Lomachaeta juanita Williams, 2019

Williams, Kevin A., Cambra, Roberto A., Bartholomay, Pedro R., Luz, David R., Quintero, Diomedes & Pitts, James P., 2019, Review of the genus Lomachaeta Mickel, 1936 (Hymenoptera: Mutillidae) with new species and sex associations, Zootaxa 4564 (1), pp. 101-136 : 122

Lomachaeta juanita Williams , sp. nov.

( Figs 56 , 71, 72 )

Diagnosis. MALE. This species can be recognized by the following combination of characters: the body is black, except the obscure pale yellow T1 apex; the mandible lacks a ventral tooth basally; the gena is weakly carinate; the head and pronotum are areolate; the forewing has veins encompassing the basal 0.7 × wing; the T1 shape is disciform; the T2 disc has dense small punctures; the T2 fringe is composed of thick bristles; and the paramere is virtually straight except its downcurved apical third with a weak apical setal tuft and a few long setae along inner face medially. Body length 4.2 mm.

Description. MALE. Body length 4.2 mm. Coloration. Entire body black, except mandible, tegula, and trochanter partly orange-brown and T1 apex obscurely pale yellow. Tibial spurs white. Wings pale brown, lighter basally, veins brown. Body setae whitish, except tergal fringes with pale yellow or blackish bristles and apical tergites with more or less extensive blackish setae. Head. Rounded posteriorly. Frons areolate-rugose, vertex punctate, gena areolate. Mandible tridentate apically, unarmed ventrally. Gena with weak ventral carina. Ocelli small; ocellocular distance 5 × length of lateral ocellus, interocellar distance 1.8 × lateral ocellar diameter. F1 1.1 × pedicel length; F2 1.7 × pedicel length. Mesosoma. Pronotum and mesoscutum areolate. Pronotum anterior and dorsal faces separated by complete carina. Tegula smooth with few punctures, margin setigerously punctate. Mesopleuron coarse areolate. Metapleuron smooth. Scutellum slightly convex, areolate. Axilla sessile with mesoscutum, with smooth curved sharp posterior tooth. Propodeum areolate dorsally, lateral face smooth anteriorly with areolations posteriorly. Forewing with veins encompassing basal 0.65 × wing; marginal cell as measured on costa 1.8 × stigma. Metasoma. T1 shape nodose, with obscurely defined anterior and dorsal faces, anterior face convex. T2 with coarse separated punctures, intervals smooth; T2–4 fringes composed of thick pale yellow convergent bristles. S2 punctures coarser and sparser than T2 punctures. T3–6 punctate. T7 rugo-punctate. Hypopygium punctate, sharply bidentate posteriorly. Genitalia ( Figs 71, 72 ). Paramere laterally subcompressed, straight in basal two thirds, apical third downcurved, acuminate apically, with three long (~2 × paramere width) setae along inner margin medially and small clump of setae at inner apex. Cuspis with posteroventral setae sparse and ~1.5 × cuspis length. Penis valve unidentate apically.

FEMALE. Unknown.

Material examined. Holotype, ♂, COLOMBIA, Magdalena, Parque Nacional Natural Tayrona, Neguanje , 11°20’N 74°2’W, 10m, 9–17.IX.2001, Malaise, R. Henriquez, M. 2137 (IAvH, Figs 56 , 71, 72 ).

Distribution. Known only from the type locality in Magdalena, Colombia.

Etymology. KAW is happy to name this species in honor of his friend and colleague Juanita Rodriquez- Arrieta, in honor of her contributions to wasp systematics and in gratitude for her help with finding and borrowing the type specimen from the IAvH in 2011. Treat as a noun in apposition.

Remarks. This is the third South American species based on males to be discovered. It shares its range with L. hyphantria , which has even been found in the same National Park (PNN Tayrona) but can be immediately differentiated from that species by the weak genal carina (strong in L. hyphantria ) and the short marginal cell (~3 × stigma in L. hyphantria ). It therefore seems closely related to L. vianai , but the nodose T1 shape and downcurved paramere set it apart as a distinct species.

Figures

FIGURES 53–56. Lomachaeta males; lateral habitus. 53) L. hyphantria, Brazil; 54) L. hyphantria, Colombia; 55) L. vianai; 56) L. juanita, sp. nov. Scale bar = 1 mm.

FIGURES 65–72. Lomachaeta line drawings: female mandible (65, 66), male genitalia, lateral view (67, 69, 71), penis valve, lateral view (68, 70, 72). 65) L. hicksi; 66) L. beadugrimi; 67–68) L. calamondin, sp. nov.; 69–70) L. eironeia, sp. nov.; 71–72) L. juanita, sp. nov.