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Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species
No full textGuerrieri, Emilio, Cascone, Pasquale (2018): Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species. Zootaxa 4531 (3): 374-382, DOI: 10.11646/zootaxa.4531.3.
Anagyrus subnigricornis Ishii 1928
No full textAnagyrus subnigricornis Ishii Material examined. 1 ♀ South Africa, Limpopo province, 234518 m E 7357213 m S (= 23°52'28.5"S 30°23'34.7"E), 0 1.05.2017, ex Delottococcus aberiae (De Lotto) on Citrus x paradisi, Star Ruby, (V. Martínez- Blay & J. Puig); 1 ♀, India, Tamil Nadu, Mangarai Forest, 28.ix.1979 (J. S. Noyes); 1 ♀, Thailand, Trang Prov. Kaophapphia, Kaochang, 200m, light trap, 1- 3.1.1964 (G. A. Samuelson). Comments. The species was described in detail and pictured by Ishii (1928). We have examined material identified by J.S. Noyes at NHM and have little doubt about species identity. D. aberiae represents a new host record for this species.Published as part of Guerrieri, Emilio & Cascone, Pasquale, 2018, Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species, pp. 374-382 in Zootaxa 4531 (3) on page 376, DOI: 10.11646/zootaxa.4531.3.3, http://zenodo.org/record/261473
Anagyrus aurantifrons Compere 1926
No full text<i>Anagyrus aurantifrons</i> Compere <p>(Fig. 13–17)</p> <p> <b>Material examined.</b> Paratype: 1 ♀ “ Anagyrus aurantifrons ” “ Cape Town, South Africa ”, “ins. 12.viii,1924 at Riverside”, “ex mealybug on oleander” “citrus lab n° a9”, “E. W. Rust coll”(NHM); 1 ♀ South Africa, Western Cape, Stellenbosch, 33°56'42.4"S + 18°50'33.8"E, ex <i>Delottococcus aberiae</i> on <i>Olea europaea</i> subsp. <i>africana</i> (V. Martínez-Blay & J. Puig).</p> <p> <b>Comments.</b> The species, described and pictured by Compere (1926, 1939), is close to <i>A. antoniae</i> (see comments under <i>antoniae</i>). <i>Delottococcus aberiae</i> represents a new host record for this species.</p>Published as part of <i>Guerrieri, Emilio & Cascone, Pasquale, 2018, Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species, pp. 374-382 in Zootaxa 4531 (3)</i> on page 379, DOI: 10.11646/zootaxa.4531.3.3, <a href="http://zenodo.org/record/2614738">http://zenodo.org/record/2614738</a>
Anagyrus antoniae Guerrieri & Cascone 2018, sp. nov.
No full textAnagyrus antoniae Guerrieri sp. nov. (Fig. 8–12) Description. Female (Holotype). Length, 1.1 mm. Head (Fig. 8) dark orange, gena with posterior margin brown, thorax dark orange, tegula whitish with brown apex; antenna (Fig. 9) with radicle brown, scape largely brown except two whitish bands at base and close to apex; pedicel brown at base and whitish at apex; F1 brown, remaining parts of antenna uniformly whitish; legs yellow, dorsum of femora and tibiae bordered with brown (particularly so on middle legs), tarsi with last segment brown; forewing hyaline, venation (Fig. 10) brown; gaster brown. Head (Fig. 8) on FV between anterior ocellus and top of scrobes appearing smooth with extremely weak sculpture resembling that of mesoscutum; HW about 3,2× FV; ocelli forming an angle of about 90°; lowest margin of antennal torulus below lowest eye margin; antenna (Fig. 9) with scape about 2× as long as wide, F1 about 0.6× as long as pedicel, funicular segments of about the same length and increasing in width toward apex, F6 about 1.2× as long as broad. Relative measurements: HW 52, FV 16, POL 10, OOL 2, OCL 4, EL 