Orasema dubitata, Baker & Heraty, 2020

Baker, Austin J. & Heraty, John M., 2020, The New World ant parasitoid genus Orasema (Hymenoptera: Eucharitidae), Zootaxa 4888 (1), pp. 1-84 : 29-32

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Orasema dubitata

n. sp.

Orasema dubitata n. sp.


( Fig. 14 View FIGURE 14 )

Diagnosis. Distinguished from other members of the bakeri group by the following combination of characters: mesoscutal midlobe and lateral lobes reticulate without any depressions ( Fig. 14F View FIGURE 14 ), petiole relatively long (PTL:PTW = 1.0– 1.4 in females, 2.8–4.6 in males), and male antenna with setae long and broadly curved anteriorly ( Fig. 14E View FIGURE 14 ).

This species is difficult to diagnose from O. bakeri but body color is generally more blue-purple (as opposed to blue-green in O. bakeri ) and has a smaller average body size.

Description. Female. Length 2.2–3.2 mm ( Fig. 14A View FIGURE 14 ). Color. Head and mesosoma iridescent blue-purple. Scape, pedicle, and anellus pale brown. Maxilla and labium pale brown. Tibiae yellow. Fore wing venation clear to light brown. Head ( Fig. 14B View FIGURE 14 ). Head in frontal view subtriangular; HW:HH = 1.1–1.3; scrobal depression deep, laterally rounded, reticulate; eyes bare; IOD:EH = 1.6–1.9; MS:EH = 0.7–1.0; supraclypeal area as long as broad, equal to length of clypeus, smooth to weakly reticulate; epistomal sulcus distinct; anteclypeus distinct, nearly straight. Palpal formula 3:2. Occiput with dorsal margin evenly rounded. Pedicel globose, broader than F1. FL:HH = 0.9–1.2; F2L: F2W = 1.0–1.7, F2L:F3L = 1.0–1.7 ( Fig. 14D View FIGURE 14 ). Mesosoma ( Fig. 14C, F View FIGURE 14 ). ML:MH = 1.2–1.4. Mesoscutal midlobe sparsely setose; lateral lobe reticulate; notauli deep. Axilla reticulate, dorsally rounded, on roughly same plane as mesoscutellum; scutoscutellar sulcus narrow, irregularly foveate, narrowly separated from transscutal articulation; mesoscutellar disc slightly longer than broad, reticulate; frenal line irregularly foveate; axillular sulcus indicated by a strong longitudinal carina; axillula reticulate. Propodeal disc broadly rounded, without depression or carina ( Fig. 14G View FIGURE 14 ); callus reticulate, bare; callar nib absent. Propleuron convex. Postpectal carina weak. Upper mesepimeron reticulate to smooth; lower mesepimeron reticulate; transepimeral sulcus distinct. Metepisternum laterally reticulate. HCL:HCW = 1.4–1.9, reticulate; HFL:HFW = 4.8–5.9, sparsely setose. FWL:FWW = 2.3–2.6, FWL:ML = 1.8–2.3; fore wing with basal area and speculum bare, costal cell and wing disc sparsely setose; marginal fringe minute to absent; submarginal vein bare; marginal vein with sparse minute setae; stigmal vein about twice as long as broad, perpendicular to anterior wing margin; postmarginal vein longer than stigmal vein. Metasoma. Petiole broad, linear in profile, PTL:PTW = 1.0–1.4, PTL:HCL = 0.6–0.9, reticulate, lateral margin rounded, ventral sulcus present with margins narrowly separated. Ovipositor with subapical carina present; second (dorsal) valvula with 6 or 7 annuli that are narrowly separated dorsally, the carinae coalescing.

Male. Length 1.7–2.8 mm. HW:HH = 1.1–1.3; FL:HH = 1.1–1.5, F2L:F2W = 1.1–1.8 ( Fig. 14E View FIGURE 14 ). Tibiae yellow. PTL:PTW = 2.8–4.6, PTL:HCL = 1.2–1.8.

Hosts. Taken from the nest of Pheidole californica Mayr in California.

