Review Article |
Corresponding author: James M. Carpenter ( carpente@amnh.org ) Academic editor: Andreas Köhler
© 2019 Ting-Jing Li, James M. Carpenter.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Li T-J, Carpenter JM (2019) Descriptions of three new species of the genus Stenodyneriellus Giordani Soika with keys to some related species (Hymenoptera, Vespidae, Eumeninae). ZooKeys 820: 71-81. https://doi.org/10.3897/zookeys.820.32167
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Three new species, namely Stenodyneriellus angustus sp. n. from Thailand, S. profundus sp. n. from Philippines, and S. longitergus sp. n. from Indonesia, are described and illustrated in detail. Stenodyneriellus maculatus Gusenleitner, 2013 is newly recorded from Vietnam. Two keys to some related species are also provided.
Eumeninae , Hymenoptera , new species, Stenodyneriellus
To date, there are 64 species and five subspecies recorded in the genus Stenodyneriellus Giordani Soika, 1962 from the Oriental and Australian regions (
The specimens examined are deposited in American Museum of Natural History, New York (
Holotype, ♀, Thailand: Chiang Mai Doi Inthanon NP Vachiratharn Fls, 18°32.311'N, 98°36.0481'E, 700 m, Malaise trap, 16–24.VIII.2006, Y Areeluck leg., T182, deposited in QSBG.
Female (Fig.
Head. Clypeus slightly convex, coriaceous, sparsely punctate, as wide as long, apex almost truncated (Fig.
Mesosoma. Pronotal carina complete, rounded dorsally and emarginated laterally; anterior surface of pronotum smooth; dorsal surface of pronotum, mesoscutum, mesepisternum, mesoscutellum, metanotum, and both dorsal and lateral surfaces of propodeum coarsely and densely punctate, punctures on mesepisternum, metanotum, and both dorsal and lateral surfaces of propodeum relatively denser and shallower, their interspaces distinctly carinate, reticulate, and similar to those of frons; mesoscutum evenly convex; mesoscutellum flat; metanotum slightly sloping; dorsal surface of propodeum almost in the same horizontal plane as metanotum, without distinct teeth behind metanotum, without superior carina; posterior surface widely and deeply depressed, forming a central cavity (Fig.
Metasoma. In dorsal view, T1 domed, its width 1.91× length and 0.82× width of T2, basally without a transverse carina, anterior surface coriaceous, impunctate, and almost vertical, dorsal surface with very sparse punctures; T2 apically with a narrow, translucent and blade-shaped lamella (Fig.
This species is similar to S. sublamellatus Giordani Soika, 1994, from Malaysia by the character of T2 with a narrow, translucent, blade-shaped lamella apically (Fig.
Thailand.
The specific name is the Latin adjective angustus (= narrow), which refers to T2 with a narrow, translucent and blade-shaped lamella apically.
Holotype, ♂, Philippines, ca. 4 miles E of Marikina, Rizal Prov. Luzon, 19.IX.1945, RP Dow leg., deposited in
Male (Fig.
Head. Clypeus (Fig.
Mesosoma. Pronotal carina complete, rounded dorsally and emarginated laterally; anterior surface of pronotum wholly coriaceous and impunctate; dorsal surface of pronotum moderately punctate medially and densely punctate laterally and apically; mesoscutum, mesepisternum, mesoscutellum, metanotum sparsely to moderately punctate, similar to those of vertex and gena, punctures of mesoscutellum slightly sparser than those of other above parts; mesoscutum slightly convex; both mesoscutellum and metanotum flat; dorsal surface of propodeum punctate, punctures shallow, flat bottomed and interspaces slightly carinate, in the same horizontal plane as metanotum, with two small and translucent teeth behind metanotum, without superior carina; posterior surface smooth, with medial longitudinal carina, widely and deeply depressed forming a central cavity (Fig.
Metasoma. In dorsal view, T1 domed, its width 1.78× length and 0.80× width of T2, basally without a transverse carina, anterior surface vertical, smooth, and separated from dorsal surface, dorsal surface coriaceous and with very sparse, tiny punctures; T2 without a translucent and blade-shaped lamella apically, punctures on T2 and other terga similar to those of T1; S2 widely depressed basally, punctures of sterna similar to those of terga; apical yellow bands on T1–T4 wider medially, with small gaps medially, apical band of T6 interrupted laterally, and all apical yellow bands of sterna with U-shaped gaps medially.
