Lasalleistichus longicaulis, Hansson, 2020

Hansson, Christer, 2020, Lasalleistichus a new genus of Tetrastichinae (Hymenoptera: Eulophidae) from the Neotropical regionı including four new species, Journal of Natural History 54 (9), pp. 621-633 : 631-632

Lasalleistichus longicaulis , sp. n.

( Figures 2 (c), 3(d))

Diagnosis. Similar to L. albiclava but petiole longer, 2.2× as long as wide ( Figure 3 (d)).

Description. Female holotype. Length 1.8 mm. Head. See description for genus. Mesosoma. Mesoscutum convex, sidelobes with very weak reticulation, midlobe with engraved and strong reticulation in anterior ¾, with very weak reticulation in posterior ¼; midlobe with a ± complete median groove. Mesoscutellum smooth between submedian grooves, lateral to grooves with very weak reticulation, partly smooth. Axillae smooth and shiny. Propodeum with weak reticulation throughout; callus with three setae. Fore wing with four setae on the dorsal surface of submarginal vein. Metasoma. Petiole with 1 + 1 spines anterolaterally. Gaster ovate; tergites smooth and shiny.

Ratios. Head: w/l (dorsal view) 1.96; w/l (frontal view) 1.21; POL/OOL 1.64; posterior ocellus w/POL 2.14; head w/mss w 1.27; mouth w/MS 1.73; MS/HE 0.49; scape l/HE 0.89; distance toruli to anterior ocellus/toruli to mouth margin 1.09; flg+ped l/mss w 1.54; scape l/ w 4.44; F1 l/ w 3.11; F2 l/ w 1.80; F3 l/ w 1.40; clava l/ w 3.0; ped l/F1 l 0.79; F1 l/F2 l 1.56; F1 l/ F3 l 2.0; F1 l/clava l 0.93; F2 l/clava l 0.60; F3 l/clava l 0.47; F1 w/ped w 1.29; antennal spicule l/C3 l 0.40. Mesosoma: l/ w 1.68; midlobe msc l/sct l 1.26; dorsellum l/ppd l 0.40; sct l/ w 0.95; distance between smg anteriorly/posteriorly 0.62; part between smg w/part lateral of smg w (both measured medially) 2.75; part between smg l/w (width measured medially) 1.73; CC l/ w 32.0; CC l/MV l 0.82; MV l/SV l 5.57. Metasoma: petiole l/ w 2.24; gaster l/ w 1.74; gaster l/mss l 0.95; Gt 7 l/ w 0.42; longest cercal seta l/next longest cercal seta l 3.0.

Colour. Head yellowish-brown ( Figure 2 (c)), frons paler below the level of toruli. Antennal scape yellowish-white with dorsal edge yellowish-brown, pedicel dark yellowish-brown, F1 – F3 dark brown, clava with C1 brown with apical part white, C2 – C3 white ( Figure 2 (c)). Pronotum, mesoscutum and axillae yellowish-brown; mesoscutellum dark yellowish-brown with parts adjacent to submedian grooves black; setae on pronotum, mesoscutum and mesoscutellum black ( Figure 3 (d)). Dorsellum yellowish-brown. Propodeum dark yellowish-brown. Pleura dark yellowish-brown ( Figure 2 (c)). Tegulae dark brown; wing venation yellowish-white; fore wing hyaline with median part distinctly infuscate ( Figure 2 (c)); hind wing completely hyaline. Legs ( Figure 2 (c)) with fore coxa white with apical one-third dark brown, mid coxa brown, hind coxa white with posterior surface dark brown; trochanters on fore and mid legs dark yellowish-brown, white on hind leg; femora and tibiae dark yellowish-brown; fore tarsus dark yellowishbrown, mid and hind tarsi yellowish-white with tarsomere 4 dark yellowish-brown. Petiole dark yellowish-brown ( Figure 3 (d)). Gaster dark brown, posterior one-half almost black ( Figure 3 (d)).

Variation. Length 1.6 – 2.1 mm. Paratypes with femora and tibiae dark brown. Mesoscutellum and pleura dark brown in two paratypes. Propodeal callus with two setae in one paratype.

Material examined. HOLOTYPE ♀ ‘ BRAZIL: Bahia Fazenda, Matiapa Camara , 14.x.1978, F. Benton ’ in NHM.

5♀ PARATYPES. 1♀ ‘ BRAZIL: Bahia Mucari, x.1978, F. Benton ’ ( NHM); 3♀ ‘ PERU: Madre de Dios, Rio Tambopata Res ., 30 km SW Puerto Maldonado, 290 m, 3 – 16.x.1983, N.E. Stork ’ ( NHM); 1♀ from the same locality as previous but collected x.1983 ( NHM).

Distribution. Brazil, Peru.

Etymology. From the Latin caulis = stem, stalk, referring to the very long petiole.

Figures

Figure 2. (a) Lasalleistichus albiclava, ♂ paratype habitus lateral. (b) L. fuscicoxa, ♀ holotype habitus lateral. (c) L. longicaulis, ♀ holotype habitus lateral. (d) L. albiclava, ♂ paratype habitus dorsal. (e) L. fuscicoxa, ♀ holotype habitus dorsal. Scale 1 mm.

Figure 3. (a) Palmistichus ixtlilxochitli, ♀ nontype habitus lateral. (b) Agmostigma frontale, ♀ holotype habitus lateral. (c) Lasalleistichus albiclava, ♂ paratype head lateral. (d) L. longicaulis, ♀ holotype habitus dorsal. Scales: (a–b, d) 1 mm; (c) 0.5 mm.