Camptoptera aveolobato Anwar & Zeya sp. nov. (Hymenoptera: Mymaridae) is described. Camptoptera concavaTaguchi, 1972 from the Philippines and C. jthuberiTriapitsyn, 2018 from Taiwan are recorded for the first time from India and redescribed. A modified couplet for the key to the Indian species of Camptoptera by Anwar et al. (2020) is provided.
Se describe Camptoptera aveolobato Anwar y Zeya sp. nov. (Hymenoptera: Mymaridae) y se redescriben y citan por primera vez en la India C. concavaTaguchi, 1972, de Filipinas, y C. jthuberiTriapitsyn, 2018, de Taiwán. Además, se incluye la nueva especie en la clave dicotómica de las especies indias de Camptoptera de Anwar et al. (2020).
MymaridaeCamptopterataxonomynew recordsnew speciesMymaridaeCamptopterataxonomíanuevas citasnueva especie
<bold>Introduction</bold>
Species of Camptoptera Foerster, 1856 are among the smallest members of the family Mymaridae (Hymenoptera: Chalcidoidea). They are more diverse than they appear but are usually collected in few numbers mostly as “singletons” that often results in poor descriptions if they are not carefully prepared so as many of their features as possible are clearly visible. Obviously, a single specimen can only be slide-mounted in either dorsal or lateral view, usually with head dissected so the face is visible, which means features on the side or top of the head or side of the body are not visible.
Taguchi (1971, 1972, 1977) described 11 Camptoptera species from the Philippines or Taiwan, both in the Oriental region and from Japan, normally included entirely in the Palaearctic region (the southern part is actually Oriental). Triapitsyn (2014) revised the Palaearctic species of Camptoptera and noted that the Taguchi collection is lost.
Triapitsyn (2017) provided taxonomic notes on species of Camptoptera described by Subba Rao (1989) from India. Triapitsyn (2018) described C. jthuberiTriapitsyn, 2018, a species similar to C. concavaTaguchi, 1972. Anwar et al. (2020) reviewed the genus from India and Sri Lanka, treated 26 species including 11 new species from India and provided a key to females.
Here, we record and redescribe Camptoptera concava and C. jthuberi from India for the first time since their original description from Bohol Islands, Philippines, and Taiwan respectively and, describe one new species from India. A modified couplet for the key of Anwar et al. (2020) is also provided to include the three species in the Anwar et al. (2020) key. For all three species, males and hosts are unknown.
<bold>Material and methods</bold>
The terms used largely follow Zeya & Hayat (1995) and Gibson (1997). Measurements of body length are taken from card-mounted specimens; all other measurements are from slide mounts made at 400× magnification, and converted to μm. Length of antennal scape excludes the radicle. Specimens were slide-mounted in Canada balsam following the method in Noyes (1982) and partly modified by Anwar et al. (2020). Photographs of slide mounted parts were taken with a digital camera attached to a compound microscope Leica DM 2500 and retouched using Adobe Photoshop®. All the determined and type materials were deposited at the Insect Collections Department of Zoology, Aligarh Muslim University, Aligarh, Uttar Pradesh, India.
The following abbreviations are used:
F = Funicle segment
mps = multiporous plate sensillum or sensilla (= longitudinal sensilla of authors)
MT = Malaise trap
The following acronyms are used for specimen depositories:
CNC = Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food Canada, Ottawa, ON, Canada.
ZDAMU = Insect Collections Department of Zoology, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
ZLMU = Entomological Laboratory, Faculty of Agriculture, Meijo University, Shiogamaguchi, Tempaku-ku, Nagoya, Japan
<bold>Results</bold>
<bold>Taxonomy</bold>
Key
A modified couplet 3 for the key of Anwar et al. (2020: 4) is provided here to fit the three additional species into the key to Indian species of Camptoptera, females. They fall within couplets 4 and 8 of Anwar et al. (2020) together with 5 previously included species which apparently all have a strongly ridged petiole: macheta, protuberculata, ambrae, tuberculata and scythe.