This species is similar to S. flaviventris Giordani Soika, 1994, from the Philippines and S. octolineatus Giordani Soika, 1994, from Singapore in sharing with the character: clypeus approximately as wide as long, or a little wider than long, very convex, broadly and deeply emarginated into an arc of a circle, forming two long and sharp apical teeth which delimit a wide and entirely concave median area (Figs
Philippines.
The specific name is the Latin adjective profundus (= deep, vast) referring to the deep emargination of the clypeus.
1 | Posterior surface of propodeum narrowly and shallowly depressed, not forming a central cavity and not well-separated from dorsal surface (Fig. |
S. flaviventris Giordani Soika, 1994 |
– | Posterior surface of propodeum widely and deeply depressed forming a central cavity, and well-separated from dorsal surface (Figs |
2 |
2 | Clypeus (Fig. |
S. octolineatus Giordani Soika, 1994 |
– | Clypeus (Fig. |
S. profundus sp. n. |
Holotype, ♀, Indonesia, Latimodjong Mts Bontce Batoe Dist, 18–25.V.1931, 4000 m a.s.l., leg.
Female (Fig.
Head. Clypeus (Fig.
Mesosoma. Pronotal carina complete, waved dorsally and slightly emarginated laterally; anterior surface of pronotum smooth; dorsal surface of pronotum densely punctate, interspaces between punctures carinate, punctures on mesoscutum, mesoscutellum, mesepisternum and metanotum similar to or slightly sparser than those of pronotum; mesoscutum convex; mesoscutellum flat; metanotum slightly sloping apically; dorsal surface of propodeum thickly punctate, punctures shallow, flat bottomed and interspaces distinctly carinate and reticulate, in the same horizontal plane as metanotum, without teeth behind metanotum, with superior carina; posterior surface widely and deeply depressed forming a central cavity (Fig.
Metasoma. In dorsal view, T1 (Fig.
This species is similar to three Philippine species (S. nitidus Giordani Soika, S. plurinotatus Giordani Soika, and S. rufinodus Giordani Soika) in sharing the elongate character of T1: it is approximately as long as wide at the apex, and much narrower than T2. It differs from these three related species as shown in the following key.
Indonesia.
The specific name longitergus is derived from two Latin words, long and tergus, which refers to T1 being elongate, approximately as long as wide apically.
1 | Dorsal surface of propodeum largely flat, with a few sparse punctures | S. nitidus Giordani Soika, 1994 |
– | Dorsal surface of propodeum almost regularly convex, densely punctate (Fig. |
2 |
2 | Both clypeus and T1 sparsely punctate | S. plurinotatus Giordani Soika, 1995 |
– | Both clypeus and T1 densely punctate (Figs |
3 |
3 | Posterior surface of propodeum with a small, shallow central depression and not clearly separated from dorsal one; punctures of T1 similar to those of dorsal surface of propodeum; clypeal apex as wide as interantennal space | S. rufinodus Giordani Soika, 1994 |
– | Posterior surface of propodeum with large central depression and clearly separated from dorsal one (Fig. |
S. longitergus sp. n. |
Stenodyneriellus maculates Gusenleitner, 2013: 121–132.
1♀2♂♂, S. Vietnam: Ca Mau Prov., Song Trem, ThoiBinh Distr, 200 km SW Ho Chi Minh City, 18.V.2002, leg. NQ Tan & NV Binh.
Clypeus in female basally with a yellow transverse band and apically with two yellow spots, in male wholly yellow; anterior surface of T1 and legs without red marks; clypeus slightly wider than long, apex truncated and narrower than interantennal space; frons, vertex and gena coarsely, deeply and densely punctate; A13 of male hooked, narrow, conical and just reaching backward the base of A12; posterior surface of propodeum smooth, widely and deeply depressed forming a central cavity, well-separated from dorsal surface; T2 without a translucent and blade-shaped lamella apically, T2–T5 clearly punctured.
Vietnam (new record); Thailand.
This study was funded by the National Natural Science Foundation of China (Nos: 31772490, 31372247, 31000976), Young Talent Incubation Programme of Chongqing Normal University (14CSDG07).