34, EW 26, MS 12, SL 30, SW 15. Mesoscutum 0.5× as long as wide and a little shorter than scutellum (13:12); forewing about 2.6× as long as broad, PMV (Fig. 10) shorter than MV; MV shorter than SV. Relative measurements: FWL 136, FWW 52, MV 7.5, PMV 4.5, SV 10. Metasoma about 1× as long as head and thorax together; ovipositor not exserted. Paratype: hypopygium (Fig. 11) heart shaped, 1×as wide as long; ovipositor (Fig. 12) about 1.3× as long as mid tibia and 4.5× as long as gonostylus. Relative measurements: OL 110, MT 85, GL 25. Male. Unknown. Variation. None in the two specimens at hand. Hosts. The species was reared from Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) on hybrid grapefruit (Citrus x paradisi) (Rutaceae) Distribution. South Africa. Type material. Holotype ♀, South Africa, Limpopo province, 234518 m E 7357213 m S (= 23°52'28.5"S 30°23'34.7"E), 0 9.03.2017, ex Delottococcus aberiae (De Lotto) on Citrus x paradisi, Star Ruby (V. Martínez-Blay & J. Puig) (card-mounted). Paratype 1 ♀, same data as holotype (slide-mounted). Holotype deposited at NHM; paratype deposited at DEZA. Sequences deposited in GenBank: (Ang007) MH 401215. Comments. Females of A. antoniae are similar to those of A. aurantifrons (Compere, 1926) and A. amoenus (Compere, 1939) for general colour and antenna features. Apart from molecular evidence (see below and Fig. 18 for GenBank sequences examined), A. antoniae can be separated from A. aurantifrons by the proportion of ovipositor being 4.5x as long as gonostyli (3.5x in aurantifrons) and from amoenus by fore wing venation with MV and PMV combined distinctly longer than SV (distinctly shorter in amoenus). The species is named in honour of Dr. Antonia Soto Sanchez.Published as part of Guerrieri, Emilio & Cascone, Pasquale, 2018, Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species, pp. 374-382 in Zootaxa 4531 (3) on page 378, DOI: 10.11646/zootaxa.4531.3.3, http://zenodo.org/record/261473
È un Metaphycus il primo parassitoide di Toumeyella parvicornis (Cockerell) ritrovato in Campania
No full textAnagyrus aberiae Guerrieri & Cascone 2018, sp. nov.
No full text<i>Anagyrus aberiae</i> Guerrieri sp. nov. <p>(Fig. 1–7)</p> <p> <b>Description.</b> <i>Female</i> (Holotype). Length, 1.6 mm. Head (Fig. 1) and thorax orange, tegula whitish with brown apex; antenna (Fig. 2) with radicle brown, scape largely brown except for two whitish bands at base and close to apex; pedicel and F1 brown at base and whitish at apex; remaining parts of antenna uniformly whitish; legs yellow with apices of tarsi brown; forewing hyaline, venation (Fig. 3) brown; dorsum of gaster brown, sides and ventral part orange.</p> <p>Head (Fig. 1) on frotovertex between anterior ocellus and top of scrobes appearing smooth with extremely weak sculpture resembling that on mesoscutum; HW about 2.6× FV; ocelli forming an angle of about 90°; lowest margin of antennal torulus below lowest eye margin; antenna (Fig. 2) with scape about 2× as long as wide, F1 about 0.6× as long as pedicel, funicule segments of about the same width and decreasing in length toward apex, F6 subquadrate, about 1.1× as long as broad. Relative measurements: HW 52, FV 20, POL 10, OOL 4, OCL 4, EL 34, EW 20, MS 10, SL 28, SW 14.</p> <p>Mesoscutum 0.5× as long as broad and a little shorter than scutellum (13:12); forewing about 2.7× as long as broad, PMV (Fig. 3) slightly shorter than MV; MV slightly shorter than SV. Relative measurements: FWL 130, FWW 50, MV 6, PMV 4, SV 8.