Discoxenus kakizoei Kanao & Maruyama, 2015, n. sp.
Creators: name: Kanao, Taisuke
name: Maruyama, Munetoshi
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Discoxenus
Discoxenus kakizoei

description: Discoxenus kakizoei n. sp.
(Figs. 15, 16, 137–148)
Type materials. Holotype: ♀, Bayon, Ankor Thom, Siem Reap, Cambodia, 20 VIII 2012, Maruyama M. leg. (Colony no. MMCB-T-2012-2-009) (abdominal segments VIII–X dissected off).
Paratypes: 1♀, North Wall of Preah Khan, Siem Reap, Cambodia, 19 VIII 2012, Maruyama M. leg. (Colony no. MMCB-T-2012-2-005) (completely dissected). 2♀♀, 0.76 km NE of Preah Kham, Siem Reap, 19 VIII 2014, Kakizoe S. leg. (Colony no. SK007).
Diagnosis. This species is distinct, and is distinguishable from other Discoxenus species by a combination of the following three character states: right mandible with a distinct and blunt tooth (Fig. 141), macrochaetotaxy of abdominal tergites III–VIII (6, 6, 6, 6, 6, 6), and spermatheca with the basal part being shorter than the apical part (Fig. 148).
Description. Head (Fig. 137) approximately 1.4 times wider than long. Antenna (Figs. 15, 16, 138) with segment I rectangular; segment II as long as segment III, with 4 macrosetae; segment III short, trapezoidal; segment IV transverse, wider than other segments; segments V–XI successively narrowed distally; segments V– VI wider than long; segment VII subquadrate; segments VIII–X longer than wide; segment XI approximately 2.6 times longer than wide. Labrum (Fig. 139, left side) with anterior margin deeply concave at middle; median projection of apodeme with posterior margin truncate; 3 lateral setae present in ventral view (Fig. 139, right side). Mandibles (Figs. 140, 141), covered with 30–40 pores. Left mandible (Fig. 140) with adoral margin moderately convex at apical third. Right mandible (Fig. 141) with a tooth broadly convex at middle of adoral margin, rounded apically. Maxillary palpal segment III approximately 2.3 times longer than wide. Mentum (Fig. 142) approximately 3 times wider than long, covered with around 50 pores. Labium with prementum covered with approximately 16 pores.
Pronotum (Fig. 143) covered with approximately 44 macrosetae, 6 minute setae present around anterior margin. Elytron (Fig. 144) transverse, sparsely covered with several setae at anterolateral outer corner, 12 macrosetae present on disc. Metaventrite approximately 1.7 times as long as mesoventrite.
Tergites III–VI (Fig. 15) with 1–2 setae laterally. Tergite VII with a row of 5–6 setae subapically. Tergite VIII (Fig. 145) with posterior margin pointed, 3 pairs of macrosetae present at posterior margin, with 2 pairs of macrosetae around middle. Macrochaetotaxy of abdominal tergites III–VIII = 6, 6, 6, 6, 6, 6. Sternite III (Fig. 16) with posterior half densely covered with setae. Sternites IV–V with posterior half sparsely covered with setae. Sternites VI–VII with a row of yellow setae at middle. Sternites III–VII with 6–10 macrosetae at posterior margin.
Male. Unknown.
Female. Sternite VIII (Fig. 146) with 2 pairs of macrosetae at posterior margin and middle. Spermatheca (Fig. 148) with apical part longer than basal part.
Measurement. Body length = average 1.82 mm (N = 1), pronotal length = average 0.60 mm (0.58–0.62 mm, N = 2), pronotal width = average 0.85 mm (0.83–0.86 mm, N = 2), elytral length = average 0.44 mm (0.43–0.45 mm, N = 2), elytral width = average 0.50 mm (0.49–0.51 mm, N = 2.
Etymology. The specific epithet is named after Mr. Shotaro Kakizoe of Kyushu University, who collected and kindly provided the specimens of this rare species.
Host species. Hypotermes makhamensis Ahmad, 1965.
description: Published as part of Kanao, Taisuke & Maruyama, Munetoshi, 2015, Eight new species, a new record, and redescription of the genus Discoxenus Wasmann, 1904: The first record of termitophilous rove beetles in Cambodia (Coleoptera: Staphylinidae: Aleocharinae), pp. 201-223 in Zootaxa 4044 (2) on pages 218-219, DOI: 10.11646/zootaxa.4044.2.2, http://zenodo.org/record/241241