Caddo agilis Banks, 1892

Prokopenko, Е. V. & Sergeev, М. Е., 2020, On northwestern distribution of the family Caddidae (Opiliones) in Asia, Far Eastern Entomologist 421, pp. 10-13 : 11-13

Caddo agilis Banks, 1892

Figs 1–7

MATERIAL EXAMINED. Russia: Primorskii Krai, Sikhote-Alin Biosphere Reserve,

natural landmark Blagodatnoe, upper part of Sukhoy stream, slopes of the Lysaya hill,

44.9987 o N, 136.5017 o E, 9–10.VII 2020, 5 ♀; natural landmark Abrek , hillside in Skrytaya river valley (45.0982 o N, 136.6908 o E), 3–5.VII 2020, 11 ♀, coll. M.E. Sergeev.

REMARKS. The morphological features of females from Primorskii Krai ( Russia), North

America and Japan are the same ( Figs 1–7 ). The specimens collected in North America are slightly larger than Japanese, and our material contains the smallest individuals ( Table 1).

The length of palp and legs of specimens from Primorskii Krai are given in Table 2.

DISRIBUTION. Russia: Primorkii Krai (first record), Kuril Islands, Sakhalin Island

(personal communication of A. Chemeris). – USA, Canada, Japan (Suzuki, 1958; Shear,

1975; Cokendolpher & Lee, 1993; Giribet & Kury, 2007; Groh & Giribet, 2015; Shultz &

Regier, 2009; Shultz, 2018).

HABITAT AND BIOLOGY. In the North America, Caddo agilis is usually found in very humid, densely shaded areas, such as ravines, and there is usually in mixed and coniferous ventral view, 4 – same, lateral view, 5 – palpus, lateral view, 6 – chelicerae, lateral view, 7 –

ovipositor.

mark Blagodatnoe, 8 – natural landmark Abrek. (Photo M.E. Sergeev).

forests. Specimens have also been taken from moss, from beneath logs and stones, from the trunks and the outside walls of buildings (Shear, 1975). In Japan, C. agilis lives in similar biotopes: in the deciduous broad-leaf forest with Sakhalin fir on tree trunks near the ground

(Suzuki & Tsurusaki, 1983). In the Sikhote-Alin Biosphere Reserve this species was found in the shaded stone slopes with rich leaf litter, moss and lichen ( Figs. 7 , 8 ). The harvestmen not moved actively over surfaces such as it was observed in Maryland (Shultz, 2018), but hidden under stones. This species is predominately parthenogenetic. Males are rare in most population in the North America (Shear, 1975) and Japan. In Hokkaido, the proportion of males in the population was only 1.3 % (Suzuki & Tsurusaki, 1983). No males were found in the Sikhote-Alin Reserve.

Figures

Figs 1–7. Caddo agilis female. 1 – alive specimen, 2 – body, dorsal view, 3 – same,

Figs 8, 9. Habitats of Caddo agilis in Sikhote-Alin Biosphere Reserve. 7 – natural land-