratic in full-face view. Mandibles with four teeth arranged at an equal distance, apical and subapical teeth large, basal two teeth smaller. Anterior clypeal margin convex in medial portion. Compound eyes distinctly projecting beyond lateral margins of head in full-face view. Scapes reaching posterolateral corners of head.

Pronotal collar with almost straight anterior margin in dorsal view, distinctly lower than pronotum in lateral view. Pronotal dorsum with feeble ridges laterally. Mesonotal dorsum with lateral ridges that irregularly extend posteriad to tips of propodeal spines. Pronotum and mesonotum in lateral view forming slightly convex, continuous dorsal outline. Metanotal groove in dorsal view transverse, almost straight in median portion, forming deep concavity that is laterally margined by lamellate ridges. Propodeal spiracles oval, situated at posterolateral corners of propodeum, apart from metapleural gland bullae. Propodeal spines developed, longer than diameter of propodeal spiracles, in dorsal view directed posteriad.

Petiole in dorsal view with parallel sides and angulate shoulders anteriorly, longer than wide. Posterior portion of petiole with short process that is slightly higher than posterior margin of petiole disc in lateral view. Subpetiolar process strongly developed as acute process. Postpetiole in lateral view with weakly convex dorsum, as high as petiole, in dorsal view as wide as or slightly wider than petiole, weakly bilobed posteriorly but without longitudinal sulcus. Subpostpetiolar process developed as process.

Integument essentially sculptured. Dorsal surface of head generally smooth on central region, but weakly sculptured reticulately laterally. Occipital region near margin weakly sculptured. Mandibles with feeble rugulae and smooth interspaces. Clypeus generally smooth, but with two distinct pairs of longitudinal rugulae and weakly sculptured interspaces; rugulae not extending to posterior clypeal margin. Anterolateral shoulders of pronotum with rugulae. Pronotum and mesonotum with longitudinal rugulae and sculptured interspaces. Lateral surface of pronotum smooth and shining on central portion, but weakly sculptured on surrounding. Mesopleura weakly sculptured, but relatively smooth in central areas. Rugula on higher portion of mesopleura extending to small pit of mesothoracic spiracles. One pair of rugulae running from metanotal groove to tips of propodeal spines (rugulae on mesonotum extending posteriorly to propodeal spines). Dorsal surface of propodeum weakly sculptured. Dorsal and lateral surfaces of petiole sculptured. Dorsal surface of postpetiole smooth and shining. Lateral surface of postpetiole weakly sculptured.

Standing pilosity sparse. Dorsal face of head with several pairs (six to seven) of erect and stout setae, and short and appressed setae abundantly. Clypeus with two pairs of long setae in anterior portion, one directed upward and the other downward. Anterior clypeal margin with two pairs of long setae medially and some pairs (three to four) of short setae laterally. Scapes with suberect setae. Mesosoma with four pairs of long erect and stout setae (ps1PN, psaMN, pspMN, and ps1PS) that are much longer than other erect setae. Posterolateral tubercles of petiole posteriorly with one pair of stout setae. Postpetiole with one pair of stout setae on disc posteriorly. Fourth abdominal tergite with three or six pairs of erect and stout setae, and short appressed setae abundantly.

Body yellow. All flagellar segments yellow.

Intermediate (n = 1): HW 0.82; HL 0.79; CI 104; SL 0.48; SI 59; EL 0.21; PW 0.58; WL 0.98; PSL 0.18; PtL 0.35; PtW 0.28; PtH 0.25; PpL 0.21; PpW 0.32; PtHI 71; PtWI 80; PpWI 152; WI 114.

With worker character conditions, except as follows.

Head subquadratic.

Mesonotum highly convex in lateral view. Mesonotal dorsum without lateral ridges. Pronotum forming same dorsal outline with mesonotum in lateral view, but posterior face forming vertical slope to metanotal groove. Propodeal spiracles elliptical.

Subpostpetiolar area not observable in the specimen examined.

Clypeus with some longitudinal rugulae: rugulae extending to frontal region between frontal carinae.

Dorsal face of head with erect setae sparsely. Clypeus with one pair of long setae around antennal bases; directed upper. Mesosoma without distinct erect setae. Fourth abdominal tergite with short decumbent to appressed setae sparsely.

Karyotype

Explore-icon.png Explore: Show all Karyotype data or Search these data. See also a list of all data tables or learn how data is managed.
  • 2n = 24, karyotype = 24M (India) (Imai et al., 1984).

References

References based on Global Ant Biodiversity Informatics

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