Atlantemolanum riehli ( Harold 1868 ) Molano-Rendón & Vaz-de- Mello, 2019

Molano-Rendón, Arturo González-Alvarado ı Fredy & Vaz-de- Mello, Fernando Z., 2019, A new genus of dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) endemic to the Brazilian Atlantic Forest, Journal of Natural History 53 (27), pp. 1751-1765 : 1758-1762

Atlantemolanum riehli ( Harold 1868) new combination

( Figures 1 (a)ı 2ı 3ı 5ı blue circles)

Deltochilum riehli Harold 1868: 79 ; Harold 1869: 996; Gillet 1911: 36; Blackwelder 1944: 203; Campos and Medina 2013: 51; Culot et al. 2013: 85. Deltochilum (Eudactylides) riehli Paulian 1939: 9 . Deltochilum (Calhyboma) riehli Pereira and d ’ Andretta 1955: 8ı 15ı figs 21 – 30; Vulcano and Pereira 1964: 645. Dichotomius [sic] riehli ; Campos and Medina 2013: 49.

Material examined

Type material examined. Lectotype (designated by Paulian 1939: 10; ICZN 1999 Art. 74.6)ı unsexedı Brazilia (handwritten)/Riehliı T. Harold (handwritten)/EX Musaeoı E Harold (printed)/(red label) HOLOTYPE (printed)/R. Paulianı Vidit (printed)/(red label) HOLOTYPE (printed)ı Deltochilum (handwritten)ı riehli Har. (handwritten)ı F.Z. Vaz-de-Mello (printed) (MNHN).

Remark on lectotype designation: following the recommendation 73F of the ICZN (1999) we consider that syntypes of D. riehli may exist; when Paulian (1939) considered that this species was described from a single specimen and determined that specimen to be the typeı he designated the lectotype by inference ( ICZN 1999 Art. 74.6).

Non-type material examined. BRAZIL: Rio de Janeiro: Itatiaiaı PARNA Itatiaiaı 1 female 22°27 ʹ 35.1 ” Sı 44°36 ʹ 16.8 ” Wı 750 mı 23 – 26.xii. 2011ı C. Araújo & R. Andradeı pitfall ( CEMT) ı

1 femaleı 22°26 ʹ 05 ” Sı 44°37 ʹ 29 ” Wı 1200 mı 25 – 27.vii. 2012ı C. Araújo & R. Andrade ( CEMT) ı 1 maleı 22°25 ʹ 18 ” Sı 44°38 ʹ 00 ” Wı 1600 mı 23 – 26.xii. 2011ı C. Araújo & R. Andrade ( CEMT); RJ [Rio de Janeiro]: Nova Friburgoı Macaé de Cimaı 1 maleı III. 2007ı E. J. Grossi ( CEMT)ı Nova Friburgoı Macaé de Cimaı 1500 mı 1 maleı XI. 1999ı E. & P. Grossi ( CEMT)ı 1 female Itatiaiaı PARNA Itatiaiaı Mata Atlânticaı 22°25 ʹ 46 ” Sı 44°37 ʹ 38 ” Wı 1350 mı 20.i. 2012ı Pitfallı Fezes Humanası C. Araújo; Rio Grande do Sul: São Francisco de Paulaı Floresta Umbrófila mistaı FLONA de S.F. de Paulaı FO3ı 1 femaleı 13.I. 2008ı Livia Audinoı P6 excremento ( CEMT)ı São Francisco de Paulaı Plantação de Araucaria angustifolia ı FLONA de S.F. de Paulaı PA3ı 1 femaleı 13.I. 2008ı Livia Audinoı P1 excremento ( CEMT)ı 1 femaleı 13.I. 2008ı Livia Audinoı P3 excremento ( CEMT); São Paulo: PESerra do Marı Núcleoı SantaVirginiaı Sede VargemGrandeı 23°26 ʹ 39 ” Sı 45°14 ʹ 23 ” Wı 1 femaleı 17.I. 2012ı Marion Boutefeuı Humanfaec30 ( CEMT)ı São Miguel Arcanjoı PECarlos Botelhoı 24°03 ʹ 40 ” Sı 47° 58 ʹ 44 ” Wı 819 mı 2 femalesı 11.IV. 2012ı Marion Boutefeuı Brachyteles faec29 ( CEMT)ı São Miguel Arcanjoı PECarlos Botelhoı 24°03 ʹ 37 ” Sı 47°58 ʹ 43 ” Wı 810 mı 1 maleı 11.IV. 2012ı Marion Boutefeuı Brachyteles faec29 ( CEMT)ı São Miguel Arcanjoı PECarlos Botelhoı 24° 03 ʹ 57 ” Sı 47°59 ʹ 57 ” Wı 693 mı 1 femaleı 15.XI. 2011ı E. Bovyı Tapir faec10 ( CEMT)ı São Miguel Arcanjoı PECarlos Botelhoı 24°03 ʹ 35 ” Sı 47°58 ʹ 43 ” Wı 795 mı 1 maleı 20.XI. 2011ı E. Bovyı Brachyteles faec3 ( CEMT)ı 1 unsexedı 50km SE Mogi das Cruzes Serra do Marı Est. Biol. Boracéiaı 800 – 900mı 28-30.IV. 1997ı F. Génier & S. Ide Ex. faeces trapı cloud forest (CMNC); SC [Santa Catarina]: Campos Novosı 27°23 ’ Sı 51°12 ʹ Oı 1 maleı Fev 2011ı R.C. Camposı Armadilha pitfall isca ( CEMT)ı 1 female 1 maleı Fev 2013ı R.C. Camposı Armadilha pitfall isca ( CEMT)ı 8 females 8 malesı Fev 2014ı R.C. Camposı Armadilha pitfall isca ( CEMT)ı Monte Casteloı Mata Nativaı 26°43 ’ Sı 50°19 ʹ Oı 881 mı 1 maleı 7. i. 2013ı A.L. Brandlı pitfall ( CEMT)ı 1 maleı Nova Teutoniaı F. Plaumann ( MZUSP).

