Messatoporus arcuatus ( Cresson 1874 )

Santos, Bernardo F. & Aguiar, Alexandre P., 2013, <strong> Phylogeny and revision of <em> Messatoporus </ em> Cushman (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of sixty five new species </ strong>, Zootaxa 3634 (1), pp. 1-284 : 69-70

Messatoporus arcuatus ( Cresson 1874)

( Figs 75 , 237 , 300 )

* Mesostenus arcuatus Cresson 1874: 156 . Description, keyed. Holotype ♀ (ANSP, not examined). Type data: México, Orizaba. Mesostenus arcuatus: Dalla Torre 1902 . Listed.

Mesostenus arcuatus: Schmiedeknecht 1908:53 . Listed.

* Messatoporus arcuatus: Townes 1946: 32 . Generic transfer.

Messatoporus arcuatus: Townes & Townes 1966: 123 . Listed.

Messatoporus arcuatus: Yu & Horstmann 1997:274 . Listed

Messatoporus arcuatus: Yu et al. 2005 . Listed.

Messatoporus arcuatus: Kasparyan & Ruíz 2005: 106 , 109. Distribution, keyed.

Messatoporus arcuatus: Kasparyan & Ruíz 2008: 308 , 310, 314. Diagnosis, distribution, figure, keyed.

Female. Holotype ♀. Fore wing 10.24 mm. HEAD: Mandible densely covered with moderately long hairs; MLW 1.78; MWW 0.45; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.25. Clypeus basally convex, apically abruptly flattened, centrally concave; CHW 2.53; CWW 6.14; apical area medially concave, laterally with distinct triangular lobes, its margin very sharp, raised. Antenna with 24 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area shiny, impunctate, distinctly striate near antennal sockets, ventrally and around ocelli distinctly concave, dorsally with very weak median line, ventrally fading. Occipital carina dorsally acuminate, fading out at distance shorter than basal width of mandible from the hypostomal carina. Temple and gena moderately wide, gena somewhat swollen and projected (as in Fig. 261 ).

THORAX: Pronotum sparsely pilose, shiny, impunctate, ventrally with strong wrinkles; epomia moderately strong, complete, moderately long, ending near dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum moderately convex, flattened posteriorly, ovoid, 1.24 × as long as wide, anteriorly densely pilose, posteriorly sparsely pilose, shiny, asperous; notaulus reaching about 0.69 of mesoscutum length, moderately impressed, surface over notaulus with weak and short transverse wrinkles; scuto-scutellar groove deep, with distinct longitudinal wrinkles. Subalar ridge moderately projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, distinctly sinuous; sternaulus moderately strong, wider on posterior apex, strongly sinuous, smooth; scrobe moderately deep; mesopleural suture with strong longitudinal wrinkles along entire length. Mesosternum medially with short transverse wrinkles; median portion of posterior transverse carina of the mesothoracic venter moderately long, straight. Transverse sulcus at base of propodeum moderately wide, about 0.54 × as long as anterior area of propodeum, impunctate; metapleuron with very fine and moderately dense punctures, without transverse wrinkles, moderately pilose; juxtacoxal carina absent. Fore tibia distinctly swollen. Mesal lobe of t4 with a distinct cluster of stout bristles. Hind coxa with moderately strong punctures separated by about their own diameter.

PROPODEUM: 1.15 × as long as wide, shiny, moderately pilose; anterior area scarcely punctate; spiracle elongate, SWL 6.5; anterior transverse carina medially straight. Propodeal wrinkles anteriorly very close and moderately strong, posteriorly stronger and more widely spaced, anteriorly faint at median portion, posteriorly partly complete and partly incomplete, mostly slightly curved or somewhat sinuous; posterior transverse carina distinct as very weak sublateral crests.

WINGS: Fore wing vein 1-Rs+M very weakly sinuous, with bulla placed around its midlength; crossvein 1mcu more or less uniformly curved, totally continuous with 1-Rs+M; vein 1M+Rs anteriorly straight, posteriorly curved; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.58 of its own length; vein 2Cua 0 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed on midlength; cell 1+2Rs small, APH 0.37, subquadratic, distinctly wider than high, AWH 1.22; crossvein 3r-m fully spectral, 2r-m and 3r-m subparallel, about same length; vein 3-M almost indistinct; 4-Rs distinctly sinuous; 4-M tubular, straight. Hind wing vein 1-M forming straight angle with vein Cua; vein 2-Rs entirely tubular, apically weaker, reaching wing margin; HW1C 1.23; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.8 of distance to posterior wing margin.

METASOMA: First tergite moderately long, about 0.41 × as long as T2–8, somewhat depressed, ventrolaterally rounded, dorsally glabrate, laterally moderately pilose; T1LW 3.49; T1WW 1.75; spiracle on 0.56 of its length, distinctly prominent; median depression elongate, distinct; lateral and median posterior depressions absent; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.11; T2WW 1.93; thyridium longer than wide, with small circular depression just behind it; T2–8 minutely and very weakly coriarious, moderately and uniformly pilose except glabrate postero-dorsal area in T2–3. OST 1.74; ovipositor moderately stout, slightly upcurved, basally cylindric, apically distinctly depressed; dorsal valve with four moderately strong ridges; ventral valve apex with 9 teeth, 1st and 2nd widely spaced; surface anterior to first tooth rugulose.

