Saprosites mapiaensis Minkina & Jákl, 2024

Minkina, Łukasz & Jákl, Stanislav, 2024, Two new species of Eupariini Schmidt, 1910 (Coleoptera: Scarabaeidae: Aphodiinae) from Indonesia, Zootaxa 5537 (4), pp. 561-570 : 564-567

Saprosites mapiaensis Minkina & Jákl , new species

( Figs. 4 – 6 , 8, 12 – 13 )

Type locality. Indonesia, New Guinea, Papua province, Nabire region, Mapia .

Type material. Holotype, male: Indonesia, W Papua prov. | Nabire reg., Mapia env. | xii.2006 | local collectors [ SJCP].

Description of the holotype (male). Dorsum ( Fig. 4 ). Length: 3.8 mm; maximum width: 1.45 mm. Body dark brownish; antennae, tarsomeres and mouth parts brown; glabrous.

Head ( Fig. 8 ) distinctly convex, shiny, with weak microreticulation; transversely trapezoidal; clypeus anteriorly widely, deeply sinuate, widely rounded each side of median emargination, sides very widely rounded, weakly notched before genae, which are angulate and distinctly exceeding eyes. Fronto-clypeal suture absent. Punctures on clypeus irregular in size: posteriorly coarse, very dense, otherwise dense, irregularly distributed, moderate in size; clypeal surface almost entirely covered by distinct, dense granules.

Epipharynx ( Fig. 12 ) transverse, with sinuate, anterior margin rounded, with no produced corypha and only triangular appendage. Acanthopariae, acropariae, prophobae, adelochaetae without chaetae. Chaetopariae with dense belts of long chaetae; chaetopediae with three thick and long chaetae. Epitorma rectangular shaped with apical angles wrapped. Tormae long.

Pronotum convex, distinctly transverse, as wide as base of elytra, widest nearby base, shiny, without microreticulation. Anterior angles rounded, sides nearly straight, in 2/3 of length not visible from above; quite distinctly sinuate before hind angles, which create denticulate appendage. Posterior margin before hind angles distinctly sinuate, then distinctly rounded. Anterior margin not bordered, sides distinctly bordered, posterior margin bordered only near hind angles. Punctation double: smaller punctures six to eight times smaller than larger, dense, fine, regularly distributed, regular in size; larger punctures dense, quite irregularly distributed, slightly irregular in size.

Scutellar shield small, triangular, shiny, with a trace of microreticulation, without punctures.

Base of elytra quite distinctly bordered, with small but distinct humeral denticles. Elytra elongate, convex, nearly parallel, widest nearby the base. Elytra with ten striae and ten interstriae. Interstriae distinctly convex, shiny, without microreticulation, with irregularly distributed, fine, dense punctation. Striae shiny, with distinct, not so coarse, quite sparse punctation; punctures of striae distinctly encroaching on interstriae; striae variably connected before apex.

Pygidium with similar structure as abdominal ventrites.

Legs.All femora shiny, without microreticulation, with simple, fine, quite dense punctation, profemora distinctly bordered anteriorly and posteriorly, meso- and metafemora anteriorly and posteriorly not bordered. Protibiae distinctly tridentate laterally, proximally serrulate, with dorsal side smooth; apical spur weakly outwardly bent before apex. Metatibiae superior apical spur distinctly as long as basimetatarsomere, latter as long as following one and half tarsomeres combined. Claws very short, thin, quite distinctly arcuate.

Macropterous.

Venter ( Fig. 5 ). Metaventral plate shiny, with a trace of the microreticulation, weakly convex, with distinct, narrow, quite deep longitudinal line in the middle; medial surface with fine, regular in size, moderately dense punctation. Abdominal ventrites shiny, with weak microreticulation; anterior margins weakly fluted medially, becoming deeply fluted at sides; the last abdominal ventrite very deeply fluted; with distinct, quite dense, fine punctation.

Aedeagus ( Fig. 13 ) with parameres slightly longer than phallobase. Parameres with distinctly downwardly, bent before apex, distinctly sinuate basally on inner side.

Sexual dimorphism. Unknown.

Etymology. Toponymic; an adjective derived from the name: Mapia, where the new species was collected.

Differential diagnosis. There are only a few species of the genus Saprosites with granules on the head in the entire territory of Asia, Australia and Oceania. Of these few species, S. mapiaensis , new species, can be distinguished by the very characteristic shape of hind angles of the pronotum (which looks like a small tubercle). Using the key for identification of Saprosites species from Indonesia ( Stebnicka 2012), S. mapiaensis , new species will be identified as S. crockerensis . In addition to the features mentioned above, we can distinguish S. mapiaensis , new species from S. crockerensis by the following features: higher and more widely distributed granules on the head, slightly less regularly distributed punctation on the clypeus, the clypeus more distinctly sinuate anteriorly, the anterior angles of the pronotum distinctly rounded (in S. crockerensis the anterior angles are somewhat rectangular), the posterior margin of the pronotum not bordered ( S. crockerensis has base of pronotum very distinctly bordered) and different aedeagus (compare figures 13 and 14).

Figures

FIGURES 4–6. Saprosites mapiaensis Minkina & Jákl, new species, holotype, male. 4, dorsal view; 5, ventral view; 6, lateral view.

FIGURES 7–16. Details of morphology. 7, Airapus malaitaensis Minkina & Jákl, new species, holotype, female, head; 8, Saprosites mapiaensis Minkina & Jákl, new species, holotype, male, head; 9, Airapus burrundieae Stebnicka & Howden, 1996, female, head; 10, Saprosites crockerensis Stebnicka, 1991, paratype, male, head; 11, Airapus malaitaensis Minkina & Jákl, new species, holotype, female, epipharynx; 12, Saprosites mapiaensis, new species, holotype, male, epipharynx; 13, Saprosites mapiaensis, new species, holotype, male, aedeagus in lateral view; 14, Saprosites crockerensis, paratype, male, aedeagus in lateral view; 15, Airapus malaitaensis, new species, holotype, male, mesoventral appendage in comparison to mesocoxa; 16, Airapus burrundieae, female, mesoventral appendage in comparison to mesocoxa.