3(2) Petiole with strong transverse ridges ___ 4’
– Petiole with reticulate sculpture ___ 8
4’(3) Clava at least 5× as long as broad (Figs 1b, 3b, 5b); fore wing distinctly curved at apex, at least 15× as long as broad (Figs 2b, 4b, 6b) ___ 5’
– Clava at most 3× as long as broad (Anwar et al., 2020: figs 9, 27, 31, 35, 37); fore wing apex not curved as above, at most 12× as long as broad (Anwar et al., 2020: figs 12, 21) ___ 4
5’(4’) Prosternum truncated apically (Fig. 2c); clava 8× as long as broad, longer than F4–F7 combined ___
C. concavaTaguchi, 1972
– Prosternum pointed apically (Figs 4c, e, 6c); clava at most 6× as long as broad, subequal to F4–F7 combined ___ 6’
6’(5’) Scape dilated basally (Fig. 3b); frenum with faint reticulate sculpture ___
C. jthuberiTriapitsyn, 2018
– Scape distended (Fig. 5b); frenum with large polygonal celllike sculpture ___
C. aveolobato Anwar & Zeya sp. nov.
4(4’) Pedicel much longer than F1 (Anwar et al., 2020: figs 9, 27); fore wing disc setose, with 2–4 rows of setae (Figs 12, 28) ___ 5
– Pedicel at most slightly longer than F1 (Anwar et al., 2020: figs 31, 35, 37); fore wing disc largely bare except a few setae in two incomplete rows (Anwar et al., 2020: figs 30, 36, 40) ___ 6
Camptoptera concavaTaguchi, 1972
Figs 1–2
<italic>Camptoptera concava</italic> Taguchi ♀. a. Habitus. b. Antenna. c. Head, frontal view.
Fig. 1.— Camptoptera concava Taguchi ♀. a. Habitus. b. Antena. c. Cabeza, vista frontal.
<italic>Camptoptera concava</italic> Taguchi ♀. a. Mesosoma with gaster and petiole. b. Wings. c. Prosternum. d. Mesosoma enlarged.
Fig. 2.— Camptoptera concava Taguchi ♀. a. Mesosoma con gáster y pecíolo. b. Alas. c. Prosternum. d. Mesosoma aumentado.
Camptoptera concavaTaguchi, 1972: 225, ♀. Holotype female (ZLMU), Philippines, Bohol, Bilar, not examined; it is lost according to Triapitsyn (2014).
Material examined. INDIA: KARANATAKA: Bengaluru, Jarakabande Kaval, 16.i.2015 (MT), Coll. K. Veenakumari; 1 ♀ on slide under 4 coverslips (slide No. MYM.670, ZDAMU).
Diagnosis. Camptoptera concava is readily recognized by the anteriorly truncated prosternum and fore wing disc without discal cilia except for one in apical third. Here, we report it for the first time since the original description from the Philippines but from Karnataka, India over 5000 km away. Our specimen matches exactly Taguchi’s description and illustrations of C. concava so, we are confident that it is conspecific.
Redescription (specimen from India)
Female
Length, 400 µm. Head and body dark brown. Antenna with radicle, scape, pedicel, F1 and F2 yellowish rest pale brown. Wings subhyaline. Legs, including coxae, yellowish brown.
Head (Fig. 1c). Head, in frontal view, 1.4× as broad as high, with faint polygonal reticulate sculpture; antennal torulus just above the mid eye level; torulus separated from transverse trabecula by 1× height of torulus; occiput with oblique reticulate sculpture. Antenna (Fig. 1b) with scape 5× as long as broad; pedicel 1.5× as long as broad; clava 8× as long as broad, longer than F4–F7 combined, with 4 mps.
Mesosoma (Figs. 2a, d). Prosternum truncated apically (Fig. 2c). Mesoscutum with transverse reticulate sculpture; axilla with polygonal reticulate sculpture; scutellum and frenum with faint reticulate sculpture (Fig. 2d); propodeum with submedian carinae, not extending to metanotum (Fig. 2d). Fore wing distinctly curved at apex and narrower, 19× as long as broad, disc almost bare except for one seta in apical third; longest marginal seta 6× as long as maximum wing width (Fig. 2b). Hind wing 38× as long as broad; longest marginal seta 11× as long as maximum wing width (Fig. 2b). All the coxae reticulate.