Color. Head, mesosoma and metasoma black and whitish. Head: black; clypeus, basal 0.4 of mandible, mouthparts, supra-clypeal area, ventral spot at scape and complete orbital band, whitish (229, 214, 146); f7–12 entirely white, f6 partially white, f13–14 dorsally white. Mesosoma: black; collar, dorsal margin of pronotum, propleuron, subcircular spot on mesoscutum, scutellar carina, scutellum except posterior margin, axillar carinae, tegula, subalar ridge, central mark on mesopleuron, mesosternum, dorsal division of metapleuron, metapleural triangle centrally, metapleuron except posterior apex and arc-shaped mark on propodeum, yellow (225, 212, 118); fore and mid coxae and first trochanters whitish, fore coxa with posterior face and weak apical mark dark brown, mid one with distinct apical mark and small posterior spot dark brown; first trochanters with basal dark brown mark; fore and mid second trochanter, femur, tibia and tarsus bright yellow (224, 179, 056), second trochanters basally dark brown, femora with dorsal dark brown stripes, fore tibia with ventral brownish mark on basal 0.7, mid tarsus fuscous, fore and mid t5 blackish; hind coxa whitish with three longitudinal stripes, anterior and posterior ones reaching 0.6 of its length, lateral one basally wider, apically bifurcated and reaching coxa apex; hind first trochanter whitish with basal blackish mark; second trochanter blackish, with apical 0.2 dark yellow; hind femur with extreme base dark yellow, otherwise bright yellow, with anterior and posterior dark brown stripes apically connected; hind tibia bright yellow, hind tarsus basally bright yellow, whitish towards apex. Metasoma: black; anterior 0.4 and posterior 0.2 of T1 whitish; T2–5 with sub-posterior whitish stripes, T6–7 with posterior whitish stripes; T8 with lateral whitish marks; S1–6 whitish, S2–4 with progressively smaller brown lateral marks.

Male. Not examined. According to Kasparyan & Ruíz (2008), very similar to the female except for the following: mandible yellow (except apex); antenna with 27 flagellomeres; and T1–7 with apical blackish stripe.

Variation. Fore wing 8.46–10.24 mm. long. Mandible sometimes almost entirely black, scape sometimes entirely black; subalar ridge sometimes connected to central mark on mesopleuron; sublateral crests on propodeum sometimes conspicuous; one specimen with posterior dark line also at T6; whitish areas sometimes turning to pale yellow (226, 208, 114); ovipositor very slightly to distinctly upcurved.

Comments. Messatoporus arcuatus can be readily recognized by the posterior border of T2–4 black (sometimes also on T1 and T5; in males, all tergites posteriorly black) and T 8 in dorsal view with a somewhat Yshaped blackish mark. Superficially similar to the species from the compressicornis group (see Comments under M. compressicornis ). In addition to the characters above, it can be isolated from species of that group by the following: flagellum uniform, not flattened at subapical 0.3; apex of apical flagellomere much narrower than base (vs. about as wide as base); ovipositor longer (OST 1.74) and slightly upcurved (vs. straight, OST 0.86–1.24); and scutellum black (vs. yellow).

Biology. Unknown.

Material examined. 10 ♀, 2 ♂♂. Homotype ♀ (by Townes ) from MEXICO, Nayarit, Vic Compostela, 10.VI.1933 ( AEIC) . 1 ♀ from MEXICO, Tamaulipas, Gomez Farías , Reserva El Cielo, Los Cedros, 27.VII.1993, night light, Mquinn ( TAMU) . 1 ♀ from EL SALVADOR, Cerro Verde , 915 m, 1.V.1971, HHowden . 1 ♀ from COSTA RICA, Alajuela, pena Blanca, V.1987, ECruz ; 1 ♀ from COSTA RICA, Guanacaste, San Rosa Park , Dry hill, 8.XII.1977, DHJanzen ; 1 ♂, same data except 20.IX.1977 . 1 ♂ from COSTA RICA, Escazú , 25.V.1987, Townes & Townes . 1 ♀ from COSTA RICA, Puntarenas, Monteverde, 9.II.1968, CPalmer ; 1 ♀, same data except I–II.1963. ( AEIC) . 1 ♀ from PANAMA, Canal Zone, Barro Colorado Island , IV–V.1942, JZetek ; 1 ♀, same data except 14.VI.1939 ; 1 ♀, same data except El Cemeno, I.1941 ( USNM) .

Distribution. Widely distributed from northern Mexico to Panama, with records also at Costa Rica and El Salvador ( Fig. 300 ). All records are from tropical or subtropical forests.

Figures

FIGURES 71–75. Lateral view. 71, M. compressicornis*. 72, M. nigriscapus*. 73, M. depressifrons*. 74, M. keraiopetalus. 75, M. arcuatus.

FIGURES 236–241. Hind leg. 236, M. mesonotator. 237, M. arcuatus. 238, M. keraiopetalus. 239, M. mesosternalis. 240, M. albiaterartus*. 241, M. versicolor*.

FIGURES 297–304. Distribution maps for species of Messatoporus. 297, M. antennator 298, M. apertus. 299, M. apiopharkis. 300, M. arcuatus. 301, M. argentinus. 302, M. atlanticus. 303, M. atrifoveus. 304, M. aurantius.

FIGURES 260–271. 260–261, Gena, lateral. 260, M. longicaudis*. 261, M. compressicornis. 262–264, Antenna. 262, M. tibiator. 263, M. compresscornis. 264, M. antennator, male. 265–266, Hind t4. 265, M. paeneater*. 266, M. nigriscutus*. 267–271, Metasoma and ovipositor. 267, M. opacus*. 268, M. discoidalis. 269, M. longicaudis*. 270, M. convexus. 271, M. townesi.