Signiphora aspidioti Ashmead, 1900

Woolley, J. B. & Dal Molin, A., 2017, Taxonomic revision of the flavopalliata species group of Signiphora (Hymenoptera: Signiphoridae), Zootaxa 4315 (1), pp. 1-150: 16-19

publication ID

https://doi.org/10.11646/zootaxa.4315.1.1

publication LSID

lsid:zoobank.org:pub:4B923D2F-4D36-4AA1-BAC9-C9F1CE20E87B

persistent identifier

http://treatment.plazi.org/id/8E21B933-FF80-7C22-FF64-7467FBB52E8E

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Plazi

scientific name

Signiphora aspidioti Ashmead, 1900
status

 

Signiphora aspidioti Ashmead, 1900  

Figures 17–32 View FIGURES 17 – 20 View FIGURES 21 – 26 View FIGURES 27 – 32

http://eol.org/pages/855971/

Signiphora aspidioti Ashmead, 1900:412   . Female.

urn:lsid:zoobank.org:act:F0026B30-C2E5-46A4-A1C7-2F22E4372683 Thysanus aspidioti: Peck (1951)   ; Yoshimoto (1965).

Signiphora aspidioti   : Nikol'skaya (1952); Rosanov (1965).

Diagnosis. Fore wing marginal vein without seta M1; male metasoma uniformly brown (males common); both sexes with antennal clava pale with apical 1/2 distinctly dusky; female with Mt1 length:Mt2 length usually 0.50 (0.50–0.62); female with Mt8 anterior margin with rounded medial incision or broadly concave.

This species is most similar to S. borinquensis   and S. lutea   . Signiphora aspidioti   can be distinguished from S. borinquensis   by the more deeply incised anterior margin of Mt 8 in female and by the greater extent of dusky color on the antennal clava (apical 1/2 versus apical 1/6). Signiphora aspidioti   females can be distinguished from S. lutea   females by the distal 1/3 of the antennal clava slightly dusky and the distal spine on the mesofemur 1/4–2/3× length of the proximal spine in the latter. In S. aspidioti   the distal spine is very short, less than 1/4× length of the proximal spine.

Description. Female. Length, anterior margin of pronotum to epiproct apex, 0.41–0.62 mm (n=10). Head uniformly brown, darkest at vertex and lightest at gena and frons. Antenna pale with distal half of clava dusky, margin between pale area and dusky area distinct. Pronotum except lateral margins, and anterior 1/2–5/6 and medial 2/3 mesoscutum brown. Remainder of pronotum and mesoscutum, scutellum, metanotum, propodeum, Mt1 orange or pale yellow to pale white; Mt2–Mt3 and anterior half of Mt4 to anterior half of Mt5 dark brown, darkest laterally; remainder of terga orange-yellow, Mt6 occasionally dusky laterally; Mt8, epiproct and ovipositor sheaths slightly dusky; fore wing infuscated from base to below distal end of stigmal vein or occasionally slightly beyond with two hyaline areas under submarginal vein; legs pale yellow.

Head. Mandibular ducts enlarged apically; pedicel length:scape length 0.60–0.75; funicle with 3 anelli, second anellus subequal to 3× length of first, third anellus 2.5–4× length of first, clava length:scape length 1.54–1.83; vertex and frons finely and transversely striate with four longitudinal rows of minute punctations.

Mesosoma. Pronotum and mesoscutum transversely imbricate, scutellum, metanotum and propodeum weakly so; scutellum with 4 or 6 setae (see discussion) and 2 campaniform sensilla; medial propodeal sclerite rounded, process on medial sclerite rounded or pointed apically. Fore wing length:width 3.3–3.7, fore wing LMS:fore wing width 1.4–1.8; marginal vein length:stigmal vein length 1.5–2.4; marginal vein with 5 dorsal setae and without ventral setae, seta M1 absent; seta M3 length:marginal vein length 0.42–0.73; apical end of costal cell at seta M2– M3. Hind wing with subparallel margins; length:width 6.7–11.7; hind wing width:fore wing width 0.30–0.46; hind wing LMS:hind wing width 3.17–5.67; mesofemur with 1 long spine and 1 short spine in posteroapical margin; mesotibial spur with 3–5 teeth, mesotibial spur length:basitarsus length 0.81–1.19; basitarsus length:mesotibia length 0.40–0.55.