Metasoma (Fig. 2a). Petiole broader than long, strongly ridged and without lateral lamellae; ovipositor 0.6× mesotibia and 0.7× metatibia length.
Distribution. India (new record): Karnataka. Philippines.
Camptoptera jthuberiTriapitsyn, 2018
Figs 3–4
<italic>Camptoptera jthuberi</italic> Triapitsyn ♀. a. Habitus. b. Antenna. c. Head, frontal view.
Fig. 3.— Camptoptera jthuberi Triapitsyn ♀. a. Habitus. b. Antena. c. Cabeza, vista frontal.
<italic>Camptoptera jthuberi</italic> Triapitsyn ♀. a. Mesosoma with gaster and petiole. b. Wings. c. Prosternum. d. Mesosoma enlarged. e. Prosternum, holotype.
Fig. 4.— Camptoptera jthuberi Triapitsyn ♀. a. Mesosoma con gaster y pecíolo. b. Alas. c. Prosternum. d. Mesosoma aumentado. e. Prosternum, holotipo.
Material examined. INDIA: SIKKIM: Tadong, ICAR Comp., 3.xi.2014 (MT), Coll. K. Veenakumari; 1 ♀ on slide under 4 coverslips (slide No. MYM.671, ZDAMU).
Diagnosis. The following features taken together distinguish the species from others in the genus. Antenna with scape dilated basally; fore wing with a complete row of setae in the middle. Ovipositor, 0.6× mesotibia and 0.5× metatibia length.
The redescription of the species is based on a female collected in India agrees fairly well with most of the features of the original description and illustrations of C. jthuberi. The features of the redescribed species and C. jthuberi are as follows (the features of C. jthuberi are taken from the original description and are in parentheses): body length, 480 µm (body length, 445–595 µm); scape minus radicle 5× as long as broad (scape minus radicle 5.5–7.1× as long as broad); fore wing 16× as long as broad, with longest marginal seta 5× as long as maximum wing width (fore wing 13.8–16.7× as long as broad, with longest marginal seta 3.9–4.8× as long as maximum wing width); clava 6× as long as broad, subequal to F4–F7 combined, with 4 mps (clava 5.0–5.5× as long as broad, a little longer than F5–F7 combined, with 4 mps); ovipositor 0.5× metatibia (ovipositor 0.5– 0.6× metatibia). On the basis of the above features we have no hesitation in considering it to be conspecific. However, the length of funicle segments are shorter and that of clava is a little longer but we consider this to be intraspecific variation.
Redescription (specimens from India)
Female
Length, 480 µm. Head and body brown. Antenna pale brown. Wings subhyaline. Legs pale brown.
Head (Fig. 3c). Head, in frontal view, 1.3× as broad as high, with faint polygonal reticulate sculpture; antennal torulus above the mid eye level; torulus separated from transverse trabecula by 1× height of torulus; occiput with oblique reticulations. Antenna (Fig. 3b) with scape, dilated distally, 5× as long as broad; pedicel 1.6× as long as broad; clava 6× as long as broad, subequal to F4–F7 combined, with 4 mps.
Mesosoma (Figs. 4a, d). Prosternum pointed apically (Fig. 4c, e). Mesoscutum with transverse reticulations; axilla with polygonal reticulate sculpture; scutellum and frenum with faint reticulate sculpture; propodeum with submedian carinae, not extending to metanotum (Fig. 4d). Fore wing distinctly curved at apex and narrower, 16× as long as broad, disc with a complete row setae in middle; longest marginal seta 5× as long as maximum wing width (Fig. 4b). Hind wing 29× as long as broad; longest marginal seta 9× as long as maximum wing width (Fig. 4b). All the coxae reticulate.
