Research Article |
Corresponding author: Ge-Xia Qiao ( qiaogx@ioz.ac.cn ) Academic editor: Roger Blackman
© 2016 Li-Yun Jiang, Jing Chen, Ge-Xia Qiao.
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:
Jiang L-Y, Chen J, Qiao G-X (2016) Yamatochaitophorus yichunensis, a new species of aphid (Aphididae: Chaitophorinae) from northeast China. ZooKeys 612: 41-49. https://doi.org/10.3897/zookeys.612.7873
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Yamatochaitophorus yichunensis sp. n. is described from specimens collected in northeast China on Acer tegmentosum (Aceraceae). Yamatochaitophorus is also a new generic record for China. Type specimens are deposited in the National Zoological Museum of China, Institute of Zoology, Chinese Academy of Sciences, Beijing, China (NZMC) and the Natural History Museum, London, UK (BMNH).
Aphididae , Chaitophorinae , China, new record, new species, Yamatochaitophorus
The genus Yamatochaitophorus was erected by
In the Chaitophorinae, three genera are associated with the plant family Aceraceae; Periphyllus van der Hoeven, Trichaitophorus Takahashi and Yamatochaitophorus Higuchi. Yamatochaitophorus is closely related to Trichaitophorus, also distributed in Eastern Asia (China, Japan and India), but can be distinguished from Trichaitophorus by the larger number of marginal setae and fewer eye facets, as well as by the shape and length of the dorsal setae (
Reliable aphid taxonomy requires slide-mounted specimens that are undistorted, but with the body contents fully cleared to make it possible to see surface details clearly. Specimens were placed in a 10% solution of potassium hydroxide and heated for 10–20 minutes or until body contents have softened. They were taken successively through distilled water, 70% EtOH and 95% EtOH, then transferred to clove oil for a minimum of 5 minutes, and finally mounted in Canada balsam. The descriptions and drawings provided here were produced from slide-mounted specimens using a Leica DM4000B and drawing tube. The photomicrograph images were prepared with a Leica DM2500 using DIC illumination, and processed with Automontage and Photoshop software.
Specimens of Yamatochaitophorus albus from Japan and India were obtained on loan from the Natural History Museum, London, UK, (BMNH) for comparison with our material.
Aphid terminology in this paper generally follows that of
Yamatochaitophorus
Higuchi:
Trichaitophorus albus Takahashi, 1961; by original designation.
Apterae: Head fused with pronotum. Eyes with approx. 25 facets or less. Antenna 5-segmented, occasionally 6-segmented, shorter than body. Antennal segments without secondary rhinaria. Ultimate rostral segment with 0–2 accessory setae. Dorsal body covered with O- or C-like tubercles, and dorsal setae of body long, thick, flattened with knobbed or blunt apices; ventral body with spinulose stripes. First tarsal segments with three setae. Abdominal tergites I-VII solidly fused, each with paired spinal and marginal setae. Siphunculi short, truncate, without reticulations. Cauda rounded, anal plate broadly rounded, genital plate transverse elliptical. In alatae (
Trichaitophorus albus Takahashi, 1961: 8.
1 apterous viviparous female, Japan: Suganuma (Tumma Pref.), 22 July 1967, on Acer sp., coll. H. Higuchi, leg. H. Higuchi (BMNH); 1 apterous viviparous female, India: Bhuinder (U.P.), 30 May 1980, on Acer acuminatum, coll. S. Saha, leg. S. Chakrabarti (BMNH) (Morphometric data of the specimen is in the table1).
Japan, India, Siberia.
Acer acuminatum, A. mono, A. ukurunduense, A. villosum and Acer sp.
Holotype: apterous viviparous female, China: Heilongjiang Province, Yichun City (Tangwanghe National Forest Garden, E 129.54°, N48.45°, Alt. 360 m), 21 July 2015, No. 35896-1-1-1, on Acer tegmentosum, coll. G.X. Qiao.
Paratypes: 8 apterous viviparous females, with the same collection data as holotype (NZMC); 2 apterous viviparous females, with the same collection data as holotype (BMNH).
The specific name yichunensis is based on the type locality of the species.
Body small, elongate oval, adults pale yellow in life. Dorsal body covered with O- or C-like tubercles. Antenna 5-segmented, half as long as body or shorter, with processus terminalis longer than the base of last segment. Ultimate rostral segment with 1 or 2 accessory setae. Embryo with long, thick and acute spinal setae similar to marginal setae.
Apterous viviparous female: Body elongate oval, pale yellow in life (Figs
Yamatochaitophorus yichunensis sp. n. Apterous viviparous female: 1 dorsal view of head 2 antennal segments I–V 3 ultimate rostral segment 4 cephalic seta 5 marginal seta on abdominal tergite I 6 spinal setae and tubercles on abdominal tergite I in right, setal tubercles at base shown 7 tubercles on pleuro-marginal area on abdominal tergite IV 8 dorsal view of pronotum in right, dorsal setae, setal tubercles at base and tubercles shown 9 dorsal view of mesonotum in right, dorsal setae, setal tubercles at base and tubercles shown 10 siphunculi 11 cauda 12 anal plate 13 genital plate 14 embryo, dorsal setae shown.
