Technomyrmex brunneus Forel, 1895

Yamane, Seiki, Leong, Chi-Man & Lin, Chung-Chi, 2018, Taiwanese species of the ant genus Technomyrmex (Formicidae: Dolichoderinae), Zootaxa 4410 (1), pp. 35-56: 39-44

publication ID

https://doi.org/10.11646/zootaxa.4410.1.2

publication LSID

lsid:zoobank.org:pub:E39EEEFA-30D3-4E8C-929E-669A0126E6EA

persistent identifier

http://treatment.plazi.org/id/FE0B8785-FFFA-2C0C-D38C-FC1A1DDFA081

treatment provided by

Plazi

scientific name

Technomyrmex brunneus Forel, 1895
status

 

Technomyrmex brunneus Forel, 1895 

( FIgS. 3–9View FIGURE 3View FIGURE 4View FIGURE 5View FIGURE 6View FIGURE 7View FIGURE 8View FIGURE9)

Technomyrmex modiglianii var. angustior Forel, 1912: 71  . Taiwan (Akau).

? Technomyrmex albipes var. brunneipes Forel  : Terayama, 1991: 80 (in list, misidentification). Technomyrmex brunneus Forel  : Bolton, 2007: 73; Terayama, 2009: 200 (in key), 239 (in list).

Worker diagnosis. MEASUREMENTS (N=10): TL 2–3, HW 0.59–0.70, HL 0.60–0.72, SL 0.58–0.70, CI 88–102, SI 91–100. WITH HEAD IN PROFILE, EYE LOCATED AT OR bEHIND MIDLENgTH OF HEAD ( FIg. 3AView FIGURE 3). MANDIbLE WITH DISTINCT LONgITUDINAL gROOVE ALONg ITS OUTER MARgIN ( FIg. 1EView FIGURE 1). DORSUM OF HEAD bEHIND LEVEL OF POSTERIOR MARgIN OF EYE WITHOUT STANDINg HAIRS. BODY ALMOST ENTIRELY bLACK, EXCEPT FOR TARSI OF LEgS YELLOWISH AND TIP OF ANTENNA bROWNISH ( FIg. 3AView FIGURE 3).

Queen description. MEASUREMENTS (N=2). TL 3.5, 3.8; HW 0.81, 0.82; HL 0.80, 0.80; SL 0.71, 0.69; EW 0.15, 0.16; EL 0.23, 0.23; CI 101, 103; SI 88, 84. VERY SIMILAR TO WORKER IN STRUCTURE, PILOSITY AND COLORATION EXCEPT FORAbout FOR MESOSOMA THAT bEARS WINgS. HEAD SLIgHTLY LONgER THAN OR ALMOST AS LONg AS bROAD. MANDIbLE WITH LONgITUDINAL gROOVE. ANTERIOR MARgIN OF CLYPEUS WITH NARROW AND SHALLOW MEDIAN EMARgINATION ( FIg. 4CView FIGURE 4). ANTERIOR OCELLUS LARgER THAN POSTERIOR OCELLI. WITH MESOSOMA IN PROFILE, MESONOTUM ANTERIORLY gENTLY SLOPINg AND POSTERIORLY FLAT; MESOPLEURON DIVIDED INTO TWO PARTS bY WEAK AND INCOMPLETE SUTURE ( FIg. 4AView FIGURE 4). PROPODEUM WITH SHORT DORSUM; SIDE OF PROPODEUM NOTAbout NOT DEMARCATED FROM METAPLEURON; DECLIVITY FLAT; SPIRACLE LOCATED ON PROPODEAL SIDE AT LEVEL OF MIDLENgTH OF DECLIVITY.

ALMOST ENTIRE SURFACE OF bODY VERY FINELY AND DENSELY PUNCTATE AND MAT; gASTER WITH MORE SUPERFICIAL PUNCTATION AND WEAKLY SHINY; MANDIbLE, PETIOLE AND COXAE OF LEgS MUCH MORE SHINY.

