Iotarphia magna Song & Ahn, 2021

Song, Jeong-Hun, Osborn, Andrew W. & Ahn, Kee-Jeong, 2021, A taxonomic review of the coastal genus Iotarphia Cameron (Coleoptera: Staphylinidae: Aleocharinae) with a description of new species based on morphological and molecular characters, Zootaxa 4920 (3), pp. 417-427 : 423-424

Iotarphia magna Song & Ahn sp. n.

( Figs. 2b , 4 )

Description. Length 4.0– 4.5 mm. Body black to reddish black; head black, abdomen almost black to reddish black, antennae and legs yellow, elytra yellow except for each lateral darker region ( Figs. 2b and 4b ). Head. Eye large, about 1.7 times as long as temples. Distance between a pair of pores longer than distance between pore and head lateral margin. Antennae about as long as head and pronotum combined; antennomere 4 longer than wide, 5–7 subquadrate, 8–10 slightly to distinctly transverse ( Fig. 4a ). Mouthparts. Labrum with α-sensillum about as long as ε-sensillum. Maxillary palpomere 2 about 2.8 times as long as wide, 3 about 3.0 times as long as wide. Labium with palpomere 1 about 2.5 times as long as wide, 2 about 1.3 times as long as wide, 3 slightly shorter than 1, about 2.3 times as long as wide. Mentum with 10+10 (or 10+11) macrosetae on each side of midline. Thorax. Metanotal scutum with 1 long seta and about 3–5 short setae on each side of midline. Mesoventral process rounded at apex, slightly longer than metaventral process, shorter than isthmus and metaventral process combined ( Fig. 4c ); isthmus distinctly shorter than metaventral process ( Fig. 4c ). Elytron approximately 1.8 times as long as wide ( Fig. 4b ), flabellum composed of about 9 setose lobes. Legs. Length ratio of tarsomeres 36:36:36:136 (front tarsus); 40:40:34:37:90 (middle tarsus); 48:48:36:36:103 (hind tarsus). Abdomen. Sternite VIII with about 6 macrosetae on each side of midline. Secondary sexual characteristics. Male sternite VIII with posterior margin apically rounded ( Fig. 4e ); female sternite VIII posterior margin triangularly produced apically and pointed medially ( Fig. 4f ). Median lobe as in Figs. 4g and 4h . Spermatheca as in Fig. 4i .

Type material. Holotype: ³, labeled as follows: “AUS: Cloudy Bay , Bruny Is, SE Tas, A.W. Osborn 10.vi.2018, QVM:2018:12:0738; HOLOTYPE Iotarphia magna Song and Ahn 2019 ”. Designed by J.-H. Song and K.-J. Ahn 2020 (deposited in QVMAG) . Paratypes: 3³ 4♀, same data as holotype (3 in QVMAG and 4 in CNUIC), 3³ QVM:2018:12:0714, 0722, 0736, 0738 (2 in QVMAG and 1 in CNUIC; 4♀ QVM:2018:12:0704, 0708, 0735, 0743 (2 in QVMAG and 2 in CNUIC).

Other material. DNA voucher specimens: 2³ 3♀, Australia, Tasmania: 1³ Cloudy Bay, Bruny Is, SE Tas, A.W. Osborn 10.vi.2018, QVM :2018:12:0731, CNUIC0650 ; 1³, QVM:2018:12:0719, CNUIC0651 ; 1♀, QVM:2018:12:0728, CNUIC0648 ; 1♀, QVM:2018:12:0745, CNUIC0649 ; 1♀, QVM:2018:12:0709, CNUIC0652.

Distribution. Australia (Tasmania).

Etymology. The name of this species is formed from the Latin adjective magna meaning large, referring to the relatively large body of this species.

Remarks. See Table 5 for the similarities and differences among three Iotarphia species.

Figures

FIGURE 2. Habitus photography. (a) Iotarphia australis Cameron, 2.3 mm; (b) Iotarphia magna Song and Ahn, sp. n., 4.0 mm.

FIGURE 4. Iotarphia magna sp. n.: (a) antenna; (b) right elytron, dorsal view; (c) meso- and metaventrites, ventral view; (d) male abdominal tergite VIII, dorsal view; (e) male abdominal sternite VIII, ventral view; (f) female abdominal sternite VIII, ventral view; (g) median lobe, ventral view; (h) median lobe, lateral view; (i) spermatheca, scales = 0.1 mm.