Research Article |
Corresponding author: Ge-Xia Qiao ( qiaogx@ioz.ac.cn ) Academic editor: Roger Blackman
© 2016 Jing Chen, Li-Yun Jiang, 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:
Chen J, Jiang L-Y, Qiao G-X (2016) Review of Parathoracaphis Takahashi, 1958 with description of a new species from China (Hemiptera, Aphididae, Hormaphidinae). ZooKeys 623: 61-73. https://doi.org/10.3897/zookeys.623.10205
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The aphid genus Parathoracaphis Takahashi, 1958 is reviewed. Parathoracaphis spinapilosa sp. n., found on Quercus sp. and on an unidentified species of Fagaceae in China is described and illustrated. A generic diagnosis and a key to Parathoracaphis species are presented.
aphid, key, morphology, new taxa, Nipponaphidini
The aphid genus Parathoracaphis was erected by
Herein, a new species Parathoracaphis spinapilosa sp. n. is described, found on Quercus sp. and an unidentified species of Fagaceae in Fujian and Yunnan, China. Therefore, the genus Parathoracaphis now includes seven species: P. cheni (Takahashi), P. elongata (Takahashi), P. gooti (Takahashi), P. kayashimai (Takahashi), P. manipurensis (Pramanick, Samanta & Raychaudhuri), P. setigera (Takahashi), and P. spinapilosa sp. n.
Morphological description. Aphid terminology in this paper generally follows
Parts (For abbreviations see Materials and methods) |
Apterous viviparae (n = 25) | |||
---|---|---|---|---|
Mean | Range | Standard deviation | ||
Length (mm) | Body length | 0.710 | 0.624–0.778 | 0.038 |
Body width | 0.524 | 0.422–0.581 | 0.042 | |
Whole antenna | 0.065 | 0.059–0.074 | 0.004 | |
URS | 0.029 | 0.026–0.031 | 0.001 | |
Hind trochanter and femur | 0.076 | 0.072–0.082 | 0.003 | |
Hind tibia | 0.090 | 0.084–0.096 | 0.004 | |
2HT | 0.030 | 0.026–0.033 | 0.002 | |
Cauda | 0.016 | 0.012–0.017 | 0.002 | |
BW Cauda | 0.026 | 0.022–0.030 | 0.003 | |
Ant.IIIBD | 0.011 | 0.010–0.014 | 0.001 | |
Frontal setae | 0.032 | 0.028–0.037 | 0.003 | |
Submarginal setae on Tergite I | 0.037 | 0.032–0.041 | 0.002 | |
Spinal setae on Tergite VIII | 0.042 | 0.034–0.048 | 0.005 | |
Ratio (times) | Whole antenna / Body | 0.09 | 0.08–0.11 | 0.007 |
Hind tibia / Body | 0.13 | 0.11–0.14 | 0.007 | |
URS / BW URS | 1.14 | 1.04–1.26 | 0.071 | |
URS / 2HT | 1.01 | 0.92–1.13 | 0.082 | |
Cauda / BW Cauda | 0.61 | 0.50–0.70 | 0.063 | |
Frontal setae / Ant.IIIBD | 2.93 | 2.33–3.75 | 0.380 | |
Submarginal setae on Tergite I / Ant.IIIBD | 3.39 | 2.58–4.25 | 0.446 | |
Spinal setae on Tergite VIII / Ant.IIIBD | 3.82 | 2.80–5.00 | 0.701 |
COI sequencing. COI barcode sequence was obtained for the new species with primers LepF and LepR (
Specimen depositories. The holotype and some paratypes of the new species and all examined specimens of P. manipurensis and P. setigera are deposited in the National Zoological Museum of China, Institute of Zoology, Chinese Academy of Sciences, Beijing, China (NZMC). Four paratypes of the new species and the examined specimens of P. cheni are deposited in the Natural History Museum, London, UK (NHM).
Parathoracaphis Takahashi, 1958: 13. Type species: Thoracaphis setigera Takahashi, 1932; by original designation.
Hoplothoracaphis Pramanick, Samanta & Raychaudhuri, 1983: 1. Type species: Hoplothoracaphis manipurensis Pramanick, Samanta & Raychaudhuri, 1983; by monotypy.
Parathoracaphis
Takahashi:
In apterae, body elongate oval, oval, or subcircular, aleyrodiform, and strongly sclerotized. Prosoma consisting of fused head, thorax, and abdominal segments I–VII, abdominal segment VIII free. Dorsum of prosoma reticulated, corrugated, convoluted, or with wax pores. Submarginal setae on dorsal prosoma distinctly spine-like, pointed or somewhat blunt at apices, sometimes arising from tuberculate bases. Dorsal spinal setae on prosoma minute, long and fine, or spine-like. Abdominal tergite VIII with 4 setae, similar to submarginal setae on dorsal prosoma. Eyes 3-faceted. Antennae concealed under head, 2–4-segmented. Legs short, concealed under body; tarsi small, unsegmented or 2-segmented; claws small, normal, or absent. Siphunculi absent. Cauda knobbed and constricted at base. Anal plate bilobed.
