Carpophilus (Myothorax) imitatus, Semeraro & Blacket & Rako & Cunningham, 2023

Semeraro, Linda, Blacket, Mark J., Rako, Lea & Cunningham, John Paul, 2023, The pest sap beetle Carpophilus Myothorax truncatus Murray, 1864 (Coleoptera Nitidulidae) - a new synonymy and a related new species of Carpophilus, Zootaxa 5301 (1), pp. 51-74 : 64-68

Carpophilus (Myothorax) imitatus sp. nov.

( Fig. 7 )

Type material. Holotype ♁, Australia, New South Wales, Kyalite , Feb 2018, from pheromone trap in pistachio orchard VAITC No. 8602 ( VAIC).

Paratypes - New South Wales: 1♁ same data as Holotype, VAITC 8601 ( VAIC); 2♀ same data as Holotype, VAITC 8603 , 8604 ( VAIC); S outh Australia: 1♁ Pinnaroo , Feb 2018, from pheromone trap in pistachio orchard, VAITC 8225 ( VAIC); 3♀ Pinnaroo , Feb 2018, from pheromone trap in pistachio orchard, VAITC 8606 , 8607 , 8608 ( VAIC); 2♀ Paringa , 10 Feb 2016, from pheromone trap in almond orchard, VAITC 6739 & 6740 ( VAIC).

Diagnosis

A small species around 2.0– 2.4 mm in length, uniformly brown, with fine pitting on pronotum; prosternum distinctly pitted and hypomeron weakly pitted. Male specimens with metatibia constricted along basal ¼ to 1/3; male paramere roundly truncate at apex.

Description

(n= 10 specimens examined, 3 ♁, 7 ♀)

Body, length (2.0– 2.4 mm); lateral margins parallel to subparallel; dark (chestnut) brown, unicolorous; setae on body, golden.

Head. Length of 3 rd antennomere 1x (or less) length of 2 nd antennomere; male mandibles symmetrical.

Thorax. Prothorax. Shape of pronotum laterally slightly convex (subparallel), anterior angles rounded, posterior angles not toothed but more or less forming a right angle with a rounded apex; width of pronotum around 1.3 to 1.5x times length; pitting on disc of pronotum relatively fine, usually separated by around one diameter but more widely separated along the medial line, particularly in the posterior half; prosternum with distinct pitting, lateral margins very slightly divergent towards posterior margin ( Fig. 7C ); prosternal process, slightly narrower at the base than the apex, lateral margins slightly concave, apex only slightly expanded, apical margin rounded; hypomeron only weakly punctate to rugulose. Mesoventrite and metaventrite. Mesosternum rugosely pitted, no medial carina present; metepisternal axillary space relatively distinct, axillary line straight or slightly curved, reaching around ¼ length of metepisternum. Legs. Metatibia of males constricted along basal ¼ to 1/3 and then distinctly expanded towards apex ( Fig 7D ), as in C. truncatus .

Abdomen ( Fig. 7F ). Genitalia. Male paramere in lateral view with dorsal margin convex and ventral margin evenly concave, narrowing towards apex, numerous fine setae along ventral apical margin, base of dorsal margin with a small nodule; in dorsal view, with outer lateral margin slightly convex, lateral inner (mesal) margin slightly curved, concave around mid-length to pre-apically, apex of paramere slightly oblique, rounded particularly on outer angle, appearing roundly truncate. Female internal genitalia was not examined in this study.

Figures

FIGURE 7. Carpophilus imitatus sp. nov., ♁ paratype (VAITC 8601), A) – G). A) dorsal habitus, B) lateral habitus, C) ventral habitus, D) prosternum and hypomeron, E) metatibia, F) paramere, lateral view, G) paramere, dorsal view. ♀ paratype (8607), H) – M). H) dorsal habitus, I) lateral habitus, J) ventral habitus, K) prosternum and hypomeron, L) metatibia, M) antenna.