Calosota elongata, Gary A. P., Gibson, 2010

Gary A. P., Gibson, 2010, Calosota Curtis (Hymenoptera, Chalcidoidea, Eupelmidae) - review of the New World and European fauna including revision of species from the West Indies and Central and North America, ZooKeys 55, pp. 1-75 : 26-29

Calosota elongata sp. n. Figs 517364470, 71

Etymology.

From the Latin word elongatus, ‘prolonged’, in reference both to the elongate-slender flagellum and syntergum of females.

Type material.

HOLOTYPE♀ (UCDC). USA AZ Pima Co., Santa Rita Mtns., Coronado Natl. For., S of Box Cyn Rd nr jct. with Forest Service Road 231; 31°47.9'N; 110°45.6'W, T12S, R15E, N1/2 of section 12, coll. 2.V.2.2009, em. 6-7.VII.2009, TW Coleman, A Cippilone; ex. Quercus emoryi , bark & phloem in trunk, associated with Agrilus coxalis (goldspotted oak borer); CNC Photo 2009-25; Holotype Calosota elongata Gibson. ALLOTYPE♂ (UCDC). [USA] AZ: Pima Co., Santa Rita Mountains, Coronado Nat. Forest, S. of Box Cyn Rd, near X with FS [Forest Service] Road 231, 31.79961°N; 110.75921°W, V.2.2009, coll. T.W. Coleman, A. Cippilone; ex. bark and phloem of main stem of Emory oak, Quercus emoryi associated with the goldspotted oak borer, Agrilus coxalis Waterhouse ( Coleoptera : Buprestidae ), T19S, R15E, N 1/2 of Sec. 12; CNC Photo 2009-49; Allotype Calosota elongata Gibson.

Additional paratypes. USA. Arizona: Cochise Co., Chiricahua National Monument, nr horse trailer parking lot, 32.00816°N; 109.3736°W, 10.III.10, T.W. Coleman, ex. bark and phloem of main stem of Emory bark, Quercus emoryi , associated with goldspotted oak borer, Agrilus coxalis Waterhouse ( Coleoptera : Buprestidae ) (1♀ CNC; 1♀ UCRC; 2♀, 1♂ USNM). Pima Co., same data as holotype (5♀ UCDC, CNC Photo 2009-24, CNC SEM 2009-49); same data as holotype except em. 12-14.VII.09 (4♀, 1♂ CNC, CNC SEM 2009-50); same data as allotype (1♀ UCDC).

Description.

FEMALE (Figs 17, 36). HOLOTYPE: length 6.5 mm. Color. Head (Fig. 5) primarily dark bluish-green, including spot below anterior ocellus, but with transverse coppery band on vertex between inner orbits and more or less M-like coppery region on upper face, the lateral arm of region extending dorsally contiguous with anterior ocellus to posterior ocellus and ventrally almost touching inner orbit; lower face broadly dark along oral margin, including clypeal region; posterior surface of head dark or greenish under some angles of light except more distinctly bluish-purple in ∩-shaped band along outer orbit and occiput. Maxillary and labial palpi dark. Antenna dark brown except scape with slight greenish luster under some angles of light. Tegula yellowish-brown. Mesoscutum (Fig. 17) with inclined, convex part of lateral lobe bluish-purple except margin above prepectus darker or somewhat greenish under some angles of light, and dorsally with slender greenish band medially over about anterior half, but otherwise dark dorsally with yellowish or reddish-coppery lusters under some angles of light, the dark region posteriorly about as wide as base of scutellum and widening anteriorly to include parapsidal lines; scutellar-axillar complex with axillae and frenal area bluish purple, but most of scutellum similar in color to mesoscutum medially. Acropleuron bluish-purple to more greenish or coppery under some angles of light, particularly microsculptured region. Legs (Fig. 36) extensively brown with knees, tibiae apically, and tarsi mostly yellowish, the mesotibia somewhat more extensively yellowish. Fore wing hyaline; setae uniformly brown. Gaster (Figs 17, 36) mostly dark brown but dorsally with slight coppery sheen under some angles of light and first gastral tergum distinctly bluish-purple laterally.

