Afroanthracites lineatus, Hemp & Heller, 2019

Hemp, Claudia & Heller, Klaus-Gerhard, 2019, New Agraeciini species from the Eastern Arc Mountains, East Africa (Orthoptera: Tettigoniidae; Conocephalinae; Agraeciini), Zootaxa 4664 (3), pp. 301-338 : 308-310

Afroanthracites lineatus n. sp. Hemp C.

( Figs. 10–11 )

Holotype: male. Tanzania, East Usambara Mountains , Lutindi Forest Reserve, submontane forest, February 2017 . Paratype female, same data as holotype. Depository: collection C. Hemp .

Description. Male. General colour predominantly green and brown. On dorsum of pronotum in area of metazona large brown patch bordered green. Head and antennae. Fastigium verticis conical, slightly shorter than scapus. Head and area around scapi green, face brown. Thorax. Pronotum in area of pro- and metazona strongly rugose. Metazona slightly inflated; disc of metazona with numerous impressed dots. Tegmina hidden for most of their length under pronotum only straight hind margins of tegmina visible. Antennae long, more than twice the length of body, scapus and first antennomere green, remaining flagellum tawny. Legs predominantly green. Fore coxa with almost straight spine. Fore femora with three, mid femora with two and hind femora with 5 outer ventral spines. Inner margins of all femora unarmed. Fore and mid tibiae with double row of 4 inner and 5 outer ventral spines. Hind tibiae with 4 rows of densely set spines getting denser distally. One spur on each side dorsally and two pairs of spurs ventrally. Abdomen. Abdomen green. Tenth abdominal tergite with median black stripe; elongated, at tip fork-like divided, at lower margin two rounded blunt processes ( Fig. 10 A, B, C ). Subgenital plate elongated, posteriorly upcurved and v-shaped incised medially, with short styli ( Fig. 10 C ).

Female. Similar to male in size but with more mottled colour pattern. Face as male. Brown patch on metanotum of pronotum not as large and conspicuous as in male and darker. Ovipositor slightly up-curved. Posterior margin of 10 th abdominal tergite forming two small lobes ( Fig. 11 B ). Subgenital plate broad with v-shaped incised median gap with two short tips, rounded laterally ( Fig. 11 A ).

Measurements, male (mm) (N = 1). Body length 26.5. Length of pronotum 7.7. Length of hind femur 12.5.

Measurements, female (mm) (N = 1). Body length 22. Length of pronotum 6.7. Length of hind femur 14.2. Ovipositor 11.5.

Diagnosis. An elongated strongly to its apex narrowing 10 th abdominal tergite is only also found in A. jagoi Ünal & Hemp, 2013 from the West Usambara Mountains. However, the tip of A. jagoi is more strongly incised at its tip ( Fig. 12 A ) compared to A. lineatus n. sp. A. jagoi is of smaller body size and has a different overall colour pattern than A. lineatus n. sp. Very easy character to identify males of A. lineatus n. sp. beside its much elongated 10 th abdominal tergite is the black stripe medially on this structure. Females of A. jagoi and A. lineatus n. sp. are very similar but as in males, A. jagoi females are of smaller body size and the ovipositor is shorter. Also the 10 th abdominal tergite is different: medially the projection is almost blunt with only a tiny median incision in A. jagoi ( Fig. 12 B ) while it is well incised and thus forming two lobes in A. lineatus n. sp. ( Fig. 11 B ).

Distribution. Only known from Lutindi Forest Reserve in the East Usambara Mountains.

Etymology. Named after the black stripe on the 10 th abdominal tergite of the male. From Latin— linea = stripe.

Figures

FIGURE 10. Abdominal apex of male Afroanthracites lineatus n. sp. A. Semilateral view on apex B. Dorsal view on apex C. Lateral view on apex.

FIGURE 11. Female Afroanthracites lineatus n. sp. A. Subgenital plate B. Dorsal view on apex with slightly produced and medially indentated 10th abdominal tergite.

FIGURE 12. A. 10th abdominal tergite and left cercus (inset) of male A. jagoi from Mazumbai Forest Reserve in the West Usambara Mountains. B. 10th abdominal tergite of female A. jagoi, same locality as male.