Rhyparus Agassiz, 1846

Anichtchenko, Alexander, Minkina, Łukasz, Vasiljeva, Anastasija & Medina, Milton Norman D., 2021, A review of the genus Rhyparus in the Philippines, with descriptions of two new species from Mindanao (Coleoptera: Scarabaeidae: Aphodiinae), Acta Entomologica Musei Nationalis Pragae 61 (1), pp. 99-111 : 100

Rhyparus Agassiz, 1846

Diagnoses of the genus were provided by Hඈඐൽൾඇ & Sඍඈ*©ൾඒ (1992), Pංඍඍංඇඈ (2006) and SΚൾඅඅൾඒ (2007) and include the following features: head with four basal tubercles; clypeal disc convex, ringed with groove; clypeal margin broad with double edge; pronotum with longitudinal costae and grooves transected by single median transverse groove or set of deep fossae; elytra distinctly costate on alternating intervals, with apical bulbous protuberances with trichomes; prosternal process projecting caudally, hastate; metaventrite usually with posterior lateral projection; and all protibial teeth located in apical one-fourth.

Key to the species of the genus Rhyparus

from the Philippines

1 Elytron without accessory costa on third intercosta, or with short, vestigial costa only. .................................... 2

– Elytron with long accessory costa on third intercosta. Dorsal side abundantly covered by yellow macrosetae ( Figs 2a–c ). ............................... R. flavohirtus sp. nov.

2 All intercostae of pronotum densely and evenly punctate. ................................................................................. 3

– Only median intercostae, and anterior part of other intercostae densely and evenly punctate. ................... 4

3 Elytron without accessory costa on third intercosta. Elytral costae convex, intercostae with only two rows of large punctures ( Figs 6a–c ). ........................................ ...................................... R. philippinensis Arrow, 1905

– Elytron with short accessory costa on third intercosta. Elytral costae flat, intercostae with two rows of large punctures and additional one or two rows of small punctures between them ( Figs 3a–c ). ............................ .................................................. R. gracilis Arrow, 1905

4 Medium-sized to large species: body length: 5.5–7.4 mm. Intermediate lobes of pronotum never larger

Rhyparus barclayi Masumoto, Ochi & Ho, 2019 ( Figs 1a–c , 7 , 13 , 19 , 25a–b )

Material examined. PHILIPPINES: Lඎඓඈඇ: 1 ♀, Banaue, Ifugao, vii.2018, local coll. ( CNCW). Mංඇൽൺඇൺඈ: 1 J, Dominorog, Bukidnon, i.2019, local coll. ( LMCN); 1 ♀, Davao City, Talomo Mts., Mt. Talomo, 7°04′36.9″N 125°20′13.2″E, 1100 m., 25.–30.iii.2019, Medina MND. leg. ( UMCRC); 1 ♀, Lake Holon, vi.2019 ( DUBC); 1 ♀, South Cotabato, T’Boli, Lake Holon Mts., Lake Holon, 1466 m., 6°05′48.1″N 124°52′56.7″E, 12.vi.2019, Torrejos C. leg. ( UMCRC).

Diagnosis. Large species: body length 6.0– 7.4 mm ( Figs 1a–c ). Head depicted in Fig. 7 ; epipharynx as in Fig. 13 . Pronotum with anterior lobes slightly larger than intermediate; median intercosta with dense punctation, second intercosta without punctures, third intercosta with moderately dense punctation; paramedian costae of pronotum can be basally slightly inwardly bent.All intercostae of elytra with two rows of medium-sized punctures. Internal and median protrusion of caudal bulbs connected, with very weak sinuation between them, external protrusion rather distinctly developed ( Fig. 19 ). Surface between external protrusion of caudal bulb of elytra and lateral margin of elytra distinctly sinuate – external protrusion more or less developed; however, median and internal protrusions always with same proportions.Aedeagus as in Figs 25a–b .

Distribution. Species recorded from the Philippines for the first time. Previously was known from Taiwan (Lanyu Island).

Figures

Fig 1. Habitus of Rhyparus barclayi Masumoto, Ochi & Ho, 2019: a – dorsal view; b – right dorsolateral view; c – right lateral view. Scale bar = 1.0 mm.

Fig. 2. Habitus of Rhyparus flavohirtus sp. nov., male, holotype: a – dorsal view; b – right dorsolateral view; c – right lateral view. Scale bar = 1.0 mm.

Fig. 6. Habitus of Rhyparus philippinensis Arrow, 1905, syntypes: a – dorsal view; b – right dorsolateral view; c – right lateral view. Scale bar = 1.0 mm.

Fig. 3. Habitus of Rhyparus gracilis Arrow, 1905: a – dorsal view; b – right dorsolateral view; c – right lateral view. Scale bar = 1.0 mm.

Figs 7–12. Head of Rhyparus species, frontal view: 7 – R. barclayi Masumoto, Ochi & Ho, 2019; 8 – R. flavohirtus sp. nov.; 9 – R. gracilis Arrow, 1905; 10 – R. helophoroides Fairmaire, 1893; 11 – R. mindanaoensis sp. nov.; 12 – R. philippinensis Arrow, 1905. Scale bar = 1.0 mm.

Figs 13–18. Epipharynx of Rhyparus species: 13 – R. barclayi Masumoto, Ochi & Ho, 2019; 14 – R. flavohirtus sp. nov.; 15 – R. gracilis Arrow, 1905; 16 – R. helophoroides Fairmaire, 1893; 17– R. mindanaoensis sp. nov.; 18 – R. philippinensis Arrow, 1905. Scale bar = 0.5 mm.

Figs 19–24. Elytra of Rhyparus species, oblique apico-dorsolateral view: 19 – R. barclayi Masumoto, Ochi & Ho, 2019; 20 – R. flavohirtus sp. nov.; 21 – R. gracilis Arrow, 1905; 22 – R. helophoroides Fairmaire, 1893; 23 – R. mindanaoensis sp. nov.; 24 – R. philippinensis Arrow, 1905. Scale bar = 1.0 mm.

Figs 25–30.Aedeagus of Rhyparus species, a – lateral view, b – dorsal view. 25 – R.barclayi Masumoto, Ochi & Ho, 2019; 26 – R. flavohirtus sp. nov.; 27 – R. gracilis Arrow, 1905; 28 – R. helophoroides Fairmaire, 1893; 29 – R.mindanaoensis sp. nov.; 30 – R.philippinensis Arrow, 1905. Scale bar = 0.5 mm.