Spodochlamys keitai Kobayashi and Ratcliffe, 2023

Kobayashi, Kazuo & Ratcliffe, Brett C., 2023, A New Species of Spodochlamys Burmeister, 1855 (Coleoptera: Scarabaeidae: Rutelinae: Anatistini) from Colombia and a Key and Checklist of Spodochlamys Species, The Coleopterists Bulletin 77 (1), pp. 120-126 : 121-124

Spodochlamys keitai Kobayashi and Ratcliffe , new species

zoobank.org/ urn:lsid:zoobank.org:act:98807D14-6B85-4432-BA8A-1E3D4CA3EDE6 ( Figs. 1–2 )

Type Material. Holotype labeled “ COLOMBIA / Boyacá, / Otanche, / III-2021 ” and with our red holotype label ( Fig. 2F ) . Three paratypes with the same data and each with our red paratype label . Holotype deposited at the University of Nebraska State Museum ( UNSM), Lincoln , Nebraska, USA. One paratype was deposited at the Natural History Museum ( NHMUK), London, England, and two paratypes in the Keita Maruyama personal collection ( KMC), Tokyo, Japan.

Description of Holotype. Male ( Figs. 1A , 2A–F ). Length 27.0 mm; width across humeri 10.1 mm. Color: Head, pronotum, elytra, and tibiae reddish brown with shiny, metallic copper reflections; scutellar shield shiny metallic green ( Fig. 1A ); pygidium, venter and femora shiny reddish brown. Elytra lacking waxy bloom. Head: Head completely, densely rugulopunctate. Clypeal apex (dorsal view) broadly semicircular, rounded ( Fig. 1A ), weakly reflexed; surface (frontal view) with upper and lower margins subparallel. Labrum at middle 3 times wider than venter of clypeal apex ( Fig. 2B ), apex broadly, weakly subacute; surface with minute, sparse, setigerous punctures, setae short and pale. Mentum slightly tumescent with faint longitudinal depression from apex to middle of disc ( Fig. 2B ). Interocular width equals 3.8 transverse eye diameters. Antenna with club subequal in length to entire stem. Pronotum: Form evenly convex in lateral view. Surface completely, densely, coarsely rugopunctate, becoming more so toward slightly explanate lateral margins. Lateral margin evenly rounded, weakly crenulate ( Fig. 1A ). Basal margin with complete bead. Length at middle 1.6 times longer than frons. Scutellar shield: Surface densely rugulopunctate, glabrous. Elytra: Surface completely, densely, coarsely rugopunctate, rugae becoming larger and transverse laterally. Striae completely absent. Epipleuron (ventral view; Fig. 2A ) slightly concave, broad at base and gradually tapering apically, glabrous. Apex at suture nearly right angled. Apical umbone well developed, conical ( Figs. 1A , 2E ). Pygidium: Surface shiny, with minute, sparse, shallow punctures, glabrous. Form in lateral view strongly convex.Apical bead slender, slightly wider at middle. Venter: Mesoventrite not produced at apex. Meso- and metaventrite with long, dense, pale setae ( Fig. 2A ). Abdominal sternites with small, dense punctures. Legs: All tibiae coarsely rugopunctate. Protibia not elongate or curved, lacking ventroapical modification, inner margin straight ( Fig. 1A ); external margin tridentate, basal tooth slightly removed from apical teeth. Protarsal inner claw entire at apex; meso- and metatarsal inner claws minutely split at apices ( Fig. 1A ). Protarsomere 5 with weak median tooth. Profemur not elongated, lacking ventromedial projection. Procoxa not ventrally produced and enlarged. Metafemur with posterior margin “normal”, not weakly produced posteriorly, not laminate. Meso- and metatibial apices truncate, upper angle acute ( Fig. 2e ). Metatibial apical spurs simple, acute ( Fig. 2A ). Parameres: Form symmetrical, long, slender ( Figs. 2C–D ).

Variation. The three male paratypes ( Figs. 1B–D ) do not differ from the holotype. Length: 27.8–31.4 mm.

Etymology. The specific epithet is named in honor of Keita Maruyama who provided the specimens for this study.

Distribution. Spodochlamys keitai is known only from Otanche in Boyacá Department, Western Boyacá Province, in northeastern Colombia. Otanche is at an elevation of 1,050 m and surrounded by tropical rain forest. The specimens were purchased by Mr. Keita Maruyama from a local collector in Colombia.

Temporal Distribution. March (4).

Diagnosis. Spodochlamys keitai is immediately distinguished by its remarkably long and slender parameres ( Figs. 2C–D ) that are unlike any other in the genus. It is further differentiated from other species of Spodochlamys based on the characters in the key. The female remains unknown and so cannot be characterized.

We have not included the four species described by Soula (2010) ( Spodochlamys peruvianus Soula , Spodochlamys lydiae Soula , Spodochlamys curoei Soula, and Spodochlamys jamesonae Soula ) in our key because Soula’s typically brief descriptions and images do not include some diagnostic characters, including the form of the labrum and whether all the claws are split or not; those are essential characters for our key. Based on available information, these species would go to couplet 9 in our key. The form of the parameres in Soula’s paper might distinguish those species, although S. curoei and S. jamesonae seem remarkably close to each other and Spodochlamys neitai Jameson and Ratcliffe , and S. peruvianus seems close to Spodochlamys feyeri Ohaus s ensu Jameson and Ratcliffe (2011), not Soula (2010).

In gestalt, S. keitai resembles S. curoei but differs in the following respects: 1) the surface adjacent to the elytral suture is more coarsely rugose and not finely punctate; 2) slender, hair-like setae on the parameres are completely absent; and 3) the parameres are more elongated and bi-arcuate.

Natural History. Nothing is known of the life history of S. keitai .

Figures

Fig. 1. Dorsal habitus of Spodochlamys keitai, new species. A) Holotype, B–D) Paratypes.

Fig. 2. Holotype of Spodochlamys keitai, new species. A) Ventral habitus, B) Venter of head showing clypeus, labrum, and mentum, C) Parameres, caudal view, D) Parameres, lateral view, E) Apex of elytron showing apical umbone and right metatibia, F) Holotype labels. Scale bars = 10.0 mm (A); 2.0 mm (C and D); 5.0 mm (E); B and F not to scale.