Paratrombium Bruyant, 1910

Sevsay, Sevgi, Buğa, Evren, Adil, Sezai, Received, İbrahim Karakurt, Online, Published & Version, Final, 2017, First records of the genus Paratrombium Bruyant, 1910 (Acari: Trombidiidae) from Turkey, Turkish Journal of Zoology 41 (4), pp. 737-743 : 737-741

Genus Paratrombium Bruyant, 1910

Type species Paratrombium egregium Bruyant, 1910

Paratrombium insulare ( Berlese, 1910)

Adults. Standard measurements in Table 1. Body length 1295–1710; width, 1014–1355. Crista metopica slightly widened, not clearly terminated in its anterior part, does not reach anterior margin of aspidosoma ( Figure 1 ). Opisthosomal setae; uniform, slightly thickened stem, narrowing towards tip, stem densely covered with long and short setulae ( Figure 2 ).

Deutonymphs. Standard measurements in Table 1. Setation sparser than in adults. Palptibia with at least 1 long eupathidium placed close to palptibial claw. Opisthosomal setae covered with relatively long and curved setulae. Two pairs of genital acetabula.

Larvae. Standard measurements in Table 2. Pedipalp formula 0–N–0–NNN–NNNωωζζζ ( Figure 3 ). Scutum widened anteriorly and great part of surface porous. Scutum covers more than half of dorsal side of body (in unengorged larvae); no distinct fold on both sides of symmetry axis. Anterior part of sclerite widened and longitudinally striated, covering almost half of scutum. Scutellum porous, with 1 pair of barbed setae ( Figures 4 and 5 ). f D formula: 2-2-6-4-4-2-2.

* Without anterior process.

**The numbers after the decimal point were not taken.

Specimens examined: 05 April 2014, 3 deutonymphs, Bayburt, Aydıntepe Plateau , 40°27′20″N, 40°06′50″E, elevation 2455 m a.s.l., litter from under Astragalus sp .; 01 May 2015, 2 deutonymphs, Bayburt, Demirözü vicinity, 40°09′10″N, 39°52′04″E, elevation 1676 m a.s.l., mossy soil (Leg. İ. Karakurt) ; 22 May 2013, 4 adults (rearing was only successful for 1 specimen; 28 larvae were obtained by experimental rearing), Erzincan, Ahmediye pond, 39°52′53″N, 39°20′31″E, elevation 1978 m a.s.l., mossy soil, close to the pond (Leg. S. Sevsay, S. Adil) ; 12 October 2013, 2 adults, Giresun, Kovancık village , 40°52′32″N, 38°51′30″E, elevation 94 m a.s.l., litter from under tea plants ; 17 May 2014, 1 adult, Gümüşhane, Örümcek Forest , 40°41′07″N, 39°03′08″E, elevation 780 m a.s.l., litter under rock and soil ; 16 July 2014, 1 deutonymph, Gümüşhane, Kadırga plateau, 40°42′28″N, 39°11′59″E, elevation 1245 m a.s.l., litter from under Abiyes sp .; 25 September 2014, 1 deutonymph, Giresun, Arzumlar burgh, 40°24′53″N, 39°40′13″E, elevation 1344 m a.s.l., mossy soil ; 10 September 2014, 2 adults, Gümüşhane, Araköy plateau, 40°38′41″N, 39°08′52″E, elevation 714 m a.s.l., litter from under hazelnut tree ; 16 April 2015, 2 adults, 2 deutonymphs, Gümüşhane, Kazıkbeli plateau, 39°48′25″N, 39°22′49″E, elevation 482 m a.s.l., litter from under hazelnut tree ; 14 May 2015, 1 adult, Gümüşhane, Vauk passage, 40°23′02″N, 39°46′43″E, elevation 1563 m a.s.l., litter from Salix sp .; 18 May 2015, 2 adults, 2 deutonymphs, Gümüşhane, Örümcek Forest , 40°41′07″N, 39°03′28″E, elevation 1110 m a.s.l., litter from under Abiyes sp. (Leg. S. Adil) .

Distribution. Algeria, Finland, Greece, Italy, Norway ( Mąkol and Wohltmann, 2012). New record for the Turkish fauna.

Remarks. The larval setal and morphological characters of Turkish specimens are a perfect match to the European specimens described by Mąkol (2000). The adult character states are also similar, and differed only slightly in measurements that do not seem significant due to great variation in postlarval stages.

Paratrombium megalochirum ( Berlese, 1910)

Adults. Standard measurements in Table 1. Body length is 1295–1710 and width 1014–1355. Posterior process of crista metopica distinctly widened, with no clearly marked termination ( Figure 6 ). Opisthosomal setae uniform, with thickened stem, covered with numerous long setulae; setulae the longest at proximal part of stem. Distal setulae shorter, passing beyond stem termination ( Figure 7 ).

Larvae. Standard measurements in Table 2. Pedipalp formula 0–N–0–NNN–NNωωζζζ ( Figure 8 ). Scutum covers more than half of dorsal side of body (in unengorged larvae); distinct fold present on both sides of symmetry axis, in posterolateral part of scutum. Anterior part of sclerite widened and longitudinally striated along border of AM setae. Scutellum almost as broad as scutum, porous ( Figures 9 and 10 ). f D formula: 2(2)2–6–4–4–2.

Specimens examined: 08 May 2014, 1 adult (50 larvae obtained under laboratory conditions), Erzincan, Ahmediye pond, 39°52′56″N, 39°20′31″E, elevation 2043 m a.s.l., mossy soil; 07 June 2014, 3 adults (rearing was only successful for 1 female; 21 larvae obtained under laboratory conditions), Erzincan, Ahmediye pond, 39°52′56″N 39°20′27″E, elevation 2033 m a.s.l., mossy soil (Leg. E. Buğa) .

Distribution. Austria, Bulgaria, France, Iran, Italy, Norway, Poland, Romania, San Marino, Spain, Switzerland, the Netherlands ( Mąkol and Wohltmann, 2012; Noei et al., 2015). New record for the Turkish fauna.

Remarks. Larvae of Turkish specimens are similar to the European specimens described by Robaux (1969) and repeated in Mąkol (2005). Only mean values are available for most measurements given by Robaux (1969). They are similar to our measurements, except that 1 normal seta on the palp tarsus is absent in larvae of the Turkish specimens.

Additionally, adults of Turkish specimens are similar to the European specimens given by Mąkol (2005). Some different measurements (body length and width, etc.) for the adults are considered insignificant, since great variation is common in postlarval stages. Adult morphometrics are considered unimportant; the size of idiosoma is not a good character to compare, as it changes due to the physiological state.

Acknowledgments

This study is supported by the Scientific Research Fund of Erzincan University (EÜBAP), project number FEN-A-210514-0076 and Scientific and Technological Research Council of Turkey (TÜBİTAK project number: 113Z094). We thank the 2 anonymous reviewers for their comments, which helped improve the manuscript.

Figures

Figures 1–5. Paratrombium insulare (Berlese). Adult: [1] Crista metopica; [2] Dorsal opisthosomal setae. Larva: [3] Palp tarsus; [4] Dorsal view; [5] Ventral view.

Figures 6–10. Paratrombium megalochirum (Berlese). Adult: [6] Crista metopica; [7] Dorsal opisthosomal setae. Larva: [8] Palp tarsus; [9] Dorsal view; [10] Ventral view.