Research Article |
Corresponding author: Mariusz Kanturski ( kanturski.m@gmail.com ) Academic editor: Roger Blackman
© 2018 Shalva Barjadze, Andrew S. Jensen, Mariusz Kanturski.
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:
Barjadze S, Jensen AS, Kanturski M (2018) Ericaphis voegtlini, a new, unusual aphid species from the USA (Hemiptera, Aphididae). ZooKeys 785: 133-143. https://doi.org/10.3897/zookeys.785.28006
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Ericaphis voegtlini sp. n. living on Chamaebatia foliolosa (Rosaceae) in California is described based on apterous and alate viviparous females. The new species differs from all other species of the genus Ericaphis Börner, 1939 in several important morphological characters including very long and rigid dorsal setae and distinctly swollen siphunculi with clearly visible polygonal reticulation.
Chamaebatia , description, Macrosiphini , new species, taxonomy
The genus Ericaphis was established by
The plant genus Chamaebatia Benth. (Rosaceae) is a local endemic of California, USA with two shrub species: Chamaebatia australis (Brandegee) Abrams and Chamaebatia foliolosa Benth. (
During work in the Aphididae collection of the Natural History Museum in London (United Kingdom) specimens of the above-mentioned Ericaphis–like undescribed species collected by David Voegtlin on C. foliosa in California, USA were found by M. Kanturski. In addition, specimens of the same species were collected by A. Jensen on the same plant and in the same area of California in 2014.
The new species, living on Chamaebatia foliolosa from California, USA, is here described based on apterous and alate viviparous females sampled by David Voegtlin, D. Hille Ris Lambers, and Andrew Jensen.
The specimens were examined using light microscope Nikon Eclipse E600 with differential interference contrast (DIC) and photographed by Nikon DS–Fi camera. The measurements were done according to
ANT antennae or their lengths;
ANT I–VI antennal segments I, II, III, IV, V, VI or their lengths (ratios between antennal segments are simply given as e.g. ‘VI: III’);
BASE basal part of last antennal segment or its length;
BD III basal articular diameter of ANT III;
BL body length (from anterior border of the head to the end of cauda);
FEMORA III hind femora length;
HW greatest head width across compound eyes;
HT I first segment of hind tarsus;
HT II second segment of hind tarsus or its length;
LS ANT III length of longest setae of ANT III;
PT processus terminalis of last antennal segment or its length;
SIPH L siphunculi length,
SIPH W maximum width of swollen part of siphunculus;
TIBIAE III hind tibiae length;
URS ultimate segments of rostrum (IV + V) or their length.
Depositories of type material:
AJ Andrew S. Jensen Aphididae Collection (USA);
ISU Institute of Zoology at Ilia State University (Georgia);
Apterous viviparous females differ from other Ericaphis by having a well–developed quadrangular median frontal tubercle, and long and rigid dorsal setae on head, thorax, and abdominal dorsum. The siphunculus is also unusually swollen and has 4–7 rows of polygonal cells in its subapical zone. The new species shares with E. avariolosa (David, Rajasingh & Narayanan, 1971), E. leclanti Remaudière, 1971, and E. wakibae (Hottes, 1934) some features of the siphunculus (e.g. slightly swollen with row(s) of polygonal cells in the subapical zone) but differs in the other above-mentioned characters.
Measurements of apterous and alate viviparous females of Ericaphis voegtlini sp. n.
Character | Apterous viviparous females (n=34) | Alate viviparous females (n=22) |
BL | 1.299–1.90 | 1.67–2.00 |
BW | 0.540–0.900 | 0.70–0.78 |
HW | 0.32–0.39 | 0.37–0.394 |
ANT | 0.97–1.65 | 1.80–2.026 |
ANT III | 0.20–0.38 | 0.39–0.44 |
ANT IV | 0.14–0.30 | 0.35–0.4423 |
ANT V | 0.15–0.30 | 0.31–0.359 |
ANT VI | 0.34–0.50 | 0.57–0.69 |
BASE | 0.085–0.110 | 0.12–0.146 |
PT | 0.25–0.39 | 0.45–0.57 |
III FEMORA | 0.34–0.64 | 0.60–0.664 |
III TIBIAE | 0.5–1.12 | 1.19–1.274 |
HT II | 0.07–0.08 | 0.080–0.085 |
Rostrum | 0.35–0.49 | 0.44–0.492 |
URS | 0.12–0.14 | 0.135–0.154 |
SIPH L | 0.26–0.53 | 0.46–0.472 |
SIPH W (most wide part) | 0.04–0.07 | 0.05–0.06 |
SIPH W (most narrow part) | 0.034–0.06 | 0.035–0.05 |
Cauda L | 0.125–0.22 | 0.15–0.175 |
Cauda W (at base) | 0.09–0.14 | 0.10–0.12 |
Holotype: UNITED STATES OF AMERICA, California: Calaveras Co., Board’s Crossing, Stanislaus N. F. (38°18'13"N; 120°14'54"W, 1180 m a.s.l.), 15 April 2014, on Chamaebatia foliolosa, A. Jensen leg., 1 apterous viviparous female marked as holotype (“H”) and circle on the slide, AJ7029,