Winged male description. MEASUREMENTS (N=3). TL 2.5, HW 0.65–0.69, HL0.61–0.66, SL 0.20–0.24, EW 0.22–0.23, EL 0.30–0.31, CI 103–107, SI 31–35. HEAD ( FIg. 6CView FIGURE 6) SLIgHTLY bROADER THAN LONg, WITH CONVEX LATERAL MARgINS AND bROADLY ROUNDED POSTERIOR MARgIN. CLYPEUS WITH ANTERIOR MARgIN STRAIgHT TO VERY SHALLOWLY EMARgINATE, POSTERIORLY DEMARCATED FROM FRONS bY DELICATE SUTURE. EYE LARgE, WITH HEAD IN FULL-FACE VIEW ITS MAXIMUM LENgTH SUbEqUAL TO DISTANCE FROM ITS POSTERIOR MARgIN TO SUMMIT OF HEAD, DISTINCTLY bREAKINg LATERAL MARgIN OF HEAD. OCELLI MUCH LARgER THAN IN qUEEN; POSTERIOR OCELLI WIDELY SEPARATED FROM EACH OTHER. ANTENNA 13-SEgMENTED; SCAPE SHORT, ONLY SLIgHTLY LONgER THAN SEgMENTS II (PEDICEL) AND III COMbINED. PRONOTUM VERY SHORT MEDIALLY ON DORSAL FACE, bUT LATERAL FACE LARgE. MESONOTUM MASSIVE AND ROUNDLY PRODUCED DORSALLY, WITH ANTERIOR SLOPE RATHER STEEP ( FIg. 6AView FIGURE 6); MESOPLEURON DIVIDED INTO TWO PARTS bY INDISTINCT SUTURE ( FIg. 6AView FIGURE 6), DEMARCATED FROM METAPLEURON bY DEEP SUTURE; MESOSCUTELLUM SEEN IN DORSAL VIEW VERY NARROW, STRONgLY NARROWED POSTERIORLY ( FIg. 6BView FIGURE 6). METANOTUM VERY SHORT (jUST A MERE bAND); METAPLEURON NOT DEMARCATED FROM LATERAL FACE OF PROPODEUM; METAPLEURAL gLAND ORIFICE LARgE. PETIOLE HIDDEN bENEATH gASTER. GENITALIA VERY LARgE, EXPOSED, OCCUPYINg MORE THAN 1/3 OF ENTIRE gASTER.

STANDINg PILOSITY VERY POOR, SEEN ONLY IN ANTERIOR PORTION OF HEAD AROUND MOUTHPARTS INCLUDINg ANTERIOR MARgIN OF CLYPEUS, ON gASTRAL VENTER AND AROUND TIP OF gASTER; FRONTAL CARINA LACKINg ANY STANDINg HAIRS; ALL HAIRS ON VENTRAL SURFACES OF MESOSOMA AND gASTER APPRESSED. BODY ALMOST ENTIRELY bLACK; MANDIbLE, MAXILLARY AND LAbIAL PALPI, ANTENNAL SEgMENT II YELLOWISH; TARSI OF ALL LEgS WHITISH.

IN WINg VENATION, THE qUEEN AND WINgED MALE ARE VERY SIMILAR TO EACH OTHER ( FIgS. 5View FIGURE 5, 7View FIGURE 7).

Wingless male description. MEASUREMENTS (N=3). TL 2.5, HW 0.61–0.65, HL 0.59–0.63, SL 0.22–0.24, EW 0.17–0.18, EL 0.23, CI 103–105, SI 35–38. IN gENERAL HAbITUS SIMILAR TO WORKER, bUT EASILY SEPARAbLE FROM THE LATTER bY THE PRESENCE OF OCELLI ( NOTE THAT INTERCASTE FEMALES OFTEN WITH OCELLI) AND EXPOSED gENITALIA. HEAD SIMILAR TO THAT OF WINgED MALE. PRONOTUM LONgER AND MESONOTUM LESS MASSIVE THAN IN WINgED MALE. WITH MESOSOMA IN PROFILE, MESONOTUM STRONgLY AND ROUNDLY CONVEX DORSALLY; MESOPLEURON NOTAbout NOT DIVIDED INTO UPPER AND LOWER PORTIONS; MESOSCUTELLUM NOTAbout NOT DIFFERENTIATED. METANOTAL gROOVE DISTINCT, WITHOUT FLAT DORSUM OF METANOTUM; METAPLEURON NOTAbout NOT DEMARCATED FROM PROPODEAL SIDE. GENITALIA EXPOSED bUT MUCH SMALLER THAN IN WINgED MALE.

STANDINg PILOSITY POOR, CONFINED TO ANTERIOR MARgIN OF CLYPEUS, MANDIbLE, VENTER AND TIP OF gASTER AND COXAE OF ALL LEgS. ALMOST ENTIRE bODY DARK REDDISH bROWN; ANTENNA LIgHTER WITH SEgMENT II (PEDICEL) YELLOWISH; MANDIbLE YELLOWISH; TARSI OF ALL LEgS WHITISH.

Comparison of genitalia between winged and wingless males. WINgED MALES HAVE SIgNIFICANTLY LARgER gENITALIA THAN WINgLESS MALES: FORAbout FOR INSTANCE, CAPSULE APPROXIMATELY 3.4 TIMES, PENISVALVA 1.6 TIMES, AND VOLSELLA 1.6 TIMES AS LONg AS THOSE IN THE LATTER ( FIg. 9View FIGURE9). MOREOVER, WINgED AND WINgLESS MALES HAVE DISTINCTLY DIFFERENT MORPHOLOgIES IN gENITAL CAPSULE, AbDOMINAL STERNUM IX, AND VOLSELLA  . THE TELOMERE ( FIg. 9BView FIGURE9) IS IN LATERAL VIEW ELONgATE WITH SUbPARALLEL UPPER AND LOWER MARgINS AND ROUND APEX IN WINgED MALES (bUT THICKER WITH CONVEX LOWER MARgIN AND ACUTE APEX IN WINgLESS MALES). THE STERNUM IX ( FIg. 9DView FIGURE9) IN DORSAL VIEW HAS WELL-DEVELOPED POSTEROLATERAL CORNERS AND A DEEP MEDIAN NOTCH IN THE FORMER (WITH WEAKER POSTEROLATERAL CORNERS AND A SHALLOWER MEDIAN NOTCH IN THE LATTER). THE VALVURA ( FIg. 9EView FIGURE9) IS THICKER IN THE FORMER THAN IN THE LATTER. THE VENTRAL MARgIN OF THE VOLSELLA ( FIg. 9FView FIGURE9) bEARS A WELL-DEVELOPED HOOK IN THE FORMER (bUT THE HOOK SMALLER AND EqUIPPED WITH A SERIES OF SMALL TEETH IN THE LATTER). THUS, THE STRUCTURE OF gENITAL SCLERITES SHOWS REMARKAbLE DIFFERENCES bETWEEN WINgED AND WINgLESS MALES (SEE ALSO OgATA et al., 1996).

