Chiliotis Reitter, 1875

Gimmel, Matthew L. & Leschen, Richard A. B., 2022, Revision of the genera of Picrotini (Coleoptera: Cryptophagidae: Cryptophaginae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 62 (1), pp. 61-109 : 74-76

Chiliotis Reitter, 1875

( Figs 13–17 , 85 )

Chiliotis Reitter, 1875: 82 . Type species: Chiliotis formosa Reitter, 1875 , by monotypy.

Brounina Bruce, 1943: 58 (as subgenus of Cryptophagus ). Type species: Cryptophagus (Brounina) fossulata Bruce, 1943 , by monotypy; syn. nov.

Diagnosis. Members of this genus are distinctive among Picrotini for being densely setose dorsally but possessing a wide glabrous space along the lateral pronotal bead ( Fig. 85 : lgs). Additionally, the pronotum possesses no platforms, teeth (small setose denticles present in one undescribed species, Fig. 14 ), or protrusions, and the anterior angles are rounded; the antennal club is composed of three antennomeres and all abdominal ventrites are free.

Redescription. Length 1.32–2.22 mm. Body form ( Figs 13–17 ) elongate and parallel-sided to subfusiform, dull to somewhat shining dorsally, with dense decumbent setae and often with a few short to long, sparse, suberect to erect setae dorsally; unicolorous (most), distinctly bicolored or multicolored. Head with tempora present, length from about 1/4 to 1/3 length of eye; vertex with temporal depression immediately anterior to ridge; band of reticulate sculpture present. Frontoclypeus not projecting laterally; raised portion of frons between antennal insertions not constricted, slightly narrower to about as wide as or wider than antennal club. Transverse ridge above antennal insertions absent. Eye large, rounded, contacting antennal cavity; interfacetal setae present. Antennal club consisting of 3 antennomeres; antenna inserted into small cavity; antennomere 9 subequal in width to antennomere 10. Mandible with apex bifid, subapical serrations present. Maxillary palpomere 4 distinctly longer than or subequal to 3; palpomere 4 not subulate. Gena without antennal groove; genal spines acute. Gular sutures incomplete, not reaching occipital foramen. Pronotum not explanate or strongly constricted at base, usually narrower than elytra, sometimes markedly so, parallel-sided or widest at middle or at base; anterior angles absent, not projecting anteriorly (not extending anterior to cervical foramen of prothorax), without a distinct flat glandular surface or platform; lateral carina present and complete, smooth and lacking teeth, crenulations, or setigerous tubercles (setigerous tubercles present in one undescribed species), with well-developed and widened lateral glabrous space, width of lateral bead wider than discal puncture and narrower than antennal funicle ( Fig. 85 ); disc with basal impressions usually present, taking various forms, often transverse, broad, and shallow, sometimes paired and either circular or oblique;

paramedial carinae and paralateral plicae absent; posterolateral angles about right angled or obtuse. Prothoracic hypomeron fused to prosternum. Prosternum with anterior margin on same plane as disc; prosternal process with lateral beads distinct, parallel for much of length, then converging apically to narrowly rounded point (broadly rounded in some), process slightly expanded apically, narrowly to broadly rounded and crenulate with minute setae; procoxal cavity with anterolateral notch. Scutellar shield clearly visible, transverse to obtusely triangular. Elytron without humeral tooth; subbasal impression present or absent, subapical impression absent; subapical gape present; punctation confused, dense and well or moderately impressed; vestiture dual with long, dense, erect to suberect setae present laterally or on disc, erect setae sometimes short and sparse, decumbent setae forming undulate pattern, with postscutellar and subapical setae usually directed laterally, or uniformly directed posteriorly. Hind wing well developed. Mesoventrite with mesoventrital cavity shallow or bowl-like and sometimes flanked by sharp carinae. Mesanepisternal pit present, either lined with setae or glabrous. Metaventrite without postcoxal lines; discrimen more or less than 1/2 length of metaventrite, posterior notch of metaventrite present or absent. Metendosternite with anterior tendons approximate. Tarsi 5-5- 5 in female, 5-5- 4 in male; tarsi moderately slender, tarsomere 5 as wide as preceding tarsomeres in lateral view; pro- and mesotarsomere 4 with few ventral setae to unisetose; mesotarsomere 3 not or weakly lobed, with few setae; mesotarsomeres 1–4 of subequal lengths, or mesotarsomere 1 slightly longer than 2, or mesotarsomere 4 slightly shorter than each of the preceding, mesotarsomere 5 about as long as or slightly shorter than mesotarsomeres 1–4 combined. Abdominal ventrites free and with medial and lateral calli present, intersegmental crenulations absent; ventrite 1 with intercoxal process narrowly to broadly rounded, without postcoxal lines; medio-basal thickenings of ventrites 3–5 absent; apex of ventrite 5 with crenulations. Abdominal spiracles on segment VII with openings present and larger in diameter than spiracle VI, texture granulate and atrium rounded and saclike. Aedeagus with tegminal strut absent, tegminal arms fused, with a suture; parameres separate or fused at their extreme bases and articulated to phallobase, inner surface not concave or slightly concave at the base, length about 2–2.5× longer than wide; apices asetose, or multisetose; attachment point to phallobase not constricted, interparameral process absent; basipenis 3–4× longer than distipenis, with or without median carina; distipenis relatively long (about 2.1× longer than wide), outer rims weakly to strongly crenulate, lateral lobes not widely separated, symmetrical; internal sac with a pair of short irregularly shaped endophallites or one elongate endophallite that is bifurcate anteriorly.

