Anomalosiphum, 2006

Quednau, F. W. & Martin, J. H., 2006, Descriptions of two new species of Anomalosiphum (Hemiptera: Aphididae, Greenideinae), including a winged ovipara with pedunculate eggs, Zoological Journal of the Linnean Society 146 (2), pp. 239-249 : 239-242

ANOMALOSIPHUM MENDELI SP. NOV.

( FIGS 1–27 )

Description

Alate vivipara (from two teneral specimens). Slidemounted specimens pale except for ant. segm. I and II, fore tibiae and siph. which are dusky; ant. segm. III and IV dark brown.

Morphology. Discal setae of vertex pointed, 15 µm long. Ant. 0.7 times body length, segm. III markedly swollen on basal half of segment, with about 7 pointed setae 11 µm long; segm. III, IV and base of V bearing 77–84, 20–21 and 0 (exceptionally 4 from an alatoid nymph) semiannular secondary sens., respectively; lengths of flag. segm., III 0.57, IV 0.37, V base 0.19, pt 0.12–0.13. Urs 0.099 long, 0.96 times ht2. Pronotum with 8 setae, with a marginal papilla on each side; sides of pronotum smooth. Mesoscutellum without setae. Metanotum with lateral membranous parts being without setae. Tc1 3: 3: 3, on second tarsomere lateroapical setae fine and thin, pointed. Dorsal surface of abdomen smooth, without sclerotization, possibly due to the teneral condition of the specimens. Dorsal abdominal setae sparse, blunt or pointed; paramedian setae on tergites I–VI 4–6 each, VII bearing 6 and VIII bearing 2–3 setae (2 borne on the processes); longest setae on tergites I, VII and VIII are 11, 19 and 38–45 µm, respectively. On tergite VII one pair of outer setae sometimes on a short, spiculose process about 8 µm long. Processes on tergite VIII 68 µm long. One conspicuous marginal papilla on each side of tergites I–V. Siph. swollen 0.21–0.23 long, 0.11 times body length, with a ring of 5 setae. Cauda rounded triangular, bearing 4 long and 2 shorter pointed setae and with an indistinct preapical process. Anal plate with about 15 setae. Rudimentary gonapophyses 2 or 3. Subgenital plate with 14 setae. Body 1.87–2.02 long.

Embryo. Eye a triommatidium. Ant. 4-segmented. Frontal and three pairs of anterior discal setae broad flabellate, expanding immediately from bases, 11 µm long; posterior discal setae 2 pairs, flabellate, 5 µm long. Dorsal body setae until tergite VI minute, flabellate with rather few jagged cusps. Pronotum with 2 pairs each of marginal and spinal setae. Meso- and metanotum each with 2 pairs of marginal and 1 pair each of spinal and pleural setae. Tergites I–VI each with 1 pair of spinal, pleural and marginal setae. Tergite VII with 4 setae, of which those of the inner pair 19 µm long, elongate flabellate, and on processes. Tergite VIII with 2 cylindrical setae with flabellate apices, 30 µm long, also on processes. Siph. well developed. Integument smooth. Chaetotactic formula of ant. segm: 1 + 1, 3, 3, 2. Chaetotactic formula of rostrum: 0, 5, 2, 1 + 4.

Alatoid nymph (from 1 specimen). Pale, legs, antennae and wing pads weakly pigmented. Ant. 0.6 times body length. Anterior discal setae of vertex 8–15 µm, flabellate, the longest with cylindrical basal half; posterior discals and remainder of dorsal body setae minute, 6–8 µm long, flabellate or with denticulate apices. On pronotum a pair of conspicuous marginal papillae, sides of pronotum weakly scabrous. Dorsal abdominal setae sparse, paramedian setae of tergites I–VI one pair of spinal and one pair of pleural setae, tergite VII bearing 6 (2 borne on the processes) and VIII 2 setae on processes. Processes on tergites VII and VIII 197 µm and 315 µm long, respectively, setae on processes 15 µm long. Siph. 0.21 long. Marginal papillae well developed from tergites I–V. Dorsal body integument smooth, except for sides of pronotum and for spicules on processes. Cauda with a dorsal process 64 µm long. Body 1.93 long.

Alate ovipara (from 6 specimens). In slide-mounted specimens head, thorax, legs and siphunculi brown, sclerotic parts of abd. pale brown; ant. flagellum and mesonotum more strongly pigmented; ventral abd. sclerites pale brown; pterostigma pale with dark inner bordering.

