Trouessartia mironovi Constantinescu

Constantinescu, Ioana Cristina, Chișamera, Gabriel, Pocora, Viorel, Stanciu, Cătălin & Adam, Costică, 2013, Two new species of feather mites (Acarina: Analgoidea) from the Moustached Warbler, Acrocephalus melanopogon (Passeriformes, Acrocephalidae), in Romania, Zootaxa 3709 (3), pp. 267-276: 272-275

publication ID

http://dx.doi.org/10.11646/zootaxa.3709.3.5

publication LSID

lsid:zoobank.org:pub:B0ECDDDE-7FDC-42F0-8190-2B40FE47F4A9

persistent identifier

http://treatment.plazi.org/id/03C787C0-FFF6-2C18-FF5A-FEEEFECEFC1F

treatment provided by

Plazi

scientific name

Trouessartia mironovi Constantinescu
status

sp. nov.

Trouessartia mironovi Constantinescu   sp. nov. ( Figs. 4–6 View FIGURE 4 View FIGURE 5 View FIGURE 6 )

Type material. Male holotype (ANA078), 5 male and 6 female paratypes (ANA079, ANA080) from Acrocephalus melanopogon   , ROMANIA: Tulcea, Danube Delta Biosphere Reserve, Letea, 23 September 2010, coll. I.C. Constantinescu.

Description. MALE (holotype, Figs. 4 View FIGURE 4 ). Idiosoma size excluding terminal lamellae length × width 372 × 195 (idiosomal size of 5 paratypes 370-385 × 190-200). Prodorsal shield 110 × 135, with long extensions produced laterally between bases of legs I and II, not fused laterally with scapular shields, surface with fine granular ornamentation. Setae si hair-like, 17 long, distance between them 60; setae se 115 long, distance between them 90. Humeral shields with setae c 2 and c 3 filiform, 27 and 23 in length respectively, cp setae 140 long. Hysteronotal shield entire, length × width 230 × 140, DHA (dorsal hysterosomal apertures) absent, lateral margins with deep hevily sclerotized incisions at level of trochanters III, surface with fine granular ornamentation. Distance between prodorsal and hysteronotal shields along median line 32. Setae d 1 present, apices of opisthosomal lobes contiguous, separated by slit-like terminal cleft 22 in lenght. Lamellae ovoid in general shape, their margins with 14 rounded festoons. Setae h 1 anterior to level of setae h 2. Epimerites I fused into a V, with pair of short and acute posterior extensions; basal parts of these epimerites with narrow sclerotized bands flanking bases of trochanters I. Rudimentary sclerites rEpIIa ovate. Epimerites IIIa and IVa well-developed, coxal fields IV almost closed. Genital apparatus ( Fig. 4 View FIGURE 4 C) situated between levels of trochanters III and IV, 28 × 12, aedeagus minute, epiandrium present. Genital setae g and coxal setae 4 a filiform, 16 and 19 long respectively, situated at same transverse level. Adanal suckers circular, 16 in diameter, distance between their centers 23. Adanal apodemes heavily sclerotized, extended to midlevel of trochanters IV, without apophyses and with lateral membranes. Translobar apodeme present. Legs ( Fig. 6 View FIGURE 6 ). Setae sR III filiform with acute apex ( Fig. 6 View FIGURE 6 C). Setae e on tarsus IV truncated, without discoid cap, seta d with discoid cap ( Fig. 6 View FIGURE 6 D).

FEMALE (paratype, Figs. 5 View FIGURE 5 ). Length of idiosoma including lamellar processes on lobar apices 425, width of idiosoma 160 (idiosomal size of other 5 paratypes 405-415 × 165-180). Prodorsal shield as in male, 90 in lenght, 115 in width, setae si filiform, 13 long, distance between them 60; setae se 65 long, distance between them 82. Humeral shields with setae c 2 and c 3 filiform, 38 and 20 long respectively; setae cp 105 long. Hysteronotal shield, length x width, 210 × 105, DHA (dorsal hysterosomal apertures) absent, setae d 1 present, lateral margins with deep and heavily sclerotized incisions at level of trochanters III, surface with fine granular ornamentation. Distance between prodorsal and hysteronotal shields along median line 59. Setae h 1 filiform, minute, about 5 long, positioned 16 anterior to level of setae h 2. Setae ps 1 about 5, positioned on dorsal opistosomal lobes, anterior to level of setae h 3, distance ps 1 –h 3 20. Lenght of macrosetae h 2 and h 3 205 and 150 respectively. Distance from setae h 2 to membranous lobar apices 82. Setae f 2 absent, supranal concavity ovoid, closed, separated from terminal cleft. Lenght of terminal cleft from its top to lobar apices 99, interlobar membrane occupying about ¼ of cleft. Spermatheca ( Fig. 5 View FIGURE 5 B) with thickened primary spermduct in proximal part, head of spermatheca cup-shaped and secondary spermducts thickened. Primary spermduct projecting from margin of interlobar membrane into terminal cleft, forming external copulatory tube about 5 long. Setae sR III filiform, with acute apex. Epimerites I fused into a U with slightly divergent anterior ends, bases of these epimerites with narrow sclerites flanking trochanters I. Epigynium bowshaped, length × width 24 × 58, setae 4 b (16) and genital setae g (8) situated near tips of epigynum, genital papillae situated between bases of these setae. Apodemes of egg-laying opening small and triangular in shape.

Differential diagnosis: Trouessartia mironovi Constantinescu   sp. nov. is readily distinguished from other know species by having an unique combination of characters within the genus: epimerites I are fused in both sexes, and epimerites IVa strongly elongate in male. The new species can not be arranged in any of seven species groups that have been previously established in the genus Trouessartia   .

Among all species of the genus this species seems to be closest to Trouessartia santosdiasi Till, 1953   from Lamprocolius corruscus   ( Sturnidae   ). Males of T. mironovi   and T. santosdiasi   have the following similarities of the hysteronotal shield: the lateral margins are notched at the level of trochanters III, the surface is without distinct lacunae, the dorsal hysterosomal apertures are absent, and dorsal setae d 1 are present. Ventrally, males have the translobar apodeme on the opisthosomal lobes, the apices of opisthosomal lobes are contiguous, separated by a narrow terminal cleft, the terminal lamellae are ovoid and their margins with rounded festoons.

Both sexes of T. mironovi   differ from those of T. santosdiasi   by having epimerites I fused and setae sRIII filiform (epimerites I are free, and setae sRIII are lanceolate in T. santosdiasi   ).

Males of the new species differ from T. santosdiasi   by the absence of lateral incision on the hysteronotal shield at the level of setae e 2, absence of apophyses on the adanal apodemes, epimerites IVa exceeding far beyond the level of setae 4 a. In males of T. santosdiasi   , the lateral incision of the hysteronotal shield at level of setae e 2 is present, two pairs of apophyses on adanal apodemes are present, and epimerites IVa do not exceed to the level of setae 4 a. Females of T. mironovi   differ from those of T. santosdiasi   by lack of lacunae on the posterior half of the hysteronotal shield and by the shape of spermatheca; in the first the secondary spermaducts are completely separated from the primary spermaduct ( Fig. 5 View FIGURE 5 B), while in the second species the secondary spermaducts are joined to primary spermaduct.

Etymology: This species is named in honour of Dr. Sergey V. Mironov (Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia) in recognition for his huge contribution in elucidating the taxonomy of feather mites.