Iotarphia australis Cameron, 1943

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 : 421-422

Iotarphia australis Cameron

( Figs. 2a , 3 )

Iotarphia australis Cameron 1943: 352 .

Psammopora delittlei Pace 2003: 157 (as valid species); synonymized by Lee & Ahn, 2015: 766.

Redescription. Length 2.2–3.0 mm. Body reddish brown to black ( Fig. 2a ); head, pronotum and abdominal segments or tergites III–V reddish brown, antennae and legs yellow, elytra yellow except for basal darker region ( Fig. 2a ). Head. Eye slightly large, about 1.1 times as long as temple. Distance between a pair of pores subequal to distance between pore and lateral margin of head ( Fig. 3b ). Antennae longer than head and pronotum combined; antennomere 4 almost quadrate, 5–7 subquadrate, 8–9 transverse, 10 strongly transverse ( Fig. 3a ). Mouthparts. Labrum with α-sensillum longer than ε-sensillum. Maxillary palpomere 2 about 2.8 times as long as wide, 3 about 2.8 times as long as wide. Labium with palpomere 1 about 3.1 times as long as wide, 2 about 1.4 times as long as wide, 3 distinctly shorter than 1, about 3.5 times as long as wide. Thorax. Metanotal scutum with 1 long seta and about 2–3 short setae on each side of midline. Mesoventral process weakly pointed at apex, shorter than metaventral process ( Fig. 3c ); isthmus distinctly shorter than metaventral process ( Fig. 3c ). Elytron approximately 1.6 times as long as wide, flabellum composed of about 7 setose lobes. Legs. Length ratio of tarsomeres 36:34:42:109 (front tarsus); 40:44:46:32:92 (middle tarsus); 48:35:36:31:86 (hind tarsus). Secondary sexual characteristics. Male sternite VIII with about 7–8 macrosetae on each side of midline, posterior margin triangular, convex and long marginal setae present ( Fig. 3e ); female sternite VIII with 7–8 macrosetae on each side of midline, posterior margin rounded ( Fig. 3f ). Median lobe as in Figs. 3g and 3h . Spermatheca as in Fig. 3i .

Material examined. AUSTRALIA: New South Wales: 2³ 2♀, Port Macqurie Oxley & Flynns Beach , 30 XII 2002, MJ Jeon . 1♀, Staphylinidae, Lighthouse Bay, Bruny Is, TAS, A.W. Osborn , 24. ix. 2014, QVM : 2014:12:0125 ( NOTE: TAS 1 st Col.), CNUIC0653 ; 1³ 1♀, Australia, NSW, South Duress Beach , 09 I 2002, J. S. Ashe, ex under seaweed, CNUIC0654–0655 ; 1³, Australia, NSW, Port Macqurie Oxley & Flynns Beach, 30 XII 2002, M.-J. Jeon, CNUIC0656 ; 1³ 1♀, Australia, NSW, Newcastle , 27 I 2002, M.J. Jeon, ex under seaweeds, CNUIC0657–0658 .

Distribution. Australia (New South Wales and Tasmania)

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 3. Iotarphia australis: (a) antenna; (b) head, 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.