Remarks. The type species of Brounina, B. fossulata ( Bruce, 1943) from Chile, falls within our concept of the genus Chiliotis . Consequently, we synonymize the two generic names. The other described species of Brounina, B. distincta ( Broun, 1893) , was found to fall within our new genus Notocryptus .

Based on the original description (Rൾංඍඍൾඋ 1876: 364) and that of Gඋඈඎඏൾඅඅൾ (1919b: 182, as Micrambina analis ), we tentatively include Telmatophilus analis Reitter, 1876 in this genus. The type series has not been located (see LൾඌർHൾඇ & Gංආආൾඅ 2012).

Undescribed species of Chiliotis seem to exist, but the identities of the described species have yet to be fully elucidated. The most widespread and common form seems to be that represented in Fig. 16 .

Biology. Members of this genus are collected in flight intercept traps, leaf litter, and by beating vegetation. One undetermined species was collected from galls on vines in Puyehue National Park, growing on Nothofagus Blume (Nothofagaceae) trees (LൾඌർHൾඇ 1996).A gut of a dissected specimen contained dark fungal spores.

Distribution. Argentina, Chile.

Included species (9). Chiliotis analis ( Reitter, 1876) comb. nov. (from Micrambina ), Chiliotis exilis Grouvelle, 1919 ; Chiliotis formosus Reitter, 1875 ; Chiliotis fossulatus ( Bruce, 1943) comb. nov. (from Brounina); Chiliotis germaini Grouvelle, 1919 ; Chiliotis gigas Grouvelle, 1919 ; Chiliotis gracilis Grouvelle, 1919 ; Chiliotis laticeps Grouvelle, 1919 ; Chiliotis longicornis Grouvelle, 1919 .

Figures

Figs 10–18. Habitus of species of Picrotini. 10 – Bellascelis n. sp. 1 (Australia: Qld); 11 – Bellascelis n. sp. 2 (Australia: NSW); 12 – Chileothortus infuscatus sp. nov.; 13 – Chiliotis sp. 1; 14 – Chiliotis sp. 2; 15 – Chiliotis sp. 3; 16 – Chiliotis sp. 4; 17 – Chiliotis sp. 5; 18 – Chimaerocryptus johnsoni sp. nov. Scale bars = 1 mm.

Figs 82–89. Head and pronotum of Picrotini. 82–88 – lateral view. 82 – Antarcticotectus rutilus (Broun, 1880); 83 – Antarcticotectus silvanus (Broun, 1880); 84 – Antarcticotectus tasmanicus (Blackburn, 1907); 85 – Chiliotis sp.; 86 – Notocryptus australis (Redtenbacher, 1868); 87 – Ostreacryptus helmsi (Reitter, 1880); 88 – Humerocryptus n. sp. 1. 89 – dorsolateral view, Humerocryptus tumidus (Broun, 1893).Abbreviations: lgs = lateral glabrous space.