Andreimyrme matsumotoi Okayasu & Williams & Lelej & Pham 2021, sp. nov.
Creators: name: Okayasu, Juriya
name: Williams, Kevin A.
name: Lelej, Arkady S.
name: Pham, Thai Hong
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mutillidae
Andreimyrme
Andreimyrme matsumotoi

description: Andreimyrme matsumotoi Okayasu, sp. nov.
(Figs 4, 22, 39, 53, 66, 80, 90)
Diagnosis. FEMALE. Head black; frons, vertex, and gena punctures large confluent; vertex with medial longitudinal carina; clypeus with medial tubercle. Mandible wide tridentate, vertical to apex, dorsal subapical tooth distinct but smaller than middle subapical tooth, middle subapical tooth subequal to apical tooth. F1 black. Mesosoma entirely red; dorsal thoracic length 0.92× mesosomal width; humeral carina weakly developed; posterior propodeal face with medial longitudinal carina. Legs black with femoral bases yellowish red. Metasoma black; T2 length 0.92× width; T2 disc flattened medially, with anteromedial elongate spot of golden setae; T2 punctures small confluent; T2 posterior band wide, pale golden, complete; T3 with wide uniform band of golden setae; S1 dark brown; S2 punctures large dense; surface of pygidial plate longitudinally rugose anteriorly and granulate posteriorly, with many granule coalescing and forming longitudinally rugose surface; lateral margins of pygidial plate convergent anteriorly, carinate on posterior half. MALE. Unknown.
Description. FEMALE. Body length 12.1 mm. Color and setae. Head black with antennal rim, mandible medial 1/4, scape apex, and pedicel dark brown; palpi yellowish brown; F2–7 ventrally yellow; mesosoma yellowish red; legs black with coxae, trochanters, and femoral bases yellowish red; tibial spurs yellow; metasoma black with S1 dark brown. Lower frons, gena, femora, tibiae, and S2 with sparse long recumbent and sparse long erect golden setae; upper frons and vertex with sparse short recumbent and sparser long erect black setae; antennal scrobe with sparse long appressed golden setae; eye dorsal margin with long erect black setae; clypeus with sparse long recumbent golden setae; mandible, posterior propodeal face, propleuron, procoxa, T1, T2 around margins, T3, T4–5 laterally, T6, S1, and S3–6 with sparse long erect golden setae; prementum, stipes and palpi with sparse extremely short erect golden setae; scape with sparse long recumbent golden setae; pedicel and F1 with sparse short recumbent golden setae; F2–10 with dense extremely short recumbent golden setae; thoracic dorsum with sparse short recumbent and sparser long erect black setae; lateral face of mesosoma with sparse short appressed golden setae; mesopleuron posterior half, lateral propodeal face, meso- and metacoxa, and trochanters with sparse short appressed and sparser long erect golden setae; tarsi with sparse long appressed golden setae; T2 disc with dense short recumbent and sparse short erect black setae; T4–5 with dense short recumbent and sparse long erect black setae; pygidial plate glabrous with thickened lateral pygidial fringe of long erect golden setae; T1 and S2–6 with posterior fringe of sparse long golden setae; T2 with narrow elongate (1.96× as long as wide) anteromedial spot of dense appressed golden setae reaching anterior margin of T2, and with posterior narrow band of dense appressed golden setae slightly widened medially; minimum distance between spot and band on T2 1.30× spot length; T2 with lateral golden felt line; T3 with wide uniform band of dense appressed golden setae.