Structure/setation. Head in dorsal view about 2 × as wide as long, with IOD about 0.4 × head width; IOD: MPOD: OOL: POL: LOL = 62: 15: 10: 18: 10; in frontal view about 1.16 × as wide as high, with dorsal margin of torulus distinctly below level of lower orbits; malar space about 0.65 × eye height. Head (Figs 5, 70) with frontovertex and parascrobal region meshlike reticulate to about level of dorsal limit of interantennal region, medially the reticulations tapered ventrally between dorsal limits of smooth and shiny scrobes and laterally parascrobal region more transversely reticulate-rugulose; interantennal region finely meshlike coriaceous and clypeal region microcoriaceous; parascrobal region obliquely coriaceous-alutaceous below rugulose region and paraclypeal region meshlike to obliquely reticulate. Head with brownish setae on frontovertex and more conspicuous white setae on parascrobal region, interantennal region and lower face. Antenna (Fig. 36) with flagellum conspicuously elongate-slender; length of flagellum + pedicel almost 2.3 × head width; scape: pedicel: fu1-fu8: clava = 84(17): 31(11): 21(9), 47(10), 45(10), 40(10), 33(10), 32(10), 30(10), 30(11): 57(13). Mesoscutum (Fig. 71) meshlike reticulate, the reticulations somewhat larger medially than laterally, and with inconspicuous white setae; notaulus extending from spiracle as curved furrow on inclined anterior surface, its posterior limit dorsally contiguous with posterior limit of anteroadmedian line and together extending posteriorly as obscure line of smaller reticulations; parapsidal line a distinct region of microsculpture posterior to spiracle. Axillae elongate-triangular, separated by about 3 × own width (Fig. 71). Scutellum low convex, about 1.2 × as long as wide; meshlike reticulate similar to mesoscutum, the reticulations about same size as on lateral lobe (Fig. 71); with inconspicuous white setae. Mesopleuron with exposed, bare lower mesepimeron; acropleuron very shallowly meshlike reticulate near tegula but mostly meshlike coriaceous anterior to oblique microsculptured region, and longitudinally coriaceous-alutaceous posteriorly. Fore wing with cc: mv: stv: pmv = 54: 33: 10: 13; basal cell entirely setose; cubital area bare except near mediocubital fold and closed by setae along posterior margin over about apical half; disc uniformly setose except for short region along mediocubital region just beyond basal fold. Metacoxa with relatively short and quite sparse setae along dorsal and ventral margins, with outer surface broadly bare except for line of setae along basal margin. Propodeum with callus comparatively sparsely setose to posterior margin; bare anteriorly between spiracle and foramen. Gaster (Figs 17, 36) about 2.7 × as long as mesosoma, with inconspicuous hairlike setae dorsally and laterally, the setae whitish basally but dark apically; posterior margin of penultimate tergum clearly not extending to level of cerci, the precercal portion equal in length to about half distance between cerci; syntergum with medial length measured to apex of penultimate tergum almost 6 × transcercal width, conspicuously compressed posterior of level of cerci, and almost 1.5 × as long as penultimate tergum.

MALE (Fig. 44). ALLOTYPE: length about 4.1 mm. Similar to holotype except as follows. Color. Head with arm of M-like coppery region on upper face ventrally contiguous with inner orbit, and lower face more distinctly coppery; tegula dark; mesoscutal lateral lobe above prepectus more reddish-coppery similar to dorsomedial region; legs (Fig. 44), including tarsi, much more extensively dark, with only knees of front and middle legs narrowly, apex of metafemur narrowly, and base of basal segment of pro- and metatarsus yellowish.

Structure/setation. Head in dorsal view about 1.8 × as wide as long, with IOD about 0.44 × head width; IOD: MPOD: OOL: POL: LOL = 60: 15: 10: 18: 11; in frontal view about 1.2 × as wide as high, with dorsal margin of torulus at level of lower orbits; malar space about 0.57 × eye height. Antenna (Fig. 44) with flagellum less conspicuously elongate-slender, with length of flagellum + pedicel about 1.78 × width of head; scape: pedicel: fu1-fu8: clava = 69(20): 30(10): 15(8), 28(10), 28(10), 26(10), 22(10), 22(10), 20(10), 20(10): 50(10). Fore wing with cc: mv: stv: pmv = 57: 31: 10: 12. Propodeal callus setose only near anterior margin except for a couple of setae lateral to and posterior to spiracle.

Variation.

Females vary in length from about 4.5-6 mm and males from about 3.8-4.2 mm. Females and males have a similar color pattern to the holotype and allotype though extent and intensity of the brown regions of the middle and hind legs are variable, the metafemur sometimes with up to about the apical half yellowish-orange and the metatibia sometimes being more or less entirely yellowish-orange. Intensity of the coppery region on the upper face in females is also somewhat variable, the upper arms sometimes not quite extending to the posterior ocelli or sometimes almost filling the interocellar triangle. Some females have the dorsomedial mesoscutal region dark without a distinct coppery luster, but the general color pattern is similar to that described for the holotype. Also, the combined notauli/anteroadmedian lines are often slightly depressed as well as having smaller reticulations and therefore are visible, though relatively obscurely so, as parallel paramedial lines over about the anterior two-thirds of the mesoscutum.

Biology.

Primary parasitoid of Agrilus coxalis Waterhouse ( Coleoptera : Buprestidae ) associated with Quercus emoryi (Emory oak).

Distribution.

Southwestern USA (Arizona)(Map 3), but undoubtedly also at least Mexico and possibly south to Guatemala along with its known host.

Recognition.

Because of a conspicuously elongate-slender gaster and syntergum, females of Calosota elongata are most similar to those of Calosota longiventris . However, the syntergum of Calosota elongata always has a distinct precercal portion, whereas this is usually lacking from Calosota longiventris because the penultimate tergum normally extends to or slightly posterior to the level of the cerci. Females of Calosota elongata also have much longer flagellomeres, a more distinctly bicolored mesoscutum (cf. Figs 17, 18), the middle and hind legs always partly brown (cf. Figs 36, 37), and the fore wings hyaline (cf. Figs 36, 37). Males of Calosota longiventris differ from those of Calosota elongata most conspicuously by their shorter flagellomeres and more uniformly colored mesoscutum, but also by a more uniformly yellowish-orange middle leg (cf. Figs 44, 45).