Abstract
Eight specimens of a scolopendromorph centipede collected in Tokashiki Island and Minamidaito Island (both in the Ryukyu Islands, Japan) represent the first record of Cryptops (Cryptops) navis Chamberlin, 1930 from the islands of the Far East (i.e., Japanese Archipelago, Ryukyu Islands and Taiwan). This material also provides new details of the morphological variability of C. (C.) navis and the first data on natural habitats of C. (C.) navis, which previously was known only from soil samples from Singapore and China.
Highlights
The scolopendromorph genus Cryptops Leach, 1814 comprises more than 170 species described worldwide (Bonato et al 2016) that have been classified into four or five subgenera (Vahtera et al 2013; Lewis 2016). Lewis (2011) has divided Cryptops sensu stricto into two groups based on the presence of an anterior transverse suture on tergite 1
Cryptops (C.) nigropictus belongs to the hortensis group (Lewis 2011), and C. (C.) japonicus to the doriae group (Lewis 2013), while C. (C.) striatus belongs to the group that possesses an anterior transverse suture on tergite 1
The examined specimens were identified as Cryptops (Cryptops) navis based on the following features: 2 + 1 + 2 clypeal setae, one saw tooth on ultimate leg femur and ultimate leg tibia with bifid distal saw tooth, and locomotory legs with a single and comparatively long pretarsal accessory spine (Chamberlin 1930, 1940; Lewis 2013)
Summary
The scolopendromorph genus Cryptops Leach, 1814 comprises more than 170 species described worldwide (Bonato et al 2016) that have been classified into four or five subgenera (Vahtera et al 2013; Lewis 2016). Lewis (2011) has divided Cryptops sensu stricto into two groups based on the presence of an anterior transverse suture on tergite 1. Lewis (2011) has divided Cryptops sensu stricto into two groups based on the presence of an anterior transverse suture on tergite 1. This author divided the group lacking this suture into two species groups, doriae and hortensis, based on the presence of one or more saw teeth on the ultimate leg femur. Three species of Cryptops sensu stricto have been recorded from the Japanese Archipelago, the Ryukyu Islands, and Taiwan (islands of the Far East): C. (C.) japonicus to the doriae group (Lewis 2013) (both having tergite 1 without sutures), while C. (C.) striatus belongs to the group that possesses an anterior transverse suture on tergite 1. In the Ryukyu Islands, all three species were recorded from a montane region of the Okinawa Island (Ômine and Itô 1998)
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