China, India, Japan, Malaysia, and Thailand.
Fagaceae (Castanopsis, Cyclobalanopsis, Lithocarpus, and Quercus) and Lauraceae (Litsea).
Only apterous viviparous females are known. The life cycles of most species are unknown. Parathoracaphis is related to Neohormaphis Noordam, 1991 in sharing the consolidated head, thorax, and abdominal segments I–VII and spine-like submarginal setae on prosoma.
Thoracaphis cheni Takahashi, 1936: 21.
Parathoracaphis
cheni
:
Twelve apterous viviparous females, CHINA: Zhejiang (Huangyan), Jan 1934, on Myrica rubra, coll. F.G. Chen (NHM).
China (Zhejiang).
The host plant is recorded as Myrica rubra with a question mark in the original description (
Sitting tightly on the undersides of leaves of host plant (
Thoracaphis elongata Takahashi, 1941: 22.
Parathoracaphis
elongata
:
Thailand.
Quercus sp. and other unspecified Fagaceae species.
This species occurs in large numbers on the undersides of leaves of host plant (
Known only from the original description.
Thoracaphis gooti Takahashi, 1950: 605.
Parathoracaphis
gooti
:
Malaysia.
Quercus sp.
Infesting the undersides of leaves of host plant (
Known only from the original description. The figure in
Thoracaphis kayashimai Takahashi, 1950: 602.
Parathoracaphis
kayashimai
:
Malaysia.
Quercus sp.
Feeding on the undersides of leaves of host plant (
Hoplothoracaphis manipurensis Pramanick, Samanta & Raychaudhuri, 1983: 2.
Parathoracaphis
manipurensis
:
One apterous viviparous female, CHINA: Yunnan (Chuxiong City, Mt. Zixi), 22 Oct 2010, No. 24888, on Castanopsis sp., coll. X.L. Huang (NZMC); 1 apterous viviparous female, CHINA: Yunnan (Chuxiong City, Mt. Zixi), 22 Oct 2010, No. 24894, on Fagaceae, coll. X.L. Huang (NZMC).
China (Yunnan), India.
Castanopsis sp. and Litsea sebifera.
Forming large colonies on the undersides of leaves of host plant, attended by ants sometimes (Fig.
Parathoracaphis manipurensis (Pramanick, Samanta & Raychaudhuri). 1 Dorsal view of body of apterous viviparous female 2 a dense colony on underside of leaf of Castanopsis sp. 3 apterous adults in life, covered with much wax (2, 3: Mt. Zixi, Yunnan, China; 22 Oct 2010). Scale bar: 0.10 mm.
Thoracaphis setigera Takahashi, 1932: 72.
Parathoracaphis
setigera
:
Two apterous viviparous females, CHINA: Yunnan (Kunming City, 25.1407°N, 102.7465°E, altitude 1910 m), 18 Nov 2009, No. 23861, on Quercus sp., coll. J. Chen and Z.H. Luo (NZMC); 16 apterous viviparous females, CHINA: Yunnan (Kunming City, 25.0600°N, 102.7726°E, altitude 2000 m), 5 Dec 2009, No. 24111, on Quercus sp., coll. J. Chen and Z.H. Luo (NZMC); 17 apterous viviparous females, CHINA: Taiwan (Urai), 6 Sept 1931, No. Y7903, on Quercus sp., coll. R. Takahashi (NZMC).
China (Sichuan, Taiwan, and Yunnan), Japan.
Cyclobalanopsis gilva, Lithocarpus sp., Quercus glauca, and Quercus myrsinaefolia.
Apterae are scattered on the undersides of leaves of host plant, with a circle of thin and curved wax filaments along the margin of body and two rather long wax filaments at the hind end of body (Fig.
Parathoracaphis setigera (Takahashi). Apterous viviparous female: 4 dorsal view of body 5 submarginal setae on head dorsum 6 branched linear markings on marginal area of prosoma dorsum 7 apterous adult on underside of leaf of Quercus sp., bearing wax filaments marginally (Kunming, Yunnan, China; 5 Dec 2009). Scale bars: 0.10 mm.
The new species is named for a pair of spine-like, long, thick, and pointed frontal setae. “Spina” (Latin) means “thorn”, “pilosa” (Latin) means “hair”.
