Alaptus globosicornis Girault, 1908

Serguei V. Triapitsyn, 2017, Revision of Alaptus (Hymenoptera: Mymaridae) in the Holarctic region, with taxonomic notes on some extralimital species, Zootaxa 4279 (1), pp. 1-92 : 22-26

Alaptus globosicornis Girault, 1908

( Figs 33–41 )

Alaptus globosicornis Girault 1908: 188 –189, 193 (key). Type locality: Orlando , Orange Co., Florida, USA.

Leimacis peregrina Perkins 1910: 661 . Type locality: Honolulu, Oahu Island, Hawaiian Islands ( USA: Hawaii). Syn. n.

Alaptus globosicornis Girault: Girault 1911a : 132 (specimen from the Hawaiian Islands); Girault 1913b: 10 –11 (distribution, discussion); Timberlake 1924: 447 (specimens from the Hawaiian Islands, host association); Girault 1929: 9 (key); Peck 1963: 27 –28 (catalog); De Santis 1983: 32 (catalog); Lin et al. 2007: 21 (list); Guzmán-Larralde et al. 2017: 8 (list).

Alaptus globosicornis variety hawaiiensis Girault 1912: 124, 126 (key). Holotype female [ QMBA] (not examined). Type locality: Honolulu , Oahu Island, Hawaiian Islands (Hawaii, USA). Syn. n.

Leimacis peregrina Perkins : Girault 1913b: 11 (mentioned).

Alaptus globosicornis hawaiensis [sic] Girault: Soyka 1939b: 31 (list).

Alaptus ? globosicornis Girault : Doutt 1973: 222 (fossil records); Beardsley & Huber 2000: 7 (references in the Hawaiian Islands, discussion, distribution, host association).

Arescon peregrina (Perkins) : Beardsley & Huber 2000: 11 (nomen dubium: references, history, discussion). Alaptus peregrinus (Perkins) : Triapitsyn 2016: 150 –151 (nomen dubium: discussion).

Type material examined. Alaptus globosicornis Girault : lectotype female [USNM], here designated to avoid ambiguity regarding the identity of this species and status of its type specimens, on slide ( Fig. 35 ) labeled: 1. “Morrill No. 2008 Bred from Purple scale. VIII, 10, 1907 Alaptus globosicornis Girault E. A. Back. ”; 2. “Mymarid. Type ♀. globosicornis ”; 3. [red] “ Alaptus globosicornis Girault ”; 4. [red] “ Type no. 11858 U.S.N.M.”; 5. [USNM barcode] “USNMENT 01049133”. The lectotype ( Fig. 33 ), mounted under the same slide with 2 female paralectotypes, is the only specimen with both antennae intact; it is in fair condition, complete, poorly mounted more or less dorsoventrally. Paralectotypes: the above-mentioned females on the lectotype slide even though Girault (1908) mentioned only 2 females of this species as “Types”; it is now impossible though to figure out which two of the three specimens on this slide he considered as such.

Alaptus peregrinus (Perkins) : lectotype female of Leimacis peregrina Perkins [ BMNH], here designated to avoid uncertainty about the identity of this species and status of its type specimen(s), on slide ( Fig. 37 ) labeled originally: 1. “ Leimacis . Honolulu on window. Sic. [apparently: illegible] F.H. peregrina P. [in pencil]”; 2. [ BMNH accession number, apparently for the entire R.C.L. Perkins’ collection] “R.C.L. Perkins Coll. B.M.1955-742”; 3.

[in India ink on glass] “ Alaptus sp.”. The lectotype ( Figs 38, 39 ) is in fair condition although lacking one fore wing, with the head plus antennae detached from the rest of the body. This specimen fits most of the features mentioned in the very vague original description (in which sex of the specimens(s) was not mentioned but obviously female was described because the antenna was “8-jointed”) except for a slightly larger body length (about 0.3 mm versus 0.25 mm), F2 not being “more slender” than F3, the fore wing disc having only a line of two setae rather than “three or four hairs”, and the marginal vein of the fore wing being normal for the genus and not “long”. But it is from the type locality and definitely came from the R.C.L. Perkins’ collection, and it is unlikely to be part of the specimens of Alaptus collected around 1905 by F.W. Terry at the Oahu Sugar Co. which apparently were marked with “F’ numbers ( Beardsley & Huber 2000). Until discovery of this slide in the BMNH, type material of this species was considered to be lost ( Beardsley & Huber 2000; Triapitsyn 2016).

Material examined. USA: FLORIDA, Orlando, 4.xii.1953, K.M. Sommerman (“ex liposcelis Cult.” [i.e., Liposcelis sp. culture]) [6 ♀, USNM]. PENNSYLVANIA, Montgomery Co., Lansdale, 40°14’12’’N 75°18’47’’W, 19–26.viii.2000, R. Kaufhold [1 ♀, UCRC]. TEXAS: Brazos Co., College Station, Texas A&M University, 23.viii.1984, S. Ostrowska (in “ B.[emizia] tabaci culture”) [1 ♀, UCRC]. Upshur Co., Gilmer, 19.ix.1936, H.J. Crawford (on croton) [1 ♀, USNM].