Metasoma (Fig. 4a). Petiole as long broad, strongly ridged and without lateral lamellae; ovipositor, 0.6× mesotibia and 0.5× metatibia length.
<italic>Camptoptera aveolobato</italic> sp. nov. ♀ Holotype. a. Habitus. b. Antenna. c. Head, frontal view.
Fig. 5.— Camptoptera aveolobato sp. nov. ♀ Holotipo. a. Habitus. b. Antena. c. Cabeza, vista frontal.
<italic>Camptoptera aveolobato</italic> sp. nov. ♀ Holotype. a. Mesosoma with gaster and petiole. b. Wings. c. Prosternum. d. mesosoma enlarged.
Fig. 6.— Camptoptera aveolobato sp. nov. ♀ Holotipo. a. Mesosoma con gaster y pecíolo. b. Alas. c. Prosternum. d. mesosoma engrandecida.
Type material. Holotype ♀: INDIA: ANDAMAN & NICOBAR ISLANDS: South Andaman Forest, Garacharma, 31.i.2013 (MT), Coll. K. Veenakumari (ZDAMU, on slide under 4 coverslips, slide No. MYM.174).
Diagnosis. The following features together distinguish this species. Prosternum pointed anteriorly; frenum with large polygonal reticulate sculpture. Fore wing with a row of seven setae scattered in the middle. Ovipositor extends distinctly beyond apex of gaster, 0.9× mesotibia and 0.8× metatibia length.
Camptoptera aveolobato comes close to C. jthuberi in having similar shape of prosternum and petiole, but differs by having distended scape and large polygonal cell-like sculpture on frenum.
Description
Female
Length, 320 µm. Head and body brown. Antenna yellowish brown. Wings subhyaline. Legs, including coxae, yellowish brown.
Head (Fig. 5c). Head, in frontal view, 1.3× as broad as high, with polygonal reticulate sculpture; antennal torulus below mid eye level; torulus separated from transverse trabecula by 2× height of torulus; occiput with oblique reticulations. Antenna with scape 4× as long as broad; pedicel 1.5× as long as broad; clava very long and slender, 5× as long as broad, subequal to F4-F7 combined, with 4 mps (Fig. 5b).
Mesosoma (Figs. 6a, d). Prosternum pointed anteriorly (Fig. 6c). Mesoscutum with transverse reticulations; axilla with polygonal reticulate sculpture; scutellum with faint reticulate sculpture; frenum with large polygonal reticulate sculpture (Fig. 6d); propodeum with submedian carinae, not extending to metanotum (Fig. 6d). Fore wing distinctly curved at apex and narrower, 16× as long as broad, disc with a row of seven scattered setae in middle; longest marginal seta 6× as long as maximum wing width (Fig. 6b). Hind wing 28× as long as broad; longest marginal seta 9× as long as maximum wing width (Fig. 6b). All the coxae reticulate.
Metasoma (Fig. 6a). Petiole broader than long, strongly ridged and without lateral lamellae; ovipositor protruded at apex of gaster, 0.9× mesotibia and 0.8× metatibia length.
Etymology. The species name is an arbitrary combination of letters, and is treated as noun in apposition.
<bold>Acknowledgments</bold>
We express our sincere gratitude to Dr. Mohammad Hayat, (ZDAMU) for suggestions and criticism. We also thank Dr. John T. Huber, Natural Resources Canada, c/o Canadian National Collection of Insects, Ottawa, Ontario, Canada, for critically reviewing the paper. Drs J.T. Huber and Serguei V. Triapitsyn, Entomology Research Museum, Department of Entomology, University of California, Riverside, USA, are highly acknowledged for sending photograph of the prosternum of C. jthuberi for comparison with our specimen from India. We very grateful to Dr. K. Veenakumari, NBAIR, Bengaluru, for donating the specimens collected by her for the study. Prince T. Anwar gratefully acknowledges the Council of Scientific and Industrial Research (CSIR), New Delhi, India for providing financial assistance in the form of Research Associateship.
Disclosure statement
No potential conflict of interest was reported by the authors.
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