Neoperla mnong Stark 1987
Creators: name: Stark, Bill P.
name: Sivec, Ignac
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Neoperla
Neoperla mnong

description: <i>Neoperla mnong</i> Stark (Figs. 40&amp;hyphen;44, 106) <i>Javanita costalis</i> Navás, 1932:925. Secondary homonym of <i>Formosina costalis</i> Klapálek (Zwick 1988) <i>Neoperla mnong</i> Stark, 1987:48. Holotype &amp;male; (California Academy of Sciences). Di Linh, Vietnam <i>Neoperla angustilobata</i> Zwick, 1988:404. Holotype &amp;female; (Muséum National d’Histoire Naturelle), New Synonymy <b>Material examined.</b> Vietnam: Gia Lai, An Khe District, Tram Lap, Azun River, 2 km NW on trail from forestry building, 14 <b>°</b> 27’ N, 108 <b>°</b> 33’E, 17 June 1996, D. Currie, J. Swann, ROM 961056, 4 &amp;male;, 1 &amp;female; (ROM, BPS). Same site, 23 June 1996, D. Currie, J. Swann, ROM 961084, 1 &amp;male; (IEBR). Gia Lai, An Khe District, Tram Lap, Azun River, 3 km NE on trail from forestry building, 21 June 1996, D. Currie, J. Swann, ROM 961076, 1 &amp;male; (ROM). Gia Lai, An Khe District, Dacklest River, 5.2 km NE Tram Lap on forest road, 14 <b>°</b> 24’ N, 108 <b>°</b> 33’ E, 15 June 1996, D. Currie, J. Swann, ROM 961047, 4 &amp;male; (ROM). Gia Lai, An Khe District, Tram Lap, near pond and coffee plantation, 14 June 1996, UV light, 14 <b>°</b> 26’ N, 108 <b>°</b> 33’ E, B. Hubley, D. Currie, J. Swann, ROM 961045, 2 &amp;male; (ROM). Gia Lai, An Khe District, 6.5 km NE Tram Lap, forest road, 19 June 1996, D. Currie, J. Swann, ROM 961061, 1 &amp;female; (ROM). Nghe An, ca. 25 km SW Con Cuong, Khe Moi Forestry Camp, tributary Khe Moi River, 4 June 1995, B. Hubley, J. Swann, ROM 956158, 1 &amp;female; (ROM). <b>Remarks.</b> This species was first described as <i>Javanita costalis</i>, by Navás (1932) from a female specimen and later described as a new species from a male specimen by Stark (1987). Zwick (1988) recognized <i>J. costalis</i> as a secondary homonym of <i>Formosina costalis</i> Klapálek after both species were transferred to <i>Neoperla</i> (Sivec &amp; Zwick 1987), and proposed <i>N. angustilobata</i> as a replacement for <i>N. costalis</i>, <i>sensu</i> Navás. The conspecificity of <i>N. mnong</i> and <i>N. angustilobata</i> was suggested when <i>N. mnong</i> females were associated in this study. <b>Adult habitus.</b> Biocellate. Head mostly yellow but small area of brown pigment over ocelli often with distinct anteromesal notch; frons usually marked with an additional dark area near anterior margin (Fig. 40). Pronotum pale brown with slightly darker rugosities. Wings pale, veins amber. Femora and tibiae pale but a little darker at the knee. <b>Male.</b> Forewing length 12&amp;hyphen;13 mm. Described by Stark (1987) but illustrations of the aedeagus and external genitalia are presented in Figs. 41&amp;hyphen;42 to aid in recognition of this species. <b>Female.</b> Forewing length 15&amp;hyphen;16 mm. Subgenital plate produced as a small notched tab; notch U&amp;hyphen; shaped and about as wide as lateral lobes of plate (Fig. 43). Vagina longer than wide and swollen in posterior half (Fig. 44). Spermathecal stalk short; spermatheca slender, curled, hooked on apex and without internal spinous lining. <b>Egg.</b> Pear shaped. Length ca. 0.33 mm, width ca. 0.23 mm. Collar wide and not distinctly stalked; sides with vertical ribs extending onto egg body, and with an irregular cell row; rim not flanged (Fig. 106). Chorion appearing relatively smooth but covered throughout with minute, shallow pits. <b>Diagnosis.</b> This species is a member of a complex which includes <i>N. diehli</i> Sivec, a species known from Sumatra (Zwick &amp; Sivec 1985), <i>N. yao</i> Stark, a species which also occurs at sites in Gia Lai Province, <i>N. han</i> Stark, a species described from Hong Kong (Stark 1987), and <i>N. hubleyi</i>, described above from several Vietnamese sites. The aedeagal Y&amp;hyphen; lobes for <i>N. diehli</i>, <i>N. mnong</i>, <i>N. han</i> and <i>N. hubleyi</i> are similar in having short arms supporting spiny apices, but those of <i>N. han</i> and <i>N. hubleyi</i> have a longer basal stalk, and those of <i>N. diehli</i> are more basally located and less spherical than in <i>N. mnong</i>. Females of <i>N. mnong</i> and <i>N. yao</i> have similar, bilobed subgenital plates and color patterns, but differ in egg collar morphology. The eggs of the latter species have stalked collars whereas those of <i>N. mnong</i> are unstalked.
description: Published as part of <i>Stark, Bill P. &amp; Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, pp. 19-54 in Illiesia 4 (3)</i> on pages 33-34, DOI: 10.5281/zenodo.4758856
description: {"references": ["Navas, L. 1932. Insecta orientalis. Memorie della Pontificia Accademia Romana dei Nuovi Lincei, 16: 917 - 918, 923 - 926, 952 - 954.", "Zwick, P. 1988. Species of Neoperla from the south- east Asian mainland (Plecoptera: Perlidae). Entomologica Scandinavica, 18: 393 - 407.", "Stark, B. P. 1987. Records and descriptions of Oriental Neoperlini (Plecoptera: Perlidae). Aquatic Insects, 9: 45 - 50.", "Sivec, I. &amp; P. Zwick. 1987. Some Neoperla from Taiwan (Plecoptera: Perlidae). Beitrage zur Entomologie, 37: 391 - 405.", "Zwick, P. &amp; I. Sivec. 1985. Supplements to the Perlidae (Plecoptera) of Sumatra. Spixiana, 8: 123 - 133."]}