Distribution. TROPICAL TO WARMAbout WARM TEMPERATE ASIA FROM SRIAbout SRI LANKA THROUgH INDIA AND CHINA TO JAPAN ( BOLTON, 2007; JAPANESE ANTAbout ANT DATAbASE, 2003; SHIMANA AND YAMANE, 2009). IT WAS RECENTLY FOUND IN NEWAbout NEW GUINEA TO bE A DOMINANT ANTAbout ANT IN A LOWLAND SECONDARY FOREST (KLIMES et al., 2015).

Specimens examined ( NMNSAbout NMNS, SKYC, TFRIAbout TFRI)  . NANTOU COUNTY: 2 WORKERS  , SHEN MU, 23.5221˚N, 120.8399˚E, 11.II.2012, S. H. LIN LEg. (OTFA19); 18 WORKERS, HUISUN EXP. FOREST (500–800 M ALT.), 24.0896°N, 121.0305°E, 27–30.IV.2017, C. M. LEONg LEg.; 1 WORKER, JIHYUETAN (SUN MOON LAKE), 1.III.1988, S. AOKI LEg. TAINAN COUNTY: 1 WORKER  , HSIA TOU TSAI, 23.0716°N, 120.5190°E, 10.VII.2011, S.H. LIN LEg. TAIPEI COUNTY: 1 WORKER, FU JHOU SHAN  , 25.0177°N, 121.5524°E 30.IX.2016, C.M. LEONg LEg. (CWFA04); 10 WORKERS, 10 WINgED MALES, 10 WINgLESS MALES, 10 ALATE & 10 DEALATE qUEENS FROM A COLONY, FU JHOU SHAN, 25.0177°N, 121.5524°E, 21.X.2017, C.M. LEONg LEg. (CML20170521-COL.-1); 12 WORKERS, TAMSUI, 26.III.2012, T. YAMASAKI LEg.; 6 WORKERS, WULAI (NEAR FIELD STATION), 20.IV.2010, NEST IN DEAD STEM, SK. YAMANE LEg. (TW10-SKY-02); 11 WORKERS, WULAI, 20.IV.2010, LOWER VEgETATION, SK. YAMANE LEg.; 4 WORKERS, FUSHAN (600–650 M ALT.), 22–23.IX.1997, SK. YAMANE LEg.; 3 WORKERS, WA CHIH SHIN, 24.0934°N, 121.0311°E, 5.X.2012, S. H. LIN LEg. (OTFA21). YUNLIN COUNTY: 2 WORKERS, PINg TINg, 10.VII.2010, S. H  . LIN LEg. (OTFA03 & 04).

Remarks. THIS TRAMP SPECIES IS VERY COMMON AND WIDELY DISTRIbUTED IN TAIWAN. HOWEVER, bIOLOgICAL INFORMATION IS STILL LIMITED. A COLONY WAS FOUND IN A DEAD STEM OF A TREE IN WULAI. ONE OF US ( CMLAbout CML) LOCATED ANOTHER COLONY IN DRY DECAYED WOOD IN FU JHOU SHAN, FROM WHICH NUMEROUS WORKERS, WINgED AND WINgLESS MALES, AND WINgED qUEENS WERE COLLECTED ( FORAbout FOR INTERCASTES AND WINgLESS SEXUALS, SEE TSUjI et al., 1991, YAMAUCHI et al., 1991, AND OgATA et al., 1996).

FOR

Forssa Museum of Natural History

NOT

Nottingham City Natural History Museum

WARM

University of Central Missouri

SRI

Serengetti Research Institute

ANT

Anguilla National Trust

NEW

University of Newcastle

NMNS

National Museum of Natural Science

TFRI

Taiwan Fisheries Research Institute

CML

Colecao Micologica de Lavras

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Technomyrmex

Loc

Technomyrmex brunneus Forel, 1895

Yamane, Seiki, Leong, Chi-Man & Lin, Chung-Chi 2018
2018
Loc

Technomyrmex modiglianii var. angustior

Forel, 1912 : 71
Loc

Technomyrmex albipes var. brunneipes

Terayama, 1991 : 80
Bolton, 2007 : 73
Terayama, 2009 : 200