Apterous viviparous female (n = 34). Colour in life: dark green. On slide: body in general sclerotised, pale yellow to yellow. ANT yellow with brown distal part of ANT IV and whole ANT V–VI. Tibiae yellow with brown to dark brown distal parts (but the very apex of tibiae lighter). Tarsi light brown to brown. SIPH pale to yellow basally and brown to dark brown distally (Figure
Slide–mounted specimens: HW 0.23–0.36 × ANT. Head chaetotaxy: head with three dorsal pairs of setae; median tubercle with 4–5, ANT tubercles each with 3–5 long, rigid, thick setae with blunt or narrow capitate apices, 0.017–0.052 mm long. Frontal setae 0.037–0.050 mm long (Figure
Alate viviparous female (n=22). Colour in life: unknown. On slide: head and ANT light brown to brown with basal part of Ant III and PT lighter. Pronotum light brown, rest of thorax brown. Wings hyaline with light brown veins (cubital veins slightly darker). Femora brown with pale proximal part and dark distal part. Tibiae yellow to light brown with brown to dark distal part. Abdomen with brown sclerotisation, SIPH brown with lighter apical part, cauda brown (Figure
Slide–mounted specimens: HW 0.18–0.21 × ANT. Head chaetotaxy: head with four dorsal pairs of long, rigid, thick setae with capitate apices, 0.022–0.050 mm long. Frons with four setae, ANT tubercles with 2–4 setae (Figure
The authors have the pleasure in naming the new species to honour Dr. David Voegtlin, an aphid specialist from the Illinois Natural History Survey (University of Illinois, Urbana–Champaign, USA), who was also the first collector.
The new aphid species is associated with Chamaebatia foliolosa Benth. (Rosaceae). Its sexual morphs and life history are unknown, but probably it is monoecious holocyclic. The aphid species is presumably endemic to California, as is its host plant.
Spinal and marginal tubercles in apterous viviparous females of Ericaphis voegtlini sp. n. a Two pairs on ABD VII and ABD VIII b Only one tubercle on ABD VII and ABD VIII c One tubercle on ABD VII and two tubercles on ABD VIII d Only two tubercles on ABD VIII (The location of the marginal tubercles indicated by arrows) e Marginal tubercles on ABD II–VII (Tubercles on ABD I and ABD VIII indicated by arrows).
Appropriate generic placement of this species was challenging due to its unusual features, including its prominent median frontal tubercle, robust dorsal setae, and swollen reticulated siphunculi. It was tempting to consider this aphid the first of a new genus. In the end we opted for placement in Ericaphis for a few reasons. First, E. voegtlini shares important features with most Ericaphis, including the presence of a median frontal tubercle (albeit more extreme), typically two pairs of lateral setae on the cauda (plus one dorso–apical seta), dorsal pigmented abdominal patch in the alate vivipara, no secondary rhinaria on antennal segment III in the apterous vivipara, and relatively few and large secondary rhinaria on antennal segment III in the alate vivipara. Second, there are western North American species scattered among at least three genera (Aulacorthum, Ericaphis, and Wahlgreniella) that share many features and that may be closely related. Ideally, the generic classification of these aphids should be done as a more comprehensive study, using all the similar and related species currently placed in these, and possibly other, genera. Third, the aphids of western North America are still in need of basic discovery work in the field. The second author spends hundreds of hours each year collecting aphids and making field observations, and has discovered, and continues to discover, many new species and host plant relationships (see http://aphidtrek.org/), including isolated samples and observations of aphids related to the above–mentioned genera. Comprehensive analysis of the relevant generic classification, therefore, is best delayed until more of the currently undescribed and undiscovered aphid species are documented and described. In the meantime, E. voegtlini is a distinctive, easily recognised species that feeds on an unusual plant with a very limited distribution, and interim placement of it in Ericaphis is a practical choice. We hope that by publishing its description we will draw attention to the possible undiscovered diversity of this aphid group in North America.
We are sincerely grateful to Paul A. Brown and David Ouvrard (Natural History Museum, London, UK), for their kind help and support during visits to the collection as well as for the loan of the many Ericaphis slides. We would like to thank the reviewers Juan Manuel Nieto Nafría and Andrey V. Stekolshchikov as well as to Roger Blackman for all comments and suggestions that improved the first version of the manuscript.
Mariusz Kanturski gratefully acknowledges the Scholarship for Outstanding Young Scientists from the Ministry of Science and Higher Education of Poland (1165/E–340/STYP/12/17).