Andreimyrme laminatihumeralis 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 laminatihumeralis

description: Andreimyrme laminatihumeralis Okayasu, sp. nov.
(Figs 3, 21, 38, 52, 65, 79, 90)
Diagnosis. FEMALE. Head black; frons, vertex, and gena punctures large confluent; vertex with medial longitudinal carina; clypeus with medial tubercle. Mandible wide tridentate, oblique to apex, dorsal subapical tooth distinct but smaller than middle subapical tooth, middle subapical tooth subequal to apical tooth. F1 black. Mesosoma red; dorsal thoracic length 0.91–0.95× mesosomal width; humeral carina lamellately projecting; posterior propodeal face without medial longitudinal carina. Legs largely yellowish red with apices of meso- and metafemora, meso- and metatibiae, and tarsi dark brown to black. Metasoma black; T2 length 0.89–0.92× width; T2 disc narrowly depressed medially, with anteromedial elongate spot of pale golden setae; T2 punctures large confluent; T2 posterior band wide, pale golden, complete; T3 with wide uniform band of pale golden to golden setae; S1 brown; 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 5.9 mm – 8.1 mm (holotype: 8.1 mm; mean: 6.9 mm). Color and setae. Head black with antennal rim yellowish brown to dark brown; mandible basal 2/3 yellowish brown: palpi brownish yellow; scape and pedicel brown; flagellum dark brown to black; F2–10 ventrally yellow to brown; mesosoma yellowish red; legs yellowish red with protibia yellowish red to dark brown; meso- and metafemoral apices, mesoand metatibiae, and tarsi dark brown to black; metasoma black with S1 brown. Frons and vertex with sparse short recumbent and sparser long erect golden-tinged black setae; antennal scrobe with sparse short recumbent golden setae; eye dorsal margin with long erect black setae; gena, clypeus, and scape with sparse long recumbent pale golden to golden setae; mandible, posterior propodeal face, T1, T2 around margins, T3, T4–5 laterally, T6, and S1–6 with sparse long erect pale golden to golden setae; prementum, stipes and palpi with extremely short erect golden setae; pedicel and F1 with sparse short recumbent golden setae; F2–10 with dense extremely short recumbent pale golden to golden setae; thoracic dorsum with sparse short recumbent golden to black and sparser long erect black setae; propleuron, mesopleuron posterior half, coxae and trochanters with sparse short appressed and sparser long erect pale golden setae; lateral face of mesosoma with sparse short appressed pale golden setae; femora and tibiae with sparse short recumbent and sparser long erect pale golden to golden setae; tarsi with sparse long appressed pale golden to golden setae; T2 disc with dense short recumbent and sparse short erect black setae; T4–5 medially 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 pale golden to golden setae; T2 with narrow elongate (2.06–2.92× as long as wide; holotype: 2.00; mean: 2.33) anteromedial spot of dense appressed pale golden to golden setae reaching anterior margin of T2, and with posterior narrow band of dense appressed pale golden to golden setae slightly widened medially; minimum distance between spot and band on T2 1.85–2.14× (holotype: 1.85; mean: 2.00) spot length; T2 with lateral golden felt line; T3 with wide uniform band of dense appressed pale golden to golden setae.
Structure. Head 1.37–1.47× (holotype: 1.37; mean: 1.43) as wide as long in dorsal view; lateral margins strongly convergent behind eye; posterior margin truncate; vertex rounded posteriorly in lateral view; gena narrow with GOI = 1.50–1.74 (holotype: 1.74; mean: 1.59); vertex with short medial longitudinal carina reaching upper frons; lower frons without medial 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 0.97– 1.00× (holotype: 0.97; mean: 0.98) eye height; eye height 2.60–2.96× (holotype: 2.96; mean: 2.73) malar distance; vertex width 1.04–1.12 × (holotype: 1.09; mean: 1.08) 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 tridentate, oblique 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 1.14–1.27× (holotype: 1.24; mean: 1.21) its width and 1.33–1.40× (holotype: 1.40; mean: 1.36) F2 length; F2–10 almost same in length and width; F10 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 (mean in parenthesis) = 100:71–75 (73):76–79 (77):71–75 (73):75–76 (75.7):109–111 (110), 100:75:79:75:76: 111 in holotype; dorsal thoracic length 0.91–0.95× (holotype: 0.91; mean: 0.94) pronotal width; thoracic dorsum evenly convex in lateral view; anterior margin of dorsum of pronotum nearly straight, with a pair of small rounded sublateral tubercles; pronotum laterally weakly projecting but not forming distinct angle at pronotal spiracle; lateral margin of mesosoma weakly crenulate; humeral angle angulate; humeral carina lamellately projecting; 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 five spines on outer face; protarsus with external comb of long spines.
T1 without distinct dorsum; T2 disc medially narrowly depressed; dorsal T2 length 0.89–0.92 × (holotype: 0.89; mean: 0.91) 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.
Frons, vertex, gena, thoracic dorsum, T1 posterior half, and T2 disc with large confluent punctures; clypeus, pedicel, F1 with minute sparse punctures; scape, pronotal collar, propleuron, femora, tibiae, tarsi, T1 anterior half, and S1 with small sparse punctures; F2–10, lateral face of pronotum, mesopleuron, metapleuron, lateral propodeal face, coxae, trochanters with minute dense punctures; posterior propodeal face reticulate; mesopleuron with minute dense punctures, with few large punctures on posterior half; T2 laterally and S2 with large dense punctures; T3–6 and S3–6 with small dense punctures; pygidial plate finely longitudinally rugose on anterior 4/9, obscurely granulate posteriorly.
Type material. 3♀. Holotype ♀: Malaysia: TERENGGANU: Kuala Terengganu, near Kenyir Lake, 4.III.2003, T. Tsuru leg. [TUA]. Paratypes: Indonesia: ACEH: Sumatra Island, Aceh, Kota Cane, 28.IV.1998, H. Takizawa leg. [2♀ TUA].
Distribution. Indonesia: Aceh. Malaysia: Terengganu.
Etymology. The specific name laminatihumeralis is from a Latin singular feminine adjective laminata, meaning “lamellate”, and a Latin singular feminine adjective humeralis, meaning “humeral”, a compound Latin adjective in the nominative case referring to the lamellately projecting humeral carina of this new species, which is a key feature to separate it from A. matsumotoi and A. substriolata.
Remarks. This new species is similar to A. matsumotoi sp. nov. and A. substriolata by having the combination of the mandible wide, F1 black, the T2 spot elongate, the T3 with a pale setal band, and the pygidial plate finely longitudinally rugose, but differs by having the mandible apically oblique (vertical in A. matsumotoi and A. substriolata), the humeral carina lamellately projecting (weakly developed in A. matsumotoi and A. substriolata), the T2 disc narrowly depressed medially (flattened in A. matsumotoi and A. substriolata), the T2 punctures large confluent (small confluent in A. substriolata), the S2 punctures evenly distributed and separated by approximate puncture diameter (S2 punctures postero-laterally denser in A. matsumotoi; S2 punctures separated by more than 1.5× puncture diameter in A. substriolata), and the lateral margins of pygidial plate subparallel (convergent anteriorly in A. matsumotoi). By having the mandible apically oblique, A. laminatihumeralis sp. nov. is similar to A. neaera, A. paniya, and A. sarawakensis, but this new species differs from these by having the mandible wider, the T2 coarsely punctate, and the T3 with a pale setal band. Although this species is distributed in Peninsular Malaysia and Sumatra, no differences were found between the continental and island populations.
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 12-13, DOI: 10.11646/zootaxa.5061.1.1, http://zenodo.org/record/5642158