Crenitis (Crenitis)

Jia, Fenglong, Tang, Yudan & Minoshima, Yûsuke N., 2016, Description of three new species of Crenitis Bedel from China, with additional faunistic records for the genus (Coleoptera: Hydrophilidae: Chaetarthriinae), Zootaxa 4208 (6), pp. 561-576 : 570

Crenitis (Crenitis) sp.

( Figs. 42–49 , 52 , 63–66 )

Material examined: CHINA: Yunnan: 1 male ( SYSU), CHINA: Yunnan Prov., Baoshan / City, Baihualing, Jiujiezi, 25°18′N 98 °47′E, 2016m / 19.iv.2015, Renchao Lin & / Yudan Tang leg.

Discussion. The examined specimen has the following characters: length 2.8 mm, width 1.4 mm. Head blackish brown, pronotum and elytra dark brown. Head entirely with microsculpture. Pronotum with indistinct submarginal impression and more or less distinct submedian impressions, with strong microsculpture laterally. Pronotal punctures evenly distributed. Elytra with nine distinct series of punctures from base to apex (first series of punctures completely fused with sutural stria, only detected on basal third where sutural striae disappeared) ( Fig. 42 ). Mesoventrite with a transverse ridge ( Figs. 49 , 64 ). Metafemora glabrous ( Figs. 43 , 66 ), with pubescence on extreme base ( Fig. 66 ). Parameres broad, not incised laterally, with outer margin strongly curved subapically, more or less truncate apically. Median lobe gradually narrowed from base to anterior sixth, and then widened subapically, with a projection apically ( Fig. 52 ).

Judging from the description of Hebauer (1994), this specimen is most similar to C. nepalensis Hebauer, 1994 , a species which was not examined in this study. Therefore, the specimen is regarded as unidentified species.

Figures

FIGURES 42 – 49. Crenitis sp.: 42 – 44: Habitus (42; dorsal view, 43: ventral view, 44: lateral view); 45: head and pronotum, dorsal view; 46: head and prosternum, ventral view; 47: pronotum, lateral view; 48: abdomen, ventral view; 49: meso- and metaventrite, ventral view.

FIGURES 50 – 55. Aedeagi, dorsal view. 50: Crenitis aduncata sp. nov.; 51: C. lianggeqiui sp. nov.; 52: Crenitis sp.; 53 – 54: C. convexa Ji et Komarek (53: from Chongqing, 54: from Ningxia); 55: C. apicalis (Reitter).

FIGURES 63 – 72. SEM photographs. 63 – 66: Crenitis sp., ventral view (63: labrum and mentum, 64: mesoventrite, 65: metaventrite, 66: metafemur); 67 – 69: C. convexa Ji et Komarek, ventral view (67: labrum and mentum, 68: antenna and maxillary palpus, 69: metafemur); 70 – 72: C. apicalis (Reitter) (70: labrum and mentum, 71: antenna and maxillary palpus, 72: metafemur)