Yamatochaitophorus yichunensis sp. n. Apterous viviparous female: 15 dorsal view of body 16 dorsal view of head, dorsal setae shown 17 cephalic seta 18 antenna 19 ultimate rostral segment 20 C- or O-like tubercles on abdominal tergites, 21 marginal setae on abdominal tergites III–IV 22 marginal setae on meso- and metanotum 23 siphunculus 24 cauda 25 anal plate 26 cauda and anal plate, mosaic-like ornamentation on distal ventral area of anal plate shown 27 genital plate. Scale bars: 0.10 mm.
Morphometric data for apterous viviparous females of Yamatochaitophorus yichunensis sp. n. (n = 11, with means in brackets) and Y. albus (Takahashi) (reliable morphometric data was only obtainable from one specimen, from India), the measurement is in mm.
Yamatochaitophorus yichunensis sp. n. | Yamatochaitophorus albus (Takahashi) | |
---|---|---|
Characters | Apterous viviparous females (n=11) |
Apterous viviparous female (n=1) |
Body length | 0.800–1.360 (0.928) | 1.300 |
Body width | 0.310–0.590 (0.391) | 0.620 |
Antenna | 0.328–0.602 (0.396) | 0.505 |
Antennal segment I | 0.035–0.050 (0.040) | 0.055 |
Antennal segment II | 0.029–0.038 (0.032) | 0.030 |
Antennal segment III | 0.090–0.224 (0.127) | 0.104 |
Antennal segment IV | 0.050–0.095 (0.060) | 0.060 |
Antennal segment V | – | 0.090 |
Base of antennal segment V (VI) | 0.055–0.075 (0.065) | 0.075 |
Processus terminalis | 0.085–0.119 (0.080) | 0.092 |
Ultimate rostral segment | 0.055–0.085 (0.065) | 0.080 |
Hind femur | 0.124–0.224 (0.156) | 0.214 |
Hind tibia | 0.214–0.383 (0.268) | 0.348 |
Second hind tarsal segment | 0.075–0.100 (0.084) | 0.100 |
Siphunculus | 0.015–0.050 (0.026) | 0.050 |
Basal width of siphunculus | 0.020–0.040 (0.029) | 0.065 |
Distal width of siphunculus | 0.015–0.040 (0.026) | 0.045 |
Cauda | 0.040–0.050 (0.045) | 0.055 |
Basal width of cauda | 0.060–0.090 (0.081) | 0.095 |
Basal diameter of antennal segment III | 0.015–0.025 (0.019) | 0.020 |
Width of hind tibia at mid length | 0.020–0.025 (0.023) | 0.035 |
Longest dorsal cephalic seta | 0.070–0.095 (0.077) | 0.109 |
Longest marginal seta on abdominal tergite I | 0.159–0.199 (0.170) | 0.184 |
Longest seta on abdominal tergite VIII | 0.104–0.124 (0.111) | 0.174 |
Longest seta on antennal segment III | 0.003–0.005 (0.004) | 0.005 |
Longest seta on hind tibia | 0.020–0.040 (0.028) | 0.070 |
Head. Frons convex, antennal tubercles poorly developed (Figs
Thorax (Fig.
Abdomen. Abdominal tergites I-VII each with one pair of spinal and one pair of marginal long thick setae with flattened or expanded apices (the expanded part is membranous) (Figs
Embryo (Fig.
Acer tegmentosum (Aceraceae). The species infested the underside of leaves of the host plant, and population density was low, with less than 20 individuals dispersed on the underside of a leaf (Figs
1 | Abdominal tergites I-VII each with 3–10 spino-pleural (one occasionally), and 1–5 pairs of marginal shorter setae with flattened apices, besides 1 pair of spinal and 1 pair of marginal long and thick setae; ultimate rostral segment with 1 or 2 accessory setae; in embryos, dorsal body with long, thick and acute spinal setae, similar to marginal setae in shape | Y. yichunensis sp. n. |
– | Abdominal tergites I-VII each with 1 or 2 spino-pleural and 2 marginal shorter setae with flattened apices, besides 1 pair of spinal and 1 pair of marginal long and thick setae; ultimate rostral segment without accessory setae; in embryos, the marginal setae are long, thick and acute, but the spinal setae are very short or indiscernible | Y. albus (Takahashi) |
The authors are grateful to F.D. Yang for making the slide mounts; to Paul Brown for arranging the loan of specimens of Y. albus. This work was supported by the National Natural Sciences Foundation of China (No. 31430078), the External Cooperation Program of BIC, Chinese Academy of Sciences (No. 152111KYSB20130012), and National Science Fund for Fostering Talents in Basic Research (No. J1210002).