Body small, aleyrodiform. Dorsum of prosoma densely covered with convoluted markings medially and short folded-line shaped sculptures pleuro-marginally. Head with a pair of spine-like frontal setae. Dorsum of prosoma with four pairs of minute spinal setae and 16 pairs of spine-like submarginal setae. Antennae 3- or 4-segmented. Tarsi 2-segmented. Claws normal.
Apterous viviparous females: Body oval, aleyrodiform, and strongly sclerotized (Fig.
Body brown; cauda, anal plate, and genital plate pale in color. Prosoma consisting of fused head, thorax, and abdominal segments I–VII; abdominal segment VIII free (Figs
Parathoracaphis spinapilosa sp. n. Apterous viviparous female: 12 dorsal view of body 13 convoluted markings on medial area of prosoma dorsum 14 short folded-line shaped sculptures on pleuro-marginal area of prosoma dorsum 15 short transversely striped band on margin of prosoma 16 spine-like frontal seta on head 17 3 pairs of submarginal setae on head dorsum 18 submarginal setae on abdominal tergites V–VII 19 antenna 20 ultimate rostral segment 21 cauda 22 anal plate 23 genital plate. Scale bars: 0.10 mm.
Holotype: apterous viviparous female, CHINA: Yunnan (Kunming City, Mt. Xishan), 24 Apr 1995, No. 13480-1-4-2, on Fagaceae, coll. G.X. Qiao (NZMC). Paratypes: 25 apterous viviparous females, with the same collection data as holotype (NZMC); 4 apterous viviparous females, No. 13480-1-5, with the same collection data as holotype (NHM); 9 apterous viviparous females (COI: KX709878), CHINA: Fujian (Jiangle County, Mt. Longqi, 26.5109°N, 117.2907°E, altitude 730 m), 17 Jun 2011, No. 26901, on Quercus sp., coll. J. Chen, Q.H. Liu, and X.T. Li (NZMC).
The new species resembles the type species P. setigera (Takahashi), but differs from it as follows: dorsum of prosoma densely covered with convoluted markings medially and short folded-line shaped sculptures pleuro-marginally (Figs
China (Fujian and Yunnan).
Quercus sp. and unidentified Fagaceae species.
Forming large colonies on the undersides of leaves of host plant (Fig.
1 | Dorsum of prosoma with 4 pairs of minute spinal setae (the pair on abdominal tergite II absent) | 2 |
– | Dorsum of prosoma with 5 pairs of minute, long and fine, or spine-like spinal setae | 4 |
2 | Head with a pair of long thick and spine-like frontal setae; dorsum of prosoma with 16 pairs of spine-like submarginal setae; antennae 3- or 4-segmented | P. spinapilosa sp. n. |
– | Head with a pair of short, fine, and pointed frontal setae; dorsum of prosoma with 15 pairs of spine-like submarginal setae (the pair on abdominal tergite V absent); antennae 2-segmented | 3 |
3 | Submarginal setae on abdominal tergite VI much smaller than setae on other tergites | P. kayashimai (Takahashi) |
– | Submarginal setae on abdominal tergite VI thick spine-like, similarly sized with setae on other tergites | P. setigera (Takahashi) |
4 | Dorsal spinal setae on prosoma spine-like, similar to submarginal setae; tarsi unsegmented, without claws | P. elongata (Takahashi) |
– | Dorsal spinal setae on prosoma minute or long and fine; tarsi 2-segmented, with claws | 5 |
5 | Dorsum of prosoma with 15 pairs of spine-like submarginal setae (the pair on abdominal tergite V absent); antennae 2-segmented | P. cheni (Takahashi) |
– | Dorsum of prosoma with 16 pairs of spine-like submarginal setae; antennae 3- or 4-segmented | 6 |
6 | Dorsum of prosoma without minute wax pores; head dorsum with a pair of submarginal setae near the front end and 2 pairs between eyes | P. gooti (Takahashi) |
– | Dorsum of prosoma densely covered with minute wax pores; head dorsum with 3 pairs of submarginal setae arranged in a row along the body margin | P. manipurensis (Pramanick, Samanta & Raychaudhuri) |
We are grateful to Prof. C.C. Tao for presenting specimens of Parathoracaphis setigera (Takahashi). Sincere thanks are also due to X.L. Huang, X.T. Li, Q.H. Liu, and Z.H. Luo for collections, to F.D. Yang for making slides, and to T.T. Xu for sequencing the DNA fragment. The work was supported by the National Natural Sciences Foundation of China (Nos. 31430078, 31402000, 31561163002), the External Cooperation Program of Chinese Academy of Sciences (No. 152111KYSB20130012), and a grant from the Ministry of Science and Technology of the People’s Republic of China (No. 2011FY120200).