Kingsleyinae Bott, 1970

Nobre, Paulo Henrique Pereira, Nascimento, Carlito Alves do, Martins, Carlos Antonio Muniz, Araújo, Juliana Gonçalves de, Nascimento, Whandenson Machado do & Pinheiro, Allysson Pontes, 2024, Update on the geographical distribution of freshwater crabs of the Pseudothelphusidae family in the semi-arid region of northeastern Brazil, Papéis Avulsos de Zoologia 64, pp. 1-9 : 2-4

Subfamily Kingsleyinae Bott, 1970

Genus Fredius Pretzmann, 1967

Fredius ibiapaba Santos,Tavares,Silva, Cervini, Pinheiro & Santana, 2020 ( Fig. 1 ).

New records: BRAZIL – Ceará: Parque Estadual das Carnaúbas, municipality of Granja, district of Timonha ; 03°18′14.11″S, 041°09′56.74″W; 760 m altitude; 19.VII.2021; J.G. Araújo, C.A.M. Martins, C.A. Nascimento & P.H.P. Nobre; 2 males e 1 female (LACRUSE 304).

Additional material: Fonte do caranguejo, in the city of ViÇosa do Ceará; 03°33′39.35″S, 041°05′14.60″W; 600 m; 20.VII.2021; J.G. Araújo, C.A.M. Martins, C.A. Nascimento & P.H.P. Nobre ; 1 male (LACRUSE 305).

Distribution: Brazil, state of Ceará.

Previous records: Planalto da Ibiapaba , municipality of Ipu, state of Ceará, in the following localities: sítio Gameleira (04°17′42.00″S, 040°44′48.00″W), sítio Gameleira Quintal (04°17′042.00″S, 040°44′43.00″W) ; cachoeira do sítio IpuÇaba (04°17′56.00″S, 040°44′35.00″W); olho d′água do sítio IpuÇaba (04°18′05.00″S, 040°44′43.00″W); olho d′água da Cinta (04°18′34.00″S, 040°44′48.00″W); sítio Caranguejo (04°18′51.00″S, 040°44′48.00″W); Santa Cruz I (04°19′40.00″S, 040°45′09.00″W); Santa Cruz II (04°19′40.00″S, 040°45′09.00″W); olho d′água da Taperinha (04°20′18.00″S, 040°45′23.00″W); riacho da Taperinha (04°20′33.00″S, 040°45′32.00″W); and Santa Luzia (04°22′11.00″S, 040°45′52.00″W) (Santos et al., 2020a). Planalto da Ibiapaba, municipality of ViÇosa do Ceará, state of Ceará, fonte do Caranguejo (03°33′43.20″S, 041°5′9.06″W) (Magalhães et al., 2005; Santos et al., 2020a). Municipality of BraganÇa ,state of Pará (Mantelatto et al., 2022) .

Remarks: Three specimens of F. ibiapaba were found in Parque Estadual das Carnaúbas inside burrows approximately 50 centimeters deep ( Fig. 3A, B ), constructed in a small forested area with humid soil at approximately 760 m above sea level ( Fig. 3 C-E). This new occurrence area is approximately 29.9 km north of the nearest recorded occurrence point ( Fig. 4B ), located at Fonte do Caranguejo in the municipality of ViÇosa do Ceará, and approximately 122.17 km north of the type locality at Sítio Santa Cruz, municipality of Ipu. Among the collect- ed specimens, two are males (male 1: CW = 43.42 mm, PW = 13.20 mm, LP = 34.47 mm; male 2: CW = 46.12 mm, PW = 14.24 mm, and LP = 37.55 mm) and one female (CW = 39.66 mm, PW = 17.62 mm, and LP = 29.01 mm) LACRUSE 304 ( Fig. 5C, D ).

The new site showed few signs of anthropic intervention, with dense vegetation, humid soil rich in organic matter, and well shaded conditions, favoring the occurrence of the species. However, all these factors were present only in a small area, limiting the distribution of specimens around a headwater. Additionally, this area exhibits few signs of anthropic pressures.

At Fonte do Caranguejo,we found only one male specimen LACRUSE 305 (CW = 35.05 mm, AW = 11.34 mm, and LP = 26.64 mm) of F. ibiapaba ( Fig. 5E ) inside a burrow approximately 40 cm deep ( Fig. 5B, C ), constructed under rocks in the humid soil of a small forested area around the spring near the rocky wall ( Fig. 6A ). Due to its proximity to the urban area, the site shows strong evidence of human presence,such as solid waste ( Fig. 6 D-F).

Despite the small number of specimens collected, we observed the presence of several burrows in the humid soil of the visited sites, with openings of various diameters, indicating the presence of other crabs. We also collected some juvenile specimens that were later released.

Figures

Figure 1. Right gonopod (G1) of Fredius ibiapaba Santos,Tavares,Silva,Cervini,Pinheiro & Santana (2020) in external,lateral,mesialand pleon views respectively. (A-D) Gonopod of F. ibiapaba collected in the Parque Estadual das Carnaúbas in the municipality of Granja (LACRUSE 304); (E-H) Gonopod of F. ibiapaba collected at Fonte do Caranguejo in the city of Viçosa do Ceará (LACRUSE 305); (I-K) Gonopod of F.ibiapaba collected at sítio Caranguejo in the municipality of Ipu (LACRUSE 151). Scale bar = 2 mm.

Figure 3. Habitat of Frediusibiapabain Parque Estadualdas Carnaúbas.(A) Adult of F.ibiapaba; (B)burrow of F.ibiapababuilt inmoist soil;(C) litterin the soilat the place of occurrence;(D, E) panoramic view of the park.

Figure 4. (A) Distribution of Pseudothelphusidae in northeastern Brazil; (B) previous records and new occurrences of Fredius ibiapaba; (C) previous occurrence of Kingsleya attenboroughi; (D) new occurrence of K. attenboroughi; (E) previous occurrence of Kingsleya parnaiba. (B-E) Digital Elevation Model (DEM) showing the altimetry of the Pseldothelphusidae areas of northeastern Brazil (warm colors indicate higher elevations).Map created in Qgis free software 3.16.14.

Figure 5. Dorsal view of specimens of Frediusibiapaba and Kingsleya attenboroughi. (A) Adult male of K.attenboroughi from riacho Jacaré (LACRUSE 306); (B) adult female K. attenboroughi from riacho Jacaré (LACRUSE 306); (C) adult male of F.ibiapaba from Parque Estadual das Carnaúbas (LACRUSE 304); (D) adult female of F.ibiapabafrom Parque Estadualdas Carnaúbas (LACRUSE 304);(E)adult male of F.ibiapabada Fontedo Caranguejoin the municipality ofViçosa doCeará (LACRUSE 305).Scale bar = 1 cm.

Figure 6. Habitat of Fredius ibiapaba at Fonte do Caranguejo in the municipality of Viçosa do Ceará. (A) Panoramic view of the place of occurrence; (B) juvenile by F.ibiapaba; (C) burrow of F.ibiapaba built indamp soil;(D,F) traces of strong human presence at Fontedo Caranguejo.