Plant associates. Oviposits on the underside of the leaves of Desmodium sp. ( Fabaceae ) in Florida. Swept from Chamaecrista fasciculata (Michx.) Greene ( Fabaceae ) in Florida and Chilopsis linearis (Cav.) Sweet ( Bignoniaceae ) in New Mexico.

Distribution ( Fig. 11 View FIGURE 11 ). Mexico: VE; United States: AZ, CA, FL, KS, NM, TX. Collected March–November.

Material Examined. Holotype. UNITED STATES.Florida: Highlands Co., Archbold Biol.Sta.Lk.Placid, Trail

1 SSo , 27 ° 10’54”N, 81 ° 21’6”W, 25.vii.1986, M.Deyrup, Malaise Trap [♀, deposited in USNM:UCRCENT00471759]. Paratypes: MEXICO. Veracruz: 28 km SE Jalapa, 19 ° 24’39”N, 96° 40’31”W, 7.vii.1984, G. Gordh [1³ UCRC: UCRCENT00435191]. UNITED STATES. Arizona: Cochise Co., 6.8 mi. SE Apache Tr. mouth Skeleton Cyn., 1371m, 31 ° 35’39”N, 109 ° 04’8”W, 14.viii.1982, G.Gibson [1³ 2♀, CNC: UCRCENT00415343–45]. Skeleton Can-yon, 8 mi. E Apache., 31°35’39”N, 109°04’8”W, 2.ix.1991, E.E. Grissell, creekside vegetation, sweep [1³, USNM: UCRCENT00247964]. Box Canyon Road, 1203m, 31°46’56”N, 110°51’2”W, 26.vii.2009, J. Mottern, dry wash, sweep, M09-018 [1♀, UCRC: UCRCENT00352479]. IBP. Sta, Rita Destr. Site, 917m, 31 ° 51’3”N, 110 ° 58’58”W, 12.viii.1970, CEPA, D. Vac [1³, UAZ: UCRCENT00403886]. Pima Co., Santa Rita Mtns., Box Cyn., 1700m, 31 ° 47’54”N, 110 ° 46’37”W, 3.viii.1996, M.W Gates, G96/045 [1³, UCRC: UCRCENT00414167]. Pinal Co., Oracle, 1371m, 32 ° 36’39”N, 110 ° 46’14”W, 25.viii.1934, Ian Moore [1³, SDNH: UCRCENT00242772]. California: Pinon Flat, San Jacinto Mts., 33 ° 34’48”N, 116 ° 27’36”W, 27.v.1939, J.G. Shanafelt [1♀, LACM: UCRCENT00305136]. Las-sen Co., Hallelujah Jct, 39 ° 46’30”N, 120 ° 02’19”W, 13.vii.1972, R.M. Bohart [2♀, UCDC: UCRCENT00416118–19]. Hallelujah Junction, 1440m, 39°47’0”N, 120°04’0”W, 30.vi.2006, P.S. Ward, ex Pheidole californica nest, 15622 [2♀, UCDC: UCRCENT00352480–81]. Florida: Alachua Co., 5.5 mi West Gainesville, 29°36’57”N, 82°24’22”W, L.R Davis Jr [1♀, UCRC:UCRCENT00311927]. 5.5 Mi. W.Gainesville, T10S R19E Section 4, Castlegate Mobile Home Park, 29 ° 39’14”N, 82 ° 24’7”W, 21.viii.1985, Lloyd R. Davis. Jr., on Cassia fasciculata [1³, FSCA: UCRCENT00322556]. Gainesville, 29 ° 39’6”N, 82 ° 19’29”W, 4.v.1937, L.J. Bottimer [1³, USNM: UCRCENT00416654]. Highlands Co., Archbold Biol. Sta., middle gate, 60m, 27°09’5”N, 81°21’16”W, 15.vii.2011, J.Heraty, oak scrub, swp, H11-095 [1³, UCRC: UCRCENT00292549]. Archbold