Formica yoshiokae

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Formica yoshiokae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Formicini
Genus: Formica
Species: F. yoshiokae
Binomial name
Formica yoshiokae
Wheeler, W.M., 1933

Formica yoshiokae antweb1008426 p 1 high.jpg

Formica yoshiokae antweb1008426 d 1 high.jpg


This ant may have to be regarded as a subspecies of Formica picea. It differs, however, from the typical form, the subspecies orientalis and its five varieties in details of coloration and sculpture and from most of them in the shape of the epinotum and petiole. (Wheeler 1933)


Distribution based on Regional Taxon Lists

Palaearctic Region: Japan (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




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

  • yoshiokae. Formica yoshiokae Wheeler, W.M. 1933c: 66 (w.) JAPAN.

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



Length 4-6 mm.

Closely related to Formica picea. Jet black; palpi, mandibles, antennre, tarsi and articulations of legs deep piceous brown. Surface of the body, and especially of the gaster, even smoother and more shining than in picea; mandibles subopaque, densely and rather coarsely punctate-striate; clypeus and cheeks with very sparse, elongate, piligerous punctures. Head broader than in picea, epinotum of the same shape, in profile with straight and nearly horizontal base, forming a distinct obtuse angle with the declivity, which is straight, sloping and of the same length. Petiole with the superior border more compressed, more acute and distinctly notched in the middle. Hairs white, rather short, very sparse on the upper surface of the head and thorax and on the petiolar border; more numerous on the gaster, absent on the legs, which have only the usual row of bristles on the flexor surface of the tibiae. Pubescence pale, distinct, but short and very dilute on the head, denser on the mesosterna and legs, lacking on the gaster.

Type Material

Described from ten specimens taken by Mr. H. Yoshioka at an altitude of 1400 meters on Mt. Okagi, near Kiryu, Japan, July 26, 1932.


  • Wheeler, W. M. 1933c. New ants from China and Japan. Psyche (Camb.) 40: 65-67 (page 66, worker described)