Arrup areolatus ( Shinohara, 1957 )

Published, First, 2007, The Mecistocephalidae of the Japanese and Taiwanese islands (Chilopoda: Geophilomorpha), Zootaxa 1396, pp. 1-84 : 16-17

Arrup areolatus ( Shinohara, 1957)

Figs. 9

[1] Nodocephalus areolatus Shinohara 1957 — Zool. Mag. Tokyo 66: 187 (original description); fig. 1

Nodocephalus areolatus: Murakami 1993 — List Species Anim. Japan 5: 105

Nodocephalus areolatus: Shinohara 1999 — Pictorial Keys Soil Anim. Japan: 709; fig. 6 (703)

Arrup areolatus: Foddai et al. 2003 — J. Nat. Hist. 37: 1262

Diagnosis. An Arrup species with body length reaching about 2 cm. Basal part of the medial projections of the first maxillae about 3 times as long as the distal lobe, with swollen internal margin. Distal article of the telopodite of the second maxillae without claw. Forcipular segment I with a well developed tooth, subtriangular, acute and projecting.

Type material. Holotype: female, about 18 mm long, adult. Paratypes: 2 juveniles ( Shinohara, 1957).

Type locality. ‘Okyô­daira (Chichibu)’, Honshu ( Shinohara, 1957).

Depository of type material. Coll. K. Shinohara ( Shinohara, 1957).

Material examined. None.

Description. Body size of adults reaching at least about 2 cm. Body colour yellow, head and forcipular segment deep orange. Head about 1.5 times as long as wide. Clypeal ratio about 3.5. Clypeal setae: about 12 pairs, including one median pair anterior to the plagulae and a group on each side reaching the anterior corner. Labrum: anterior ala triangular, medial margin reduced to a vertex; posterior margin of side­pieces almost straight. First maxillae: anterior corners of coxosternum not projecting; each medial projection with 3–4 spines on the internal margin and 2 setae at mid­length; basal part very large and distally rounded, about 3 times as long as the distal lobe; distal lobe emerging abruptly from the basal part, with an acute angle; each telopodite with 2 setae at mid­length, distal lobe attenuated. Second maxillae: article I of the telopodite about 2.5 times as long as wide, article III slender, about 4.3 times as long as wide; claw absent. Forcipules: article I about 1.5 times as long as wide, distal tooth acute, and distinctly projecting outwards; article II without teeth; article III with a tubercle; tarsungulum with one distinct basal tooth. Last leg­bearing segment: sternum semicircular; about 14 pores on each coxopleuron.

Distribution in the considered area.

Honshu: ‘Okyô­daira (Chichibu)’ [1] (type locality).

General distribution. Only known from the type locality.

Remarks. The unusual elongation of the distal article of the telopodite of the second maxillae, inferred from the original drawing, may represent a diagnostic character.