Andreimyrme silvorientalis 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 silvorientalis

description: Andreimyrme silvorientalis Okayasu, sp. nov.
(Figs 10, 27, 44, 58, 71, 85, 91)
Diagnosis. FEMALE. Head black; frons, vertex, and gena punctures large confluent; vertex with medial longitudinal carina; clypeus with medial tubercle. Mandible wide, subapical teeth obliterated, replaced by blunt expansion. F1 black. Mesosoma entirely red; dorsal thoracic length 0.98× mesosomal width; humeral carina obliterated; posterior propodeal face without medial carina. Legs black with femoral bases yellowish red. Metasoma black; T2 length 0.90× width; T2 disc medially flattened, with anteromedial spot reduced to few golden setae; T2 punctures small confluent; T2 posterior band wide, pale golden, complete; T3 with wide uniform band of golden setae; S1 black; S2 punctures large dense; surface of pygidial plate longitudinally rugose anteriorly and granulate posteriorly; lateral margins of pygidial plate subparallel, carinate throughout. MALE. Unknown.
Description. FEMALE. Body length 10.5 mm. Color and setae. Head black with antennal rim, palpi, scape apex, and pedicel dark brown; mandible except apical 1/4 and basal outer face yellowish brown; F2–10 ventrally brown; mesosoma yellowish red; legs yellowish red with femoral apices, tibiae, and tarsi black; tibial spurs yellow; metasoma black. Frons with sparse long recumbent golden and sparser long erect black setae; vertex with sparse short blackish golden and sparser long erect black setae; antennal scrobe with sparse short appressed pale golden setae; eye dorsal margin with long erect black setae; gena, femora, tibiae, and S2 with sparse long recumbent and sparser long erect golden setae; clypeus, pedicel, and F1 with sparse short recumbent golden setae; mandible, posterior propodeal face, trochanters, T1, T2 around margins, T3, T6, S1, and S3–6 with sparse long erect golden setae; prementum, stipes, and palpi with sparse extremely short erect golden setae; scape and procoxa with sparse long recumbent golden setae; F2–10 with dense extremely short recumbent golden setae; pronotal dorsum with sparse short recumbent and sparser long erect black setae; thoracic dorsum posterior to pronotum with sparse short recumbent golden and sparser long erect black setae; propleuron with sparse short recumbent and sparser long erect pale golden setae; lateral face of mesosoma with sparse short appressed pale golden setae; ventral half of mesopleuron and lateral propodeal face with sparse short appressed and sparser long erect pale golden setae; meso- and metacoxae with sparse short appressed and sparser short 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 sparse long recumbent and sparser 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 anteromedial spot reduced to few golden setae; T2 with lateral golden felt line; T3 with wide uniform band of dense appressed golden setae.
Structure. Head 1.28× 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 = 1.08; vertex with medial longitudinal carina reaching lower frons; lower frons with short medial longitudinal groove; genal carina distinct; hypostomal tooth sharp; antennal scrobe with dorsal carina reaching mandibular base; eye oval, slightly protruding from head capsule; minimum distance between eyes 0.93× eye height; eye height 2.86× malar distance; vertex width 1.00× pronotal width; clypeus medially elevated and forming short longitudinal tubercle not reaching anterior margin, with subventral transverse ridge; anterior margin of transverse ridge medially shallowly emarginated. Mandible wide, inner teeth obliterated, replaced by blunt expansion; ventral margin straight. Prementum with posterior rounded tubercle. Scape bending medially; F1 length 1.13× its width, 1.08× 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 subparallel; ratio between head width:humeral width:pronotal width:mesonotal width:propodeal width:metasomal width = 100:78:88:80:81:119; dorsal thoracic length 0.98× pronotal width; thoracic dorsum posteriorly sloping; anterior margin of dorsum of pronotum nearly straight, with a pair of very weak rounded sublateral tubercles; pronotum laterally weakly projecting but not forming distinct angle at pronotal spiracle; lateral margin of mesosoma weakly crenulate; humeral angle rounded; humeral carina absent; prescutellar scales and metanotal-propodeal suture obliterated; dorsal and lateral propodeal faces not separated by carina; posterior propodeal face without medial longitudinal carina.
Metacoxa with weak complete inner longitudinal carina; meso- and metatibiae with a pair of longitudinal rows of six spines on outer face; protarsus with external comb of long spines.
T1 without distinct dorsum; T2 disc medially flattened; dorsal T2 length 0.90× 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 subparallel, weakly carinate throughout but not enclosed.
Frons, vertex, gena, and thoracic dorsum with large confluent punctures; clypeus, scape, pedicel, F1, pronotal collar, meso- and metacoxae, trochanters, femora, tibiae, and tarsi with minute sparse punctures; F2–10, lateral face of pronotum, metapleuron, and procoxa with minute dense punctures; posterior propodeal face reticulate; propleuron with minute sparse and small sparse punctures; mesopleuron and lateral propodeal face with minute dense punctures, with small sparser punctures; T1 anterior half with small sparse punctures; T1 posterior half and T2 disc with small confluent punctures; T2 laterally and S1–2 with large dense punctures; T3–6 and S3–6 with small dense punctures; pygidial plate finely longitudinally rugose on anterior 2/3, granulate posteriorly.
Type material. 1♀. Holotype ♀: Indonesia: GOLONTALO: North Sulawesi, Pegunungan Tilongkabila [= Mts Tilongkabila], 500–800 m, 14–17.III.2009, K. Takasuka leg. [EUM].
Distribution. Indonesia: Golontalo.
Etymology. The specific name silvorientalis is from a Latin singular feminine noun silva, meaning “forest”, and a Latin singular feminine adjective orientalis, meaning “eastern”, a compound Latin adjective in the nominative case, indicating that this new species is the easternmost record of Andreimyrme in Southeast Asia, with an additional reference to its similarity to the Neotropical genus Silvorientilla Williams & Cambra, 2019 in the mandibular shape (Williams et al. 2019a).
Remarks. This new species is recognized in Andreimyrme by having the dorsal and middle subapical mandibular teeth and the humeral carina obliterated (more or less developed in others). This species was collected by Keizo Takasuka during a field survey in Sulawesi. The collecting site was described by Takasuka et al. (2011).
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 20-21, DOI: 10.11646/zootaxa.5061.1.1, http://zenodo.org/record/5642158