</p> <p> Metasoma about 1.3× as long as head and thorax together; ovipositor slightly exserted. <i>Paratype</i>: hypopygium (Fig. 4) heart-shaped, 1.2×as wide as long; ovipositor (Fig. 5) about 1.3× as long as mid tibia and 4.5× as long as gonostylus. Relative measurements: OL 127, MT 100, GL 27.</p> <p> <i>Male</i>. Similar to female except for antenna (Fig. 6) and genitalia. Scape about 4× as long as broad; pedicel subquadrate, all funicular segments longer than broad, their length decreasing towards apex, F1 4× as long as broad and about 3× as long as pedicel, F6 about 2.5× as long as broad; clava about 6× as long as broad and slightly longer than F5 and F6 together. Scale-like glands (Guerrieri <i>et al.</i> 2001) (Fig. 7) on F6 (5) clava (2). Relative measurements: SL 51, SW 13.</p> <p>Variation. None in the material examined apart from one female being 2.1 mm in length.</p> <p> <b>Hosts.</b> The species was reared from <i>Delottococcus aberiae</i> (De Lotto) (Hemiptera: Pseudococcidae) on hybrid grapefruit (<i>Citrus x paradisi</i>) (Rutaceae).</p> <p> <b>Distribution.</b> South Africa.</p> <p> <b>Type material.</b> Holotype ♀, South Africa, Limpopo province, 234518 m E 7357213 m S (= 23°52'28.5"S 30°23'34.7"E), 7.01.2017, ex <i>Delottococcus aberiae</i> (De Lotto) on <i>Citrus x paradisi</i>, Star Ruby (V. Martínez-Blay & J. Puig) (card-mounted). Paratypes 5 ♀ ♀ (4 card-mounted, 2 slide-mounted), 3 ♂ ♂ (2 card-mounted, 2 slide- mounted), same data as holotype; 1 ♀ (card-mounted), 1 ♂ (card-mounted), South Africa, Limpopo province, 238949 m E 7358974 m S (= 23°51'33.9"S 30°26'12.4"), 0 8.03.2017, ex <i>Delottococcus aberiae</i> (De Lotto) on <i>Citrus x paradisi</i>, Star Ruby (V. Martínez-Blay & J. Puig). Holotype and 3 paratypes deposited at NHM; 4 paratypes deposited at DEZA; 3 paratypes deposited at IAM-UPV. Sequences deposited in GenBank with the accession numbers: (Ang 001) MH 401216; (Ang002) MH 401217; (Ang004) MH 401218; (Ang005) MH 401219; (Ang006) MH 401220.</p> <p> <b>Comments.</b> Females of <i>A. aberiae</i> are similar to those <i>A. pseudococci</i> as defined in Trjapitsin <i>et al.</i> (2007) for body colour, pattern on scape, F1 having the base brown and the apex white, proportion of antennal segments. Apart from molecular evidence (see below and Fig. 18 for GenBank sequences examined), the two species can be separated by the proportion of HW and FV (2.6 in <i>aberiae</i>, 3.2 in <i>pseudococci</i>), forewing proportions (2.7x as long as wide in <i>aberiae</i>, 2.3x in <i>pseudococci</i>) and venation (MV distinctly longer than PMV and together longer than SV in <i>aberiae</i>, MV as long as PMV and together distinctly shorter than SV in <i>pseudococci</i>)</p>Published as part of <i>Guerrieri, Emilio & Cascone, Pasquale, 2018, Anagyrus Howard (Hymenoptera: Encyrtidae) parasitoids of the invasive Delottococcus aberiae (De Lotto) (Hemiptera: Pseudococcidae) from South Africa, with description of two new species, pp. 374-382 in Zootaxa 4531 (3)</i> on pages 376-378, DOI: 10.11646/zootaxa.4531.3.3, <a href="http://zenodo.org/record/2614738">http://zenodo.org/record/2614738</a>
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Composti volatili dell'oliva e loro variazioni in risposta all'attacco della mosca dell'olivo
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