Morphology. Similar to the alate vivipara but differing as follows: Ant. segm. III, IV and base of V bearing 60–72, 10–21 and 0–1 semiannular secondary sens., respectively; lengths of flag. segm., III 0.43–0.61, IV 0.27–0.38, V base 0.17–0.21, pt 0.11–0.15. Urs 0.091 – 0.106 long, 0.86–1.08 times ht2. Pseudosensoria on tibia absent. Sides of pronotum with a few spicules; posterior part of pronotum with a pair of ‘posttergites’ (Wegierek, 2002) well developed. Dorsal sclerotization of abd. consisting of a free transverse paramedian band over tergite I and of ill-defined spinopleural bands that may fuse to form a large quadrate patch of irregular outline over tergites II–V and another medially indented patch over tergites VI–VII. Intersegmental sclerites developed in front of tergites I, II and VI. Marginal abd. sclerites present on tergites II–V, small, mutually free, sometimes poorly defined. On tergite VII pair of short processes up to 15 µm long. Tergite VIII bearing 4 setae, of which 2 at the base and 2 at the apex of the processes. Cauda semicircular without process. Anal plate large, rounded, spiculose, with about 50 setae. Subgenital plate large, bulging, with a few rows of spicules, with about 65 setae. Rudimentary gonapophyses 4. Apodemes of rudimentary ovipositor skeleton 3. Ventral abd. sclerites developed in pairs sublaterally on sternites III–VI, spiculose. Body 1.62–1.96 long.

Egg. Oblong elliptical, 0.40 × 0.18, translucent. A short peduncle 30 µm long on one pole. This appears to be an eversion of the chorion with a dark granulate surface of the exochorion (see Fig. 49 ).

Alate male (from 4 specimens). Colour when mounted on slides pale with dark brown ant.; legs, siph. and inner margin of pterostigma infuscated.

Morphology. Very similar to the alate vivipara with the following exceptions: Ant. segm. III bearing 19–31 semiannular secondary sens., other flag. segm. without secondary sens; lengths of flag. segm., III 0.53– 0.60, IV 0.34–0.37, V base 0.20–0.22, pt 0.10–0.11. Sides of pronotum weakly spiculose. Tergite I and marginal lobes of tergites I–V weakly spiculose. Processes of tergite VIII 70–90 µm long excluding seta. Cauda with an apical process 42 µm long. Genital armature relatively small, weakly sclerotized; aedeagus of penis rounded, with a few minute setae. Subgenital plate developed as a narrow bar bearing about 10 minute setae. Body 1.49–1.62 long.

Host plant

Unknown (obtained from canopy fogging).

Material examined

HOLOTYPE alate ovipara, EAST MALAYSIA: Sabah, Danum Valley field station, 6.vi.1999 (H. Mendel et al.) (The Natural History Museum, London) . PARATYPES: 2 alate viviparae, 7 alate oviparae, 6 males and 13 alatoid nymphs, of which 7 viviparous, same data as for holotype .

Comments

This species is easily recognized by the very great number of sensoria on the strongly swollen ant. segm. III, the presence of conspicuous marginal papillae on pronotum and tergites I– V, and the relatively sparse number of paramedian setae on the abdomen. Named after its collector Howard Mendel. This is the first record of alate oviparae in the genus Anomalosiphum , although they are also known to occur in genera of the Greenideini .

Figures

Figures 1–17. Anomalosiphum mendeli sp. nov., paratypes. Figs 1–9, alate vivipara: 1, body; 2, head and pronotum; 3, ant. flagellum; 4, variant of ant. segm. V; 5, urs; 6, ht2; 7, marginal abd. setae and marginal papilla; 8, siph.; 9, posterior abd. Figs 10, 11, alate male: 10, ant. flagellum; 11, posterior abd., ventral view. Figs 12, 13, embryo: 12, body; 13, rostrum. Figs 14–17, alatoid nymph: 14, body; 15, head and pronotum; 16, ant. flagellum; 17, siph.

Figures 18–27. Anomalosiphum mendeli sp. nov., alate ovipara, holotype: 18, body; 19, head and pronotum; 20, ant. segm. III & IV; 21, ant. segm. V; 22, urs; 23, ht2; 24, marginal abd. sclerites; 25, siph.; 26, posterior abd.; 27, posterior abd., ventral view. apd = apodeme of rudimentary ovipositor; apl = anal plate; gpl = genital plate; p = posttergite; rg = rudimentary gonapophyses.

Figures 49–56. Pedunculate eggs of aphids: 49, Anomalosiphum mendeli; 50, Eutrichosiphum sp.; 51, Greenidea (Trichosiphum) okajimai; 52, Allotrichosiphum kashicola; 53, Schoutedenia lutea; 54, Neophyllaphis podocarpi; 55, Neophyllaphis (Chileaphis) podocarpini; 56, Aiceona himalaica.