A new species of Dicranocentrus Schött (Collembola, Orchesellidae) from the Brazilian Pampa, with a key to the gracilis-group taxa Author Silva, Clécio Danilo Dias Da 0000-0002-7776-8830 Department of Botany and Zoology, Biosciences Center, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil danilodiass18@gmail.com Author Nunes, Rudy Camilo 0000-0002-3140-9146 Biodiversity and Biotechnology Research Group of North Center Piaui, Federal Institute of Education, Science and Technology of Piaui, Pedro II, PI, Brazil rudy@ifpi.edu.br Author Winck, Bruna Raquel 0000-0002-7996-9855 Institut National De La Recherche Agronomique Clermont-Auvergne-Rhônes-Alpe, INRAE, Clermont-Ferrand, France bru.winck@gmail.com Author Bellini, Bruno Cavalcante 0000-0001-7881-9436 Department of Botany and Zoology, Biosciences Center, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil entobellini@gmail.com text Zootaxa 2024 2024-06-21 5471 5 536 554 http://dx.doi.org/10.11646/zootaxa.5471.5.2 journal article 298870 10.11646/zootaxa.5471.5.2 72a15fca-ba8b-4225-ae2a-11a57371331c 1175-5326 12207514 8CEEF654-D2B4-43FB-BB87-DFE8827685DD

TABLE 1. Morphological comparison between the species of the gracilis-group of Dicranocentrus.

	Body dark pigmented areas Ant. IV subapical bifurcated pin projection Smooth chaetae on Ant. I		Smooth chaetae on Ant. II Interocular chaetae		R 1 (reduced)	M 1 (M 2 triangle Basomedian N ° of chaetae (total)) Scales chaetae labial Internal External shape papillae Labral Dorsal head M 0 mac							Dorsal head – group P mac **		Th. II	Th. III Dorsal Abd. I Abd. II mac trunk Abd. III central Abd. IV					Number Type chaetae Ten. Trochanteral organ chaetae Tibiotarsal smooth chaetae *** Tenent hair shape					Ungues apical tooth	Manubriual smooth chaetae		Total n ° N ° of rows spines Dental
Species
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D. pampaensis sp. nov.	Ant. II–IV, frontal head and tibiotarsi	+	2	2	3	S/-	C	S	6–8	4	R	R	+/-	6–7		12	9	5	2	2	5	1	C	±70	-	P	+	-	45–64	3–5
D. albicephalus 16	Ant. I–IV, trunk and proximal appendages	+	?	?	3	C	C	S	6	-	R	R	-	5		12	9	5	2	2	5	1	S	±40	+	A	-	?	±50	4–5
D. assimilis 2,5,8	Ant. I–IV, frontal head, trunk with spots	?	?	?	?	?	?	?	?	?	?	?	-	6		11	9	3	2	1	4	?	?	?	+	A	-	-	-	-
D. bidentatus 12,****	Distal Ant. I–II, Ant. III–IV enterily, frontal head, spots on trunk, tibiotarsi	?	?	?	?	C	C	C	12	-	A	R	-	1		10	6	3	2	2	4	?	?	≤42	+	A	-	+	18	1–2
D. capitaneus 13	Distal Ant. I–II, frontal head, lateral trunk and legs	?	?	?	4–5	?	?	?	9–11	5–8	R	R	-	5		13	9	5	2	3	5	1	?	±100	-	P	+/-	-	46–59	3–4
D. colombiensis 5,9	Distal Ant. Ib, IIb, entire Ant. III–IV, anterior head, tibiotarsi	+	?	?	?	S	C	S	7	6	A	R	-	4		12	9	5	2	2	5	?	?	?	-	A	-	-	±45	4–5
D. cuprum 15	Distal Ant. I–IV, head, trunk and proximal legs	+	?	?	3	S	S	S	6	-	R	R	-	2		12	9	5	2	2	5	1	C	±70	+	A	-	?	±50	2–4
D. deharvengi 10	Ant. III–IV and legs	+	?	?	?	C	C	C	12–14	-	A	A	-	10		14– 15	10	6	2	2	6	?	?	?	-	P	+	-	-	-
D. delamarei 8	Ant. I–III, anterior head and distal legs	?	?	?	?	S	S	S	9	-	A	A	-	4		12	10	5	2	2	5	?	?	?	-	P	-	-?	10–14	1
D. edicitae 6	Specimens depigmented	?	?	?	5	?	?	?	?	?	?	?	+	4		12	7	4	2	2	4	?	?	?	?	?	?	?	?	?