Strumigenys juliae Forel, 1905

Tang, Kit Lam & Guénard, Benoit, 2023, Further additions to the knowledge of Strumigenys (Formicidae: Myrmicinae) within South East Asia, with the descriptions of 20 new species, European Journal of Taxonomy 907, pp. 1-144 : 78-79

Strumigenys juliae Forel, 1905

Fig. 23G–I ; Table 2

Strumigenys juliae Forel, 1905: 12 (w.) INDONESIA (Java). Indomalaya.

Material examined

THAILAND – Trang Province • 4 workers; Khao Chong ; 7.54401° N, 99.80087° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 2 workers, 1 queen; same collection data as for preceding; IBBL • 1 worker; same collection data as for preceding; IBBL • 1 worker; same collection data as for preceding; IBBL • 1 worker; Khao Chong ; 7.54309° N, 99.80029° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 2 workers, 1 queen; Khao Chong ; 7.54251° N, 99.79813° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 8 workers, 1 queen; Khao Chong ; 7.54246° N, 99.79651° E; 25 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 1 worker; same collection data as for preceding; IBBL • 1 worker; Khao Chong ; 7.54204° N, 99.79298° E; 26 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 10 workers, 1 queen; Khao Chong ; 7.54525° N, 99.79203° E; 26 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 16 workers, 2 queens; same collection data as for preceding; IBBL • 11 workers; Khao Chong ; 7.54765° N, 99.78864° E; 26 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 6 workers; Khao Chong ; 7.5436° N, 99.8067° E; 27 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 1 worker; Khao Chong ; 7.54395° N, 99.80502° E; 27 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 14 workers, 1 queen; Khao Chong ; 7.26917° N, 99.66152° E; 28 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 1 worker; Khao Chong ; 7.25423° N, 99.71394° E; 29 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 6 workers; Khao Chong ; 7.25533° N, 99.71729° E; 29 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 3 workers; Khao Chong ; 7.54381° N, 99.79488° E; 30 Dec. 2018; IBBL members leg.; Winkler, 4 corners; IBBL • 27 workers, 1 queen; Khao Chong ; 7.55521° N, 99.79266° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL • 1 worker; Khao Chong ; 7.55519° N, 99.79115° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL • 9 workers, 1 queen; same collection data as for preceding; IBBL • 9 workers, 1 queen; Khao Chong ; 7.55602° N, 99.78968° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL • 7 workers; Khao Chong ; 7.55471° N, 99.78834° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL • 4 workers, 3 queens; Khao Chong ; 7.55487° N, 99.7865° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL • 3 workers, 2 queens; Khao Chong ; 7.55606° N, 99.78436° E; 1 Jan. 2019; IBBL members leg.; Winkler, 4 corners; IBBL .

VIETNAM – Đắk Nông Province • 4 workers; Nam Nung Reserve ; 12.2045° N, 107.75543° E; 883 m a.s.l.; 9 Jun. 2018; IBBL members leg.; Winkler; IBBL • 1 worker; Nam Nung Reserve ; 12.18455° N, 107.76223° E; 878 m a.s.l.; 9 Jun. 2018; IBBL members leg.; Winkler; IBBL • 25 workers, 4 queens; Nam Nung Reserve ; 12.1757° N, 107.76062° E; 907 m a.s.l.; 10 Jun. 2018; IBBL members leg.; Winkler; IBBL • 1 worker; Nam Nung Reserve ; 12.1666° N, 107.76752° E; 893 m a.s.l.; 10 Jun. 2018; IBBL members leg.; Winkler; IBBL • 1 worker; Nam Nung Reserve ; 12.16745° N, 107.76682° E; 890 m a.s.l.; 10 Jun. 2018; IBBL members leg.; Winkler; IBBL • 11 worker, 1 queen; Nam Nung Reserve ; 12.23025° N, 107.83087° E; 886 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 4 workers; Nam Nung Reserve ; 12.23077° N, 107.83045° E; 911 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 1 worker; Nam Nung Reserve ; 12.23077° N, 107.83063° E; 909 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 3 workers, 1 queen; Nam Nung Reserve ; 12.23104° N, 107.83173° E; 891 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 2 workers; Nam Nung Reserve ; 12.23113° N, 107.83153° E; 907 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 17 workers; same collection data as for preceding; IBBL • 1 worker; Nam Nung Reserve ; 12.23036° N, 107.83293° E; 826 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL • 1 worker, 2 queens; Nam Nung Reserve ; 12.22927° N, 107.83662° E; 805 m a.s.l.; 12 Jun. 2018; IBBL members leg.; Winkler; IBBL .

Measurements

Workers

TL 1.9–2.4, HL 0.50–0.60, HW 0.35–0.44, MandL 0.22–0.28, SL 0.28–0.36, EL 0.043 –0.066, PW 0.20– 0.27, ML 0.47–0.63, PL 0.22–0.29, PH 0.10–0.12, DPW 0.09–0.13, PPL 0.12–0.17, GL 0.38–0.53, CI 68–75, MI 42–46, SI 74–86, OI 11–16, LPI 41–50, DPI 39–56 (n= 14).

Geographic range

Borneo, Indonesia (Java and Lesser Sunda Islands), Malaysia (Peninsular), Philippines, Singapore, Thailand (Trang), Vietnam (Đắk Nông).

New record for Thailand and Vietnam.

Ecology

Collected in primary forest, secondary forest, mature forest and rubber plantation.

Comments

The new records in Thailand and Vietnam extend the species’ geographical range more than 1000 km northward into the Indochinese Peninsula, and indicate that it may also be present in the nearby country of Cambodia.

Figures

Fig. 23. New species records of Strumigenys Smith, 1860 in full-face, profile and dorsal views. A–C. Worker of S. inhonesta Bolton, 2000 from Thailand (ANTWEB1011945). D–F. Worker of S. jacobsoni Menozzi, 1939 from Vietnam (ANTWEB1011973). G–I. Worker of S. juliae Forel, 1905 from Thailand (KCW-S08-sp03).