Callirhinus huiinis Ramirez-Ponce & Zaragoza 2024, sp. nov.
Creators: name: Ponce, Andrés Ramírez
name: Caballero, Santiago Zaragoza
name: Seidel, Maưhias
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Callirhinus
Callirhinus huiinis

description: Callirhinus huiinis Ramírez-Ponce & Zaragoza, sp. nov.
(Figs 8E, 9E, 13)
ZooBank: urn:lsid:zoobank.org:act: 0D476617-43E5-4A22-B9A1- B97BB23CE849
Type material: Holotype (male, CNIN): (a) ‘ MÉXICO: Oaxaca / Pochutla km 215 Oaxaca/ Puerto Angel 316msnm/ 15°51´46 N 96°28´29 W / 8/X/2004 / L Cervantes J. Calonico’, (b) ‘ Callirhinus huiinis Ramírez-Ponce & Zaragoza, 2022 HOLOTYPE ♂’ (red label). Paratypes (1 ♂, 9 ♀♀; ARPC, CCZ, CNIN, DJCC, GALC, IEXA, MSPC, MXAL): (a) same data of holotype, (b) ‘ Callirhinus huiinis / Ramírez-Ponce & Zaragoza/ 2022/ PARATYPE’ (yellow label) [1 ♂, 9 ♀♀: ARP (1 ♂, 1 ♀); DJCC (1 ♀); CNIN (2 ♀♀); IEXA (1 ♀); GALC (1 ♀); MSPC (1 ♀); CCZ (1 ♀)].
Diagnosis: Pronotum with second half with sides converging; mesometaventral projection not surpassing the mid-mesocoxa, slender, not visible in lateral view; parameres apically forceps-like, with apex acute.
Description: Holotype (male, CNIN): length 7.97 mm; width 3.93 mm. Colour (Fig. 8E): head, pronotum, and scutellar shield reddish brown with green metallic reflections; elytra, venter, and legs yellowish brown. Head (Fig. 13C, D): frons densely areolate-rugose to punctate toward occipital area, spaces rugulose-transverse on disc; spaces moderate in size. Clypeus with apex slightly curved, straight, slightly reflexed, lateral borders slightly curved, broad-based, not elongate; densely punctate, punctures rugulose-transverse. Interocular width equals 6.0 transverse eye diameters. Antennal club subequal to scape, pedicel, and funicle together. Pronotum (Fig. 13E): lateral margins convergent (distal half); surface moderately dense and uniformly punctate (separated by 1.0–2.0 diameter widths), punctures slightly wide, shallow, rounded (Fig. 13F). Elytra: surface with 12 punctate striae not parallel; punctures moderate in size, shallow, almost regularly contiguous; 7 striae on disc, 5 laterad of humerus; dorsal striae 5 and 8 irregularly impressed, incomplete; stria 10 and 11 mixed; interstriae not raised, sutural striae completely raised, subbasal sinuation deep. Pygidium (Fig. 13G): surface shallowly imbricate, with moderately short and slender setae, longer on apex; concavity pronounced gradually throughout (lateral view). Venter (Fig. 13A, B): mesometaventral projection narrow, to mid-mesocoxa, apex not visible in lateral view; abdominal ventrites with transverse, regular rows of short, yellowish setae, mesial area almost glabrous. Legs (Fig. 13H–L): protibia narrow; upper teeth short, almost straight, rounded; protarsomere 5 shorter than the length of the previous ones combined, interno-basal protuberance bulb-shaped; protarsomeres 1–4 slightly shorter and wider; protarsomere 4 with interno-mesial lobe slightly increased; protarsomere 1 longer than 2. Lower ramus of inner claw 2.7 times the width of upper one.Mesotibia slender, widest at middle, weakly expanded at apex; external margin with a few separate, thick, and short spines at the base; discontinuous, oblique carina in basal third (composed of 3–5 spines), and continuous oblique carina in subapical two-thirds (composed of 7–8 spines); apex with 8 short spines; apical spurs acute; internal spine reaching the middle of mesotarsomere 2, external spur exceeding mesotarsomere 1. Metatibia slender, slightly wider at middle, weakly expanded at apex; external margin with incomplete oblique carina in basal third (composed of 3–4 short spines), and continuous oblique carina in subapical two-thirds (composed of 10 spines, the external-ventral very long); apex with 12 short spines; internal spur slightly longer than metatarsomere 2, external spur shorter than half of metatarsomere 1. Metatarsomere 5 slightly shorter than the length of the previous ones combined; internal mesoapical patch of setae present in metatarsomere 4; internal spines on metatarsomere 1 and external ones in metatarsomere 4 relatively thick and long. Parameres (Fig. 9E): as long as wide; external margins sinuated, constricted base and subapically widened and rounded, distally forceps-like curved, apex acute.
Sexual dimorphism: In females upper external denticle of protarsus and 1st protarsomere notably longer; internal protarsal claw thin, with the upper ramus equal to the lower; wider epipleura.
Variation: Body size ranging between 8–9 mm. Colour completely orange, navy, or contrastingly colourful, with head and pronotum green or metallic blue and elytra completely orange. Variation expressed in the curvature of the clypeus, and the density and size of punctures of the head, pronotum, and scutellar shield.
Etymology: From the Zapotec word, ‘ Huiini ’ (small), with the suffix adjectivized of the Latin ‘ is ’, that indicates property or quality; Callirhinus huiinis, ‘the small Callirhinus ’.
Distribution: South of Oaxaca, Mexico (Fig. 15).
Phenology: October (11).
Natural history: The type series was collected on the slopes of the southern coast of Oaxaca, in a locality with low deciduous forest at 316 m a.s.l. No information available on its feeding habits and life cycle.
Taxonomic remarks: Callirhinus huiinis is the smallest species (although some specimens of C. metallescens are as small as this species). It shares some characters with C. choperi such as a thin protibia, an upper external projected denticle, and these are the only two species with forceps-like parameres.
description: Published as part of Ponce, Andrés Ramírez, Caballero, Santiago Zaragoza & Seidel, Maưhias, 2024, Geometric morphometry enables species hypotheses testing and the assignment of historical type specimens in the genus Callirhinus Blanchard (Coleoptera: Scarabaeidae: Anomalini), pp. 1-26 in Zoological Journal of the Linnean Society 202 on pages 21-22, DOI: 10.1093/zoolinnean/zlad172, http://zenodo.org/record/14415885