Halolaelaps coulsoni Gwiazdowicz & Teodorowicz 2017, n. sp.

• Main Authors: Gwiazdowicz, D. J., Teodorowicz, E.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Mesostigmata; Halolaelapidae; Halolaelaps; Halolaelaps coulsoni; Arctic; Pyramiden; Spitsbergen
• Online Access: https://doi.org/10.5281/zenodo.4697205; http://treatment.plazi.org/id/27302249F3342A0A6E5DFE38398A2A1A

Halolaelaps coulsoni n. sp. Zoobank: A137B515-F6D2-4DCF-8AB7-1B325D60923B Specimens examined — Holotype . Female. Spitsbergen, Pyramiden (78°40’N, 016°27’E), kittiwake nest detritus, July 16 2012, coll. S.J. Coulson and D.J. Gwiazdowicz; Paratypes : in the same location and date as holotype, two deutonymphs, coll. S.J. Coulson and D.J. Gwiazdowicz; three females, one deutonymph, four males in the same location, September 13 2012, coll. S.J. Coulson and A. Sjöblom. Female (n=4), idiosoma oval, 690 – 730 µm in length and 430 – 450 µm in width. Dorsal idiosoma — On dorsal side two shields of irregular edges - podonotal length 280 – 310 and width 340 – 380 µm and opisthonotal (280 – 310 × 300 – 340 µm) (Fig. 1A). Podonotal shield bearing 22 – 23 pairs of simple setae (6 per row "j", "z" and "s", and 4 or 5 setae in row "r"). Accordingly opisthonotal shield - usually with 14 pairs of simple setae. The total number of setae on both shields varies and this fact has been underlined in the section "Morphological variation". Lengths of setae on podonotal shield also vary, for example, that of "j" row are median in length (25 – 28 µm), while posterior setae in rows "z" and "s" (z5, z6, s5, s6) are noticeably longer (47 – 50 µm). The shortest are z1 (7 – 11 µm). Fine areolate ornamentation covers the shield in the area between "j" and "z" rows. Opisthonotal shield with a characteristic irregular incision in the middle (45 – 55 µm), starting from the anterior edge and running between setae J1-J1 and J2-J2. Similar to setae on podonotum, setae on opisthonotum differ in length e.g. J1-J3 are shorter (34 – 38 µm), slightly longer are J5, Z1, Z2 (41 – 45 µm), and the longest are Z4, S4 (57 – 58 µm). The anterior part of the shield between setae J1, Z1, S1 and J2, Z2, S2 is covered with delicate areolate ornamentation. Ventral idiosoma — Tritosternum with elongate trapezoidal base (25 – 28 µm) and fine lightly pilose laciniae (42 – 47 µm) (Fig. 2A). A pair of lightly sclerotized pre-sternal plates fused with sternal shield. ...