Biol. Sta. Lk. Placid, Trail 1 SSo, 27 ° 10’54”N, 81 ° 21’6”W, 11.vi.1986, M. Deyrup, Malaise Trap [1♀, ABS: UCRCENT00421641]; 12.iii.1986 [1♀, ABS: UCRCENT00421654]; 14.viii.1986 [1³ 1♀,ABS: UCRCENT00421652–53]; 16.iii.1983 [2³, ABS: UCRCENT00421635–36]; 18.iv.1986 [1³ 1♀, ABS: UCRCENT00421642–43]; 19.v.1986 [1♀,ABS:UCRCENT00421638]; 21.iii.1986 [1³,ABS: UCRCENT00421649]; 21.xi.1986 [1³, ABS: UCRCENT00421648]; 19.iii.1986 [1♀, ABS: UCRCENT00305344]; 14.v.1986 [1³ 1♀, ABS: UCRCENT00305372, UCRCENT00421632]; 21.iv.1986 [4³ 1♀,ABS: UCRCENT00305331, UCRCENT00305367– 70]; 22.vii.1985 [1♀, ABS: UCRCENT00305366]; 26.v.1986 [2³ 2♀, ABS: UCRCENT00421624–26, UCRCENT00421629]; 28.iv.1986 [2³, ABS: UCRCENT00305336, UCRCENT00421650]; 3.vi.1985 [1³, ABS: UCRCENT00421657]; 30.v.1986 [2♀, ABS: UCRCENT00305326, UCRCENT00421659]; 30.vi.1986 [1♀, ABS: UCRCENT00421620]; 4.vi.1986 [1♀,ABS:UCRCENT00421631]; 7.iv.1986 [3³ 2♀,ABS:UCRCENT00305339–43]; 9.vi.1986 [2♀,ABS: UCRCENT00421627–28]; 23.vi.1986 [1³, ABS: UCRCENT00421622]; Trail 2 SSo, 20.iv.1986 [1³ 1♀,ABS: UCRCENT00421646–47]; 23.iv.1986 [1³ 1♀,ABS: UCRCENT00421639–40]; 24.iii.1986 [1³, ABS: UCRCENT00421656]; 28.iii.1986 [1³, ABS: UCRCENT00421655]; 7.iv.1986 [1³, ABS: UCRCENT00421645]. 11.viii.1984 [1³, UCDC: UCRCENT00477673]; 12.v.1986 [1♀, ABS: UCRCENT00305346]; 16.vi.1986 [2³, ABS: UCRCENT00305337–38]; 19.v.1986 [1³, ABS: UCRCENT00305335]; 26.v.1986 [1♀,ABS: UCRCENT00305345]; 28.v.1986 [1♀, ABS: UCRCENT00421633]; 30.vi.1986 [1♀, ABS: UCRCENT00421619]; 31.iii.1986 [2³ 1♀, ABS: UCRCENT0030533–34]; 7.v.1986 [1³,ABS:UCRCENT00305371]; 10.iv.1986 [1³ 1♀,ABS:UCRCENT00305327– 28]; 7.vii.1986 [1♀, FSCA: UCRCENT00411879]; 25.iv.1986 [2³ 2♀, ABS: UCRCENT00305358–61]; 30.iv.1986 [2³ 2♀, ABS: UCRCENT00305362–65]; 4.iv.1986 [4³ 2♀, ABS: UCRCENT00305347–48, UCRCENT00305350– 53]; 9.iv.1986 [2³ 1♀, ABS: UCRCENT00305354, UCRCENT00305356–57]. Archbold Biol. Sta.; middle gate, 60m, 27°09’5”N, 81°21’16”W, 15.vii.2011, J. Mottern, southern ridge sandhill, sweep, M11-021 [1♀, UCRC: UCRCENT00292550]. Archbold Biol. Sta., 27 ° 10’54”N, 81 ° 21’06”W, 26.iv–1.v.1968, D. Wahl, MT [1♀ UCRC: UCRCENT00436388]. Marion Co., 9mi SSW Ocala (KCE), 20-30m, 29 ° 03’55”N, 82 ° 11’36”W, 4-10.ix.1975, J.Wiley, malaise trap [1♀, UCRC: UCRCENT00311928]. Orange Co., Wekiwa Springs State Park, Burn Zone 43/31, 28°44’32”N, 81°30’33”W, 13.v.2001, P.J. Russell and S.M. Fullerton, Longleaf