Structure. Head 1.32× as wide as long in dorsal view; lateral margins strongly convergent behind eye; posterior margin truncate. vertex rounded posteriorly in lateral view; gena wide with GOI = 0.85; vertex with medial longitudinal carina reaching lower frons; lower frons with short medial longitudinal groove; genal carina distinct; hypostomal tooth angulate; antennal scrobe with dorsal carina reaching mandibular base; eye oval, slightly protruding from head capsule; minimum distance between eyes 1.05× eye height; eye height 2.38× malar distance; vertex width 1.04× pronotal width; clypeus medially elevated and forming short longitudinal tubercle not reaching anterior margin, with subventral transverse ridge; anterior margin of transverse ridge medially deeply emarginate. Mandible wide tridentate, vertical to apex, dorsal subapical tooth distinct but smaller than middle subapical tooth, middle subapical tooth subequal to apical tooth; ventral margin straight. Prementum with posterior rounded tubercle. Scape bending medially; F1 length 1.12× its width and F2 length; F2–9 almost same in length and width; F10 slightly longer than F9, conical and weakly depressed.
Mesosoma broadest at pronotal spiracles, with lateral margins weakly convergent posteriorly; ratio between head width:humeral width:pronotal width:mesonotal width:propodeal width:metasomal width = 100:83:87:76:79:125; dorsal thoracic length 0.92× pronotal width; thoracic dorsum evenly convex in lateral view; anterior margin of dorsum of pronotum nearly straight, with a pair of small pointed sublateral teeth; pronotum laterally weakly projecting but not forming distinct angle at pronotal spiracle; lateral margin of mesosoma weakly crenulate; humeral angle angulate; humeral carina weakly developed; prescutellar scales and metanotal-propodeal suture obliterated; dorsal and lateral propodeal faces not separated by carina; posterior propodeal face with medial longitudinal carina reaching thoracic dorsum;
Metacoxa with weak complete inner longitudinal carina; meso- and metatibiae with a pair of longitudinal rows of eight spines on outer face; protarsus with external comb of long spines.
T1 without distinct dorsum; T2 disc medially flattened; dorsal T2 length 0.92× T2 width; S1 with straight medial longitudinal carina; S2 with anteromedial short inconspicuous longitudinal carina; posterior margin of S6 bidentate; pygidial plate slightly convex, elongate; lateral margins of pygidial plate convergent anteriorly, weakly carinate on posterior half.
Frons, vertex, gena, and thoracic dorsum with large confluent punctures; clypeus, pedicel, F1, tibiae, and tarsi with minute sparse punctures; scape, pronotal collar, propleuron, T1 anterior half, and S1 with small sparse punctures; F2–10, metapleuron, and lateral propodeal face with minute dense punctures; posterior propodeal face reticulate; lateral face of pronotum with minute dense and large dense punctures; mesopleuron with minute dense punctures, with few large punctures on ventral half; coxae, trochanters, and femora with minute dense and small sparse punctures; T1 posterior half and T2 disc with small confluent punctures; T2 laterally with large dense punctures; S2 with large dense punctures medially, confluent postero-laterally; T3–6 and S3–6 with small dense punctures; pygidial plate finely longitudinally rugose on anterior 7/8, granulate posteriorly, with many granule coalescing and forming longitudinally rugose surface.
Type material. 1♀. Holotype ♀: Vietnam: VINH PHUC: Tam Dao, 900–1200 m, 6.V.1998, R. Matsumoto leg. [VNMN].
Distribution. Vietnam: Vinh Phuc.
Etymology. The specific name matsumotoi is dedicated to the type collector Rikio Matsumoto.
Remarks. This new species is superficially similar to A. substriolata, and these two species are separated by minor morphological differences, namely the density of S2 punctures and the shape of pygidial plate. Andreimyrme matsumotoi is, however, more than 1.2 times larger than A. substriolata, suggesting utilization of larger hosts because the body size of mutillids correlates to that of the hosts (Mickel 1924; Ferguson 1962). Additional specimens will enable formal analyses to test this hypothesis.
description: Published as part of Okayasu, Juriya, Williams, Kevin A., Lelej, Arkady S. & Pham, Thai Hong, 2021, Review of female Andreimyrme Lelej (Hymenoptera: Mutillidae: Smicromyrmini), pp. 1-38 in Zootaxa 5061 (1) on pages 13-15, DOI: 10.11646/zootaxa.5061.1.1, http://zenodo.org/record/5642158