Diagnosis

A. riehli ( Harold 1868) can be separated from A. costalimai (Pereira and d ’ Andretta 1955) by the following combination of characters: (1) 1st interstria with callosities basally ( Figure 2 (b)); (2) interstrial callosities elevatedı in lateral view higher than interstriaeı and (3) posterior margin of pronotum with dispersed puncturesı each puncture separated by more than one diameter.

Redescription

Male. Colour black.

Pronotum ( Figure 1 (eı g)). Posterior margin with sparse puncturesı each puncture separated by more than one diameter.

Elytra ( Figure 2 (b–d)). Interstrial callosities elevatedı in lateral view higher than interstriae; the callosities vary in size along length and between interstriae. 1st and 3rd interstriae with larger callosities on elytral disc; 5th and 7th interstriae with callosities almost the same size along of the length. Callosities slightly largest on 3rd interstria and smallest on 1st interstria. Apex of 4th interstria with or without tubercle ( Figure 2 (c)).

Pygidium . With extended transversal punctures.

Abdomen. 1st ventrite with two sinuate lateral carinaeı one on each side of midline ( Figure 1 (d)).

Male genitalia ( Figure 3 ). Aedeagus with parameres shorter than phallobase ( Figure 3 (a)); apex of parameres hook-shaped ( Figure 3 (b)); parameres asymmetricalı left paramere longer and more curved than the otherı right paramere wider than the left. Submedial area of internal sac with five elongated raspules. Apical area of internal sac with two scleritesı one of themı circular-shaped basal sclerite ( Figure 3 (c))ı apex of handle of this sclerite roundedı and the other oneı the elongate sclerite with irregular shape ( Figure 3 (e)). Apical area of the internal sac without the plate-shaped scleriteı in the area where this sclerite is normally found in Scarabaeinae (see Medina et al. (2013))ı there is a membranous area with small scales ( Figure 3 (d)). Genital segment ( Figure 3 (f)) with longitudinal lateral plates longitudinally; medial plate complete with two slight projections.

Sexual dimorphism. Female without lateral carinae on 1st ventrite; protibial spur slightly finer and straighter than in male.

Distribution ( Figure 5 ı blue circles)

BRAZIL ı Rio de Janeiroı Rio Grande do Sulı São Pauloı Santa Catarina.

Remarks

The plate-shaped sclerite of the internal sac of the aedeagus is a constant structure within Scarabaeinaeı with few exceptions (Medina et al. 2013). All examined species of Deltochilum have this sclerite. The lack of this sclerite and a membranous area with scales in the position where it is normally foundı as observed in A. riehli ı could be considered another good character with which Atlantemolanum can be separated from Deltochilum . Howeverı as the male of A. costalimai is unknownı it is not possible to know if this is a generic a character or a specific one for A. riehli .

The same argument can be made for the first ventrite of the maleı which has two situated carinaeı a character only observed in A. riehli ı and not seen by us or described for any other Scarabaeinae.

This species was collected in flight interception trapsı pitfall traps baited with humanı tapir or southern muriqui faeces.

Figures

Figure 1. Atlantemolanum new genus and Deltochilum. (a) male Atlantemolanum riehli (Harold 1868) new combination, dorsal view; (b) female Atlantemolanum costalimai (Pereira and d’Andretta 1955) new combination, dorsal view. (c-e) A. riehli (c) mesoleg; (d) pronotum in lateral view, white arrow indicates the interrupted carina that separates pronotum from hypomeron, black arrow indicates the anterior hypomeral excavation; (e) pronotum, dorsal view; (f) Deltochilum rubripenne, pronotum in dorsal view.

Figure 2. Male Atlantemolanum riehli. (a) head, dorsal view; (b) right elytron; (c) elytral apex; (d) elytral sculpture: left, detail of puntctures of the striae and interstria, and right, detail of interstria showing bright callosities; (e) metaesternum; (f) ventrites; (g) mesoleg; (h) metaleg.

Figure 3. Male genitalia Atlantemolanum riehli. (a) aedeagus, lateral view; (b) apex of the paramere; (c) basal sclerite; (d) membranous area showing small scales; (e) elongate sclerite; (f) genital segment.

Figure 5. Locality map; blue circles, Atlantemolanum riehli (Harold 1868); red star, Atlantemolanum costalimai (Pereira and d’Andretta 1955).