Manlaya minima, Álvarez-Parra & Huang, 2024

Álvarez-Parra, Sergio & Huang, Di-Ying, 2024, A new species of Manlaya (Hymenoptera: Baissidae) from the Lower Cretaceous Shouchang Formation, Eastern China, Zootaxa 5562 (1), pp. 56-64 : 58-61

Manlaya minima sp. nov.

urn:lsid:zoobank.org:act:33A8CDE5-1B96-4CBD-8C5E-2BDC059F35DA

( Figs 1–3 )

Type material. Holotype NIGP206130 , a female specimen from lateral view, distalmost parts of wings and ovipositor not preserved. Type locality and horizon. Lower Cretaceous Shouchang Formation ( upper Barremian to lower Aptian ); Shanghujia Village (Dongcun section), Shouchang Township, Jiande City, Zhejiang Province, China .

Etymology. From the Latin word minimus, meaning very small, referring to the small body size in comparison to other species of the genus.

Diagnosis. Body size small (about 2 mm long); pedicel thicker than scape; pterostigma broad, with anterior margin straight and posterior margin curved; r-rs slightly inclivous, half longer than pterostigma width; 1Rs separated from pterostigma base by length 2× pterostigma basal width, slightly longer than 1M; cell 1mcu strongly transverse, with 1Rs+M and 1Cu parallel; 2Rs+M as long as 1m-cu; 1cu-a slightly postfurcal; cell 2mcu elbowed; vein A sigmoidal basally.

Description. Female. Body stout, 2.07 mm long ( Fig. 1 ). Colour dark brown, head and mesonotum darker than rest of body. No setation.

Head: 0.34 mm long and 0.43 mm high ( Fig. 2A ); eyes large, rounded, occupying most of side of head, 0.22 mm in diameter; preserved part of antenna about 0.68 mm long, pedicel 0.08 mm long and 0.06 mm wide, thicker than scape (number of flagellomeres uncertain); mouthparts apparently protruded.

Mesosoma: stout ( Fig. 2B ), 0.70 mm long, as long as high (height measured from just above the procoxa); pronotum about 0.15 mm long; mesonotum humped antero-dorsally ( Fig. 2C ), 0.35 mm long and 0.22 mm high; metanotum narrow, 0.10 mm long; propodeum with extended surface, slightly protruding posteriorly.

Forewing: incomplete, at least 1.55 mm long ( Fig. 3 ); costal cell narrower than pterostigma; pterostigma broad, 1.8× longer than wide; crossvein r-rs arising medially from pterostigma, slightly inclivous, half longer than pterostigma width; vein 1Rs originating proximad pterostigma base, separated from pterostigma base by length 2× pterostigma basal width; veins 1Rs and 1M aligned, curved; 1Rs 1.3× longer than 1M; 1Rs+M 2.3× longer than 2Rs+M; cell 1mcu strongly transverse, parallel-sided, 3× longer than wide; 2Rs+M about as long as crossvein 1mcu; crossveins 2r-m and 3r-m completely absent (no stubs); distal abscissa of Rs strongly bent anteriorly at point where distal r-m should be present, virtually extending straight towards nearly wing apex; cell 2+3rm narrower than cell 3r at level of pterostigma apex; distal abscissa of M strongly bent posteriorly at point where distal r-m should be present, straight; vein M+Cu mostly spectral; crossvein 1cu-a slightly postfurcal; cell 2mcu elbowed; crossvein 2m-cu distinctly distad r-rs, as long as r-rs level; vein A sigmoidal basally.

Hind wing: not visible.

Legs: partly preserved, thin ( Fig. 2D ); hind femur nearly as long as hind tibia; hind femur about 5× longer than wide; hind tibia about 6× longer than wide; tarsi pentamerous; hind basitarsus much longer than remainder tarsomeres combined.

Metasoma: ovoid from lateral view ( Fig. 2E ), 1.03 mm long and 0.76 mm wide; metasoma 1.5× longer than mesosoma; seven metasomal segments distinguished, first segment the longest; ovipositor incomplete, thin, slightly bent upwards, length as preserved: 0.64 mm.

Figures

FIGURE 1. Manlaya minima sp. nov., holotype NIGP206130, female, from Lower Cretaceous Shouchang Formation (China). A, Photograph of the habitus. B, Interpretative drawing of the habitus. Both at the same scale.

FIGURE 2. Manlaya minima sp. nov., holotype NIGP206130, female, from Lower Cretaceous Shouchang Formation (China). A, Head. B, Mesosoma and head. C, Dorsal part of the mesosoma with indication of the mesonotum humped antero-dorsally (black arrowhead) and the propodeum with extended surface and slightly protruding posteriorly (white arrowhead). D, Legs. E, Metasoma with indication of metasomal segments.

FIGURE 3. Forewing of Manlaya minima sp. nov., holotype NIGP206130. A, Photograph of the forewing. B, Name of veins. C, Name of cells. B and C at the same scale.