Peracca (Robustacca) nigrifrons, Ingrisch, 2020
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publication ID |
https://dx.doi.org/10.3897/evolsyst.4.60525 |
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publication LSID |
lsid:zoobank.org:pub:8BD62DBF-438C-4650-8C40-37C837FD573F |
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persistent identifier |
https://treatment.plazi.org/id/E51CCE50-14CE-4B62-B853-678950A642CE |
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taxon LSID |
lsid:zoobank.org:act:E51CCE50-14CE-4B62-B853-678950A642CE |
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treatment provided by |
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scientific name |
Peracca (Robustacca) nigrifrons |
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sp. nov. |
Peracca (Robustacca) nigrifrons sp. nov. Figs 2 View Figure 2 , 3 View Figure 3
Holotype
(female). Indonesia: Sumatra, Riau, Indragiri, Somgei Lalah [Sungai Lala, about 0°24'S, 102°12'E] 1.i.1900-26.viii.1901, leg. W. Burchard - depository: ZMH (HTodosumF01; collection ID: ZMH64336).
Etymology.
The name of the new species refers to its black face; from Latin niger, nigro black and frons face.
Diagnosis.
The new species differs from the type species, P. (R.) robustus by the black color of the face instead of agreeing with general coloration (Fig. 2A View Figure 2 ), by the longer and conical process on top of fastigium verticis (Fig. 2C View Figure 2 ) instead of a shorter, subcylindrical process in P. (R.) robustus (Fig. 2C, I View Figure 2 ), and by the female subgenital plate that has a bilobate end (Fig. 3E View Figure 3 ) instead of a subtruncate apical margin (Fig. 2F View Figure 2 ).
Description.
Fastigium verticis subcylindrical, slightly surpassing scapus, apical area conical, apex obtuse; dorsal surface with a large cone at base; lateral ocelli projecting; in frontal view roundly swollen at base (Fig. 2B, C View Figure 2 ). Pronotum rather short and broad; transverse sulcus not interrupted in middle; a second, Y-shaped sulcus on paranota, and some longitudinal furrows in middle of disc; ventral margin descending backwards, in anterior area with a small spine (Fig. 3H View Figure 3 ). Tegmen surpassing hind knees but not reaching tip of ovipositor (Fig. 3B View Figure 3 ). Prosternal spines long, subacute; mesosternal lobes cylindrical; metasternal lobes short cylindrical (Fig. 3D, I View Figure 3 ). Mesofemur and mesotibia slightly compressed. All femora with spines on both ventral margins; on fore and mid femora spines on anterior margin longer than on posterior margin. Knee lobes of profemur obtuse on external side, of mesofemur triangular on external side; hind knee lobes uni-spinose on both sides.
Male. Unknown.
Female. Tenth abdominal tergite transverse; angularly excised from apex for almost half of its length (Fig. 3F View Figure 3 ). Epiproct triangular. Cerci conical, little curved in dried specimen, with a long, narrow apical area (Fig. 3F View Figure 3 ). Subgenital plate largely hidden under preceding sternite in preparation, terminating into a pair of rounded apical lobes (Fig. 3E View Figure 3 ). Ovipositor with both margins curved, apex sub-obtuse (Fig. 3B, J View Figure 3 ). Tegmen in middle of anal field with an area of veinlets carrying small pegs ending up in a hair.
Coloration.
Light brown [discolored due to previous conservation in alcohol]. Frons black; mouthparts yellowish to reddish brown; apex of mandibles black. Tegmen with medium brown cells and yellow brown veins and veinlets (pattern little distinct); areas around subcosta and radius and before anal vein of uniform light color; in dorsal area some scattered cells darker than most others.
Measurements of female.
Body w/o wings: 33; pronotum: 9.8; tegmen: 30; hind femur: 19; ovipositor: 19.5 mm.
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.