Temnothorax congruus (F. SMITH, 1874 )

Radchenko, A., 2004, A Review Of The Ant Genera Leptothorax Mayr And Temnothorax Mayr (Hymenoptera, Formicidae) Of The Eastern Palaearctic, Acta Zoologica Academiae Scientiarum Hungaricae 50 (2), pp. 109-137 : 121-123

Temnothorax congruus (F. SMITH, 1874)

( Figs 26, 27 )

Leptothorax congruus F. SMITH, 1874: 406 , workers, Japan, Hyogo; WHEELER, 1906: 316, queens, males; EMERY, 1921: 253; CHAPMAN & CAPCO, 1951: 110; ONOYAMA, 1980: 197; TERAYAMA et al., 1992: 27; RADCHENKO, 1994 b: 150; BOLTON, 1995: 237; RADCHENKO, 1996: 16; KIM, 1996: 176; 2003: 2; TERAYAMA & ONOYAMA, 1999: 83; IMAI et al., 2003: 157; LYU & CHO, 2003: 271, nec COLLINGWOOD, 1976: 303 (misidentification).

Temnothorax congruus : BOLTON, 2003: 271.

Material examined: dozens of workers from Japan, Korea and Russian Far East.

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu), Russia (south of Primorsky Region), Isl. Kunashir, NE China, Korean Peninsula.

Ecology. It inhabits different kinds of forests and meadows, builds nests mainly in rotten wood, but sometimes in soil, often under stones.

Notes. T. congruus is a small blackish-brown species with short propodeal spines. It most resembles T. wui and differs from it by the shape of the petiole, whose node has a wide, slightly convex dorsal plate (in T. wui the petiolar node is very narrowly rounded, subtriangular in profile, Figs 27 and 39 ); the sculpture of

(paratype, 31). (24, 26, 28, 30) Head, dorsal view; (25, 27, 29, 31) alitrunk and waist in profile the head dorsum: frons with longitudinal rugae and coarse punctures, remaining parts punctate (in T. wui the whole head dorsum finely and densely punctate, striated only near the eyes; the central part of frons with a smooth and shiny longitudinal band, Figs 26 and 39 ). T. congruus differs from T. kurilensis (RADCHENKO) by its much shorter antennal scape, which distinctly fails to reach the occipital margin, SI 1 <0.73, SI 2 <0.90 (in the latter species the scape almost reaches or slightly surpasses the occipital margin, SI 1> 0.75, SI 2> 0.94), and by the shorter propodeal spines ( Figs 27 and 31 ).

The specimens from North Korea, determined by COLLINGWOOD (1976) as T. congruus , are in fact Vollenhovia emeryi WHEELER (material is in HNHM, examined).

Figures

Figs 24–31. Details of structure of workers of Temnothorax argentipes (syntype, 24, 25), T.congruus (syntype, 26, 27), T. eburneipes (syntype, 28, 29), T. kaszabi (paratype, 30) and T. kurilensis

Figs 32–41. Details of structure of workers of Temnothorax mongolicus (holotype, 32), T. nassonovi (33, 34),T. spinosior (syntype, 35), T. taivanensis (syntype, 36, 37) and T. wui (syntype, 38, 39), Leptothorax muscorum (40) and L. oceanicus (41) (32, 34, 35, 37, 39). Alitrunk and waist in profile;