Pine—Turkey Oak, Malaise Trap [1³, UCFC: UCFC00105176]; 18.viii.2001 [1♀, UCFC: UCFC00113078]; 23.vi.2001 [1³, UCFC: UCFC00106282]; 26.v.2001 [1♀, UCFC: UCFC00105910]; 7.vii.2001 [1♀, UCFC: UCFC00107110]. Polk Co., Tiger Ck. Preserve Bab-son Pk.; NE of Pfundstein Rd, 27°48’36”N, 81°29’1”W, 23.v.2007, B. Pace-Aidana, A. Peterson, Sandhill/ Xeric Oak Hammock, Malaise [1³, EMEC: UCRCENT00236101]; 5.v.2007 [1³, EMEC: UCRCENT00236099]. Putnam Co., 2mi W Interlachen, 29°38’14”N, 82°00’17”W, 30.v.1991, G. Zolnerwich [1³, UCRC: UCRCENT00436362]. Idaho: Owyhee Co., Murphy, 43 ° 12’54”N, 116° 33’04”W, 21.vi.1977, D.M. Kirkbride [1³, WFBM: UCRCENT00403630]. Kansas: Clark Co., Sitka, 37 ° 10’30”N, 99 ° 39’5”W, 12.vi.1960, W.T. Van Velzen [1♀, MEM: UCRCENT00242498]. New Mexico: Dona Ana Co., nr. Whitesands, 1539m, 32°24’47”N, 106°32’52”W, 25.vi.2014, A. Baker & S. Heacox, sweep Chilopsis, AB 14.025 [1³, UCRC: UCRCENT00436482]. 14.9 km W Animas, 1326m, 31 ° 56’13”N, 108 ° 57’10”W, 26-30.vii.1982, G. Gibson [1³, CNC: UCRCENT00415374]. 9.3 mi W Animas, 1308m, 31°56’14”N, 108°56’45”W, 26-30.vii.1982, G Gibson [3³, CNC: UCRCENT00415376–78]. Hidalgo Co., Grat Ranch, Whitewater Mtns, nr border obelisk #61, 31°20’22”N, 108°35’59”W, 5.viii.2002, Gates/George [1³, UCRC:UCRCENT00414036]. Gray Ranch, Animas Mtns., Culberson Camp, 31°23’08”N, 108°37’53”W, 2.viii.2002, M. Gates [1³ UCRC: UCRCENT00408496]. Texas: Brewster Co., Big Band Nat’l Pk, Glenspring Pond in 0.5 mi., 914m, 29 ° 12’60”N, 103 ° 15’59”W, 9.vii.1982, G. Gibson [1³, CNC: UCRCENT00415392]. Erath Co., 5 mi. north Stephenville, 397m, 32 ° 17’40”N, 98 ° 11’23”W, 1-6.vi.1980, P. T. Riherd, ex Malaise trap [2³ 2♀, TAMU: UCRCENT00243111, UCRCENT00426202–04]; 27-30.v.1980 [1³, TAMU: UCRCENT00243112, UCRCENT00426511]. Presidio Co., Big Bend Ranch, 1.6 km NE McGuirks Tanks, 1318m, 2928’56”N, 10348’14”W, 19.vi.1990, J.B Woolley, 90/020 [1³, UCRC: UCRCENT00312086]. GenBank sequences. UCRCENT00292550 (D3153): 18S ( MH231641 View Materials ), 28S D2 ( MH247293 View Materials ), 28S D3–5 ( MH247458 View Materials ), COI-NJ ( MH247668 View Materials ); UCRCENT00352479 (D3720): 18S (KR632485.1), 28S D2 (KR632424.1), 28S D3–5 (KR632463.1), COI-BC (KR733142.1), COI-NJ (KR733178.1).


Etymology. From Latin dubi meaning “doubtful” in reference to the difficulty distinguishing this species from O. bakeri and the mistaken identifications in Baker et al. (2020).