Arctigalloisiana, Nakahama & Yamasaki & Komazawa & Nakano, 2023

Nakahama, Naoyuki, Yamasaki, Takeshi, Komazawa, Masaki & Nakano, Takafumi, 2023, Integrative approach clarifies the distinct taxonomic account of gryloblattids endemic to Hokkaido, Japan, with a description of two new species (Insecta, Grylloblattodea), Zoologischer Anzeiger (Zool. Anz.) 302, pp. 17-27 : 20-22

3.3.1. Arctigalloisiana gen. nov.

urn:lsid:zoobank.org:act:E0C52FF1-641A-4544-B7FB-939D13AF72C1

Type species. Galloisiana yezoensis Asahina, 1961 .

Diagnosis. Arctigalloisiana gen. nov. is very close to Galloisiana , but can be distinguished from the latter by a macrotrichia-less margin of the cervical sclerite ( Figs. 4D , 5D and 7D , 8D ), one pair of setae on the postmentum ( Figs. 4C , 5C and 7C , 8C ), and poorly developed tarsal pulvillus ( Fig. 4F ).

Description. Antennomere number varying from 28 to 34. Third antennomere relatively short (Ant3L/Ant2L 1.2–1.7). Compound eye black. Lacinia with two teeth. Postmentum with a pair of setae. Outer margin of cervical sclerite without macrotrichiae. Pronotum with convex posterior margin; transverse sulcus at anterior margin convex or sometime straight. Cercal nine or ten segmented; length of each segment not stable among individuals. Ovipositor long, from 1.1 to 1.5 times longer than pronotum.

Etymology. The generic name is a compound noun derived from the Latin word, Arctus (Ursa Major/Minor = north; from αρκτος), and Galloisiana (feminine), referring to the fact that this genus is endemic to Hokkaido, which is the northernmost main island in the Japanese Archipelago.

Species included. Arctigalloisiana yezoensis comb. nov., A. poropnetopa sp. nov., A. yubariensis sp. nov.

Remarks. Schoville et al. (2013) shows a result in which the clade of “ Galloisiana ” yezoensis is separated from another Galloisiana clade including the type species, Galloisina nipponensis . Our phylogenetic tree also supports the independence of “ Galloisiana ” yezoensis . Here we establish a new genus, Arctigalloisiana gen. nov., for “ Galloisiana ” yezoensis and its relatives.

Keys to species (Female)

1.DV/PL less than 1.20 (the ovipositor short) —————————————————————————————— A. yezoensis comb. nov.

-. DV/PL more than 1.20 (the ovipositor long) ————————————————————————————————————————2

2. Ant3L/Ant2L more than 1.50 (the antennomere 3rd long) —— A. poropnetopa sp. nov.

-. Ant3L/Ant2L less than 1.50 (the antennomere 3rd short) — A. yubariensis sp. nov.

Figures

Fig. 4. Arctigalloisiana yezoensis, female (B2-407738). (A) Head and Pronotum, dorsal view. (B) same, lateral view. (C) head, ventral view. (D) cervical sclerite, ventral view. (E) left antenna, dorsal view. (F) tarsal pulvillus of anterior leg, ventral view. (G) ovipositor, dorsal view. (H) same, lateral view. Scales: 1 mm.

Fig. 5. Arctigalloisiana yezoensis, male (B2-407735). (A) head and pronotum, dorsal view. (B) same, lateral view. (C) head, ventral view. (D) cervical sclerite, ventral view. (E) left antenna, dorsal view. Scales: A–D, 1 mm; E, 0.5 mm.

Fig. 7. Arctigalloisiana poropnetopa sp. nov., holotype female (B2-407746). (A) head and pronotum, dorsal view. (B) same, lateral view. (C) head, ventral view. (D) cervical sclerite, ventral view. (E) left antenna, dorsal view. (F) ovipositor, dorsal view. (G) same, lateral view. Scales: A–D, F–G, 1 mm; E, 0.5 mm.

Fig. 8. Arctigalloisiana yubariensis sp. nov., holotype female (B2-407748). (A) head and pronotum, dorsal view. (B) same, lateral view. (C) head, ventral view. (D) cervical sclerite, ventral view. (E) left antenna, dorsal view. (F) ovipositor, dorsal view. (G) same, lateral view. Scales: A–D, F–G, 1 mm; E, 0.5 mm.