Metasoma. Mt1 bilobed to strongly bilobed with medial portion transverse (see discussion); Mt1 subequal to or slightly longer than Mt2; ovipositor with apical margin lying under Mt3–Mt5; ovipositor length:metasoma length 0.52–0.79; ovipositor sheath length:ovipositor length 0.20–0.27; Ms3–Ms6 with anterior projections short to medium; Ms 6 in posterior 1/4 metasoma and with 8 or 9 setae; Mt8 with anterodorsal margin with rounded medial emargination or broadly and medially concave with convex lateral margins.

Male. Length, anterior margin of pronotum to epiproct apex, 0.41–0.48 mm. As described for female except the following: anterior ¾ of mesoscutum brown, propodeum dusky lateral to medial sclerite and medial sclerite pale brown, metasoma entirely brown or with Mt5 light brown and Mt6 brown. Antennal clava with pale basal 1/2 and dusky apical 1/2 more distinctly different than female clava (but see discussion). Genitalia normal for flavopalliata   group; digitus length twice its width; digitus with one short apical denticle and one seta at its midpoint. Ms8 a narrow transverse strip, extending past cerci laterally.

Discussion. The holotype female of S. aspidioti   has 6 setae on the mesoscutum, all other specimens examined have 4 setae on the mesoscutum. In addition, the lateral margins of the pronotum and posterolateral areas of the mesoscutum are light brown on the holotype, but these areas are much lighter in color on other specimens. The posterior portion of Mt1 is bilobed with the medial portion rounded in the holotype and topotypical female from San Luis, Mexico, and in the series from Weslaco, Texas, whereas in other specimens examined Mt1 is bilobed with the medial portion transverse. The series from Austin, Texas, otherwise agrees with the diagnosis for S. aspidioti   , but the antennal clava in both sexes is uniformly pale or only very weakly dusky apically. Ashmead refers to only one “ type in the description, although there is a second specimen with same collection data as holotype [ USNM ENT 763012 ( USNM)]. That specimen is labeled “homotype” and therefore has no nomenclatural standing.

Type material. Signiphora aspidioti Ashmead   , HOLOTYPE ♀ [examined]: in balsam, USNM Type 4859, Mexico, [state unknown], San Luis, coll. C.H. Townsend, XI-1894, ex Aspidiotus nerii (Bouché)   .

Other material examined. AUSTRALIA: Queensland : 1 ♀, UCRC ENT 299185 View Materials ( UCR). ECUADOR: Galapagos: 12 ♀, TAMU-ENTO X0424915, X0424922, X0424936, X0424928, X0424942 X0424946, X0609355, X0609360, X0609361, X0609370, X0609372, X0609373 ( TAMU). MEXICO: 1 mixed series, 1 ♀, UCRC ENT 299186 View Materials ( UCR); USNM ENT 763012 View Materials ( USNM). MEXICO: Baja California Sur: 1 mixed series. UCRC ENT 299189 View Materials ( UCR). MEXICO: Michoacán: 2 mixed series. UCRC ENT 299186–299187 View Materials ( UCR). USA: California: 1 mixed series, 1 ♀, UCRC ENT 299188, 299190 ( UCR). USA: Hawaii: 1 mixed series, 2 ♀, 1 unknown. USNM ENT 763008, 763011 ( USNM); UCRC ENT 299183 View Materials (damaged); UCRC ENT 299184 View Materials ( UCR). USA: Texas: 6 ♂, 29 ♀, 1 mixed series. INHS 72510 View Materials ( INHS); USNM ENT 763010 View Materials ( USNM); TAMU-ENTO X0424886–X0424893 ( TAMU); TAMU-ENTO X0460255, X0460257–X0460262, X0460264–X0460276, X0460278–X0460282 ( TAMU); TAMU-ENTO X0460277 ( UCR).  

Biology. This species appears to be biparental; however, the 21 specimens from the Weslaco, Texas reared series are all females. In continental USA and Mexico the species is an armored scale parasitoid. In particular, two genera are attacked, Aspidiotus Bouché   and Hemiberlesia Cockerell. However   , the single series from Hawaii was recorded to parasitize Asterolecanium Targioni Tozzetti   ( Hemiptera   : Asterolecaniidae   ). Although further details are not available, this is a very unusual host record for a member of the flavopalliata   group.

LMS

Carolina Biological Supply Company

USNM

Smithsonian Institution, National Museum of Natural History

ENT

Ministry of Natural Resources

UCRC

University of California, Riverside

UCR

University of California

TAMU

Texas A&M University

INHS

Illinois Natural History Survey

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Signiphoridae

Genus

Signiphora

Loc

Signiphora aspidioti Ashmead, 1900

Woolley, J. B. & Dal Molin, A. 2017
2017
Loc

Signiphora aspidioti

Ashmead 1900: 412
1900