Brachypremna chenhuameii, Men & Hu, 2020
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publication ID |
https://doi.org/ 10.11865/zs.202027 |
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publication LSID |
lsid:zoobank.org:pub:B993A757-C27B-4732-94E4-136A4EB6D5C9 |
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persistent identifier |
https://treatment.plazi.org/id/CA04E109-FFE1-FFCF-0994-548451AEFB41 |
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treatment provided by |
Diego |
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scientific name |
Brachypremna chenhuameii |
| status |
sp. nov. |
Brachypremna chenhuameii sp. nov. ( Figs 1–2 View Figure 1 View Figure 2 )
Diagnosis. The new species can be recognized by following combination of characters: final part of Scabsent, R 5 straight except arched base, R 5 and M 1 divergent; gonocoxite elongated, broad basally and narrowed to the apex, outer gonostylus narrowed, inner gonostylusin the shape of broad lobe, longer than outer gonostylus. The new species is most similar to another fossil species from Dominican amber, B. brodzinskii Krzeminski, 1996, but differs from the latter by the absence of final part of Sc (present in related species), the origin of Rs obliquely arcuated (the origin of Rs right-angled in shape in related species), the petiole of cell m 1 subequal in length to M 2 (the petiole of cell m 1 distinctly shorter than M 2 in related species), the petiole of cell m 1 distinctly longer than the cross vein m-m (the petiole of cell m 1 subequal in length to cross vein m-m in related species), and the discal cell 2.2 times as long as the width (the discal cell 1.7 times as long as the width in related species).
Material examined. Holotype, male, No. AQNU-DIP-2019004, Miocene (18–20 Ma), La Toca mine, Santiago Province , the Dominica Republic.
Description. Measurement (n = 1). Body length 8.36 mm (excluding antenna), wing 10.80 mm, antenna 5.27 mm.
Head. Head brown with black setae ( Fig. 1A View Figure 1 ). Nasus distinct with several black setae on tip. Antenna entirely black, 11-segmented, scape and pedicel cylindrical, slightly expanded apically, first flagellomere subequal in length to scape and pedicel together, remaining flagellomeres progressively shorter and thinner except last segment which is same length to second flagellomere, each flagellomere with numerous black verticils, longest verticil distinctly shorter than its corresponding flagellomere ( Fig. 2A View Figure 2 ). Palpus wholly black, longer than antenna, last segment almost same length to basal three segments together ( Fig. 2B View Figure 2 ).
Thorax. Thorax brown ( Fig. 1A View Figure 1 ). Legs wholly brown ( Fig. 1A View Figure 1 ). Fore leg with femur 8.02 mm, tibia 8.61 mm, tarsi 12.90 mm; middle leg with femur 9.91 mm, tibia 9.20 mm; hind leg with femur 10.50 mm. Wing brown with dark brown venation, narrowed and elongated, transparent, with an elliptic stigma not reaching anterior margin of wing ( Fig. 2B View Figure 2 ). Venation: Sc long, ending distinctly beyond mid-point of wing, sc-r reaching at same level of branch of Rs, final part of Sc absent ( Figs 1C View Figure 1 , 2C View Figure 2 ); Rs distinctly arcuate at base, slightly longer than R 2+3+4; R 1 and R 3 short; R 4 elongated, apical one third curved; R 5 elongated, straight except base arched, R 5 and M 1 divergent; cell m 1 present, slightly longer than its petiole; M 2 as long as petiole of cell m 1; r-m absent; discal cell elongated, approximately 2.2 times as long as width; m-m distinctly shorter than petiole of cell m 1; m-cu reaching discal cell at distal one fourth; CuA and CuP relatively straight with apex slightly bent, A 1 straight. Halter with stem yellow, knob black ( Figs 1B View Figure 1 , 2C View Figure 2 ).
Abdomen. Abdomen brown with hypopygium black ( Figs 1A, 1D View Figure 1 ). Tergite nine small, straight at hind margin ( Fig. 2D View Figure 2 ). Gonocoxite elongated, broad basally and narrowed to apex, densely covered with long setae ( Figs 2D–E View Figure 2 ). Outer gonostylus being narrowed rod, inner gonostylus longer than outer, being broad lobe ( Figs 2D–E View Figure 2 ).
Etymology. This specific name is dedicated to Mrs. Chen Huamei for her contribution of this Dominican amber.
Key to fossil species of Brachypremna View in CoL .
1. Cross vein r-m present ................................................................................................................................................... B. gurnetensis
Cross vein r-m absent........................................................................................................................................................................... 2 2. Origin of Rs obliquely arcuated, petiole of cell m1 distinctly longer than cross vein m-m............................ B. chenhuameii sp. nov.
Origin of Rs right-angled in shape, petiole of cell m1 subequal in length to cross vein m-m ......................................... B. brodzinskii
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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