Extralimital material examined. BRAZIL: AMAZONAS, Manaus , xii.1981, “ Col. Castelo ” [? M. Castelo Branco] (“s/pez seco y salado”—on dry and salted fish) [3 ♀, 2 ♂, MLPA] . HAWAIIAN ISLANDS: USA, HAWAII : Hawaii Island, Hakalau (former “ Hakalau Plantation ”), v.1914 [1 ♂, BPBM] . Oahu Island, Honolulu, Diamond Head [ State Monument ], 21.x.1916, P.H. Timberlake (“ Reared from Oleander material infested with coccids & psocids”) [1 ♀, UCRC] . Also all the specimens in BPBM listed by Beardsley & Huber (2000) as A.? globosicornis ; here I confirm their identity as belonging to this species, at least for the females. Most of the tentatively identified males were captured during the same collecting events with the presumably conspecific females.

Redescription. FEMALE (lectotype of A. globosicornis ). Body brown, appendages light brown except flagellum brown.

Antenna ( Fig. 34 ) a little shorter than body; scape (including radicle) 3.5× as long as wide, almost smooth; funicle very short, F1 much shorter than pedicel and the shortest funicle segment, following funicle segments each slightly longer than the preceding one, F2 about 0.75× as long as wide, F3–F5 globular, F5 the widest funicle segment; clava 2.8× as long as wide, apparently with 4 mps, a little longer than funicle.

Fore wing ( Fig. 36 ) 10.7× as long as wide; disc almost hyaline and bare except for 1 seta and the admarginal rows; longest marginal seta about 4.8× maximum wing width. Hind wing about 16× as long as wide; disc with 1 incomplete row of setae; longest marginal seta about 7.3× maximum wing width.

Ovipositor barely exserted beyond apex of gaster, occupying about 0.7× its length, and about 1.0× length of metatibia.

Measurements of the lectotype (µm). Body 245; head 75; mesosoma 88; gaster 97; ovipositor 97. Antenna: scape (including radicle) 61; pedicel 27; F1 9; F2 10; F3 12; F4 14; F5 16; clava 77. Fore wing 257:24; longest marginal seta 115. Hind wing 239:15; longest marginal seta 109.

Variation. Paralectotypes: body length 230–240 µm; scape 3.3× as long as wide; clava 2.9× as long as wide; fore wing 10.1× as long as wide, disc with 1 or 2 setae in a median row. Non-type specimens from the continental USA: body length 290–320 µm; clava 2.6× as long as wide; fore wing about 10.0× as long as wide, disc with 1 or 2 setae in a median row. Lectotype of Leimacis peregrina and non-type specimens from the Hawaiian Islands: body length 220–340 µm; scape about 3.3× as long as wide; clava 2.8–3.0× as long as wide, occasionally about as long as funicle; fore wing 10.1× as long as wide, disc with 0, 1 or 2 setae in a median row.

MALE. Known from specimens (e.g., Fig. 40 ) from the Hawaiian Islands ( Beardsley & Huber 2000) but their pertinence to this species needs verification (they might be easily confused with those of A. iceryae Riley in which F2 is also very short). Body length 210–280 µm. Antenna ( Fig. 41 ) with scape about 4.0× as long as wide, flagellar segments short, F2 notably shorter than F1 or F3. Fore wing 8.6–9.1× as long as wide; disc without or with 1 seta in the middle. Gaster at most a little longer than mesosoma; genitalia length 55 µm.

Diagnosis. Female of A. globosicornis is distinctive due to its antenna ( Fig. 34 ) with F1 and F2 very short and F3–F5 globular.

Distribution. Nearctic: USA; Neotropical: Brazil ( De Santis 1983) and Mexico (fossil—in amber, Doutt 1973; De Santis 1983; Guzmán-Larralde et al. 2017); Oceania: Hawaiian Islands ( Girault 1911a). Records from Australasia (Queensland, Australia) by Girault (1912) as A. globosicornis variety hawaiiensis need confirmation as they may belong instead to A. australiensis Girault , stat. n.

Hosts. Liposcelis bostrychophila Badonnel , L. divinatoria (Müller) ( Timberlake 1924; Noyes 2016), and Liposcelis sp. ( Liposcelididae ).

Figures

FIGURES 33 – 36. Alaptus globosicornis ♀ (lectotype). 33, habitus; 34, antenna; 35, slide; 36, fore wing.

FIGURES 37 – 39. Alaptus globosicornis ♀ (lectotype of Leimacis peregrina). 37, slide; 38, head and antennae; 39, remainder of body.

FIGURES 40 – 41. Alaptus? globosicornis ♂. 40, habitus (Honolulu, Oahu Island, Hawaiian Islands [USA: Hawaii]); 41, antenna (Hakalau, Hawaii Island, Hawaiian Islands).