Charinus alagoanus, Miranda & Giupponi & Prendini & Scharff, 2021

Miranda, Gustavo Silva de, Giupponi, Alessandro P. L., Prendini, Lorenzo & Scharff, Nikolaj, 2021, Systematic revision of the pantropical whip spider family Charinidae Quintero, 1986 (Arachnida, Amblypygi), European Journal of Taxonomy 772, pp. 1-409 : 89-96

Charinus alagoanus sp. nov.

urn:lsid:zoobank.org:act:0109E9FB-0C24-436A-A96C-8B5B530F0AD2

Figs 10G–H , 43–46 ; Table 4

Diagnosis

This species may be separated from other Charinus in eastern South America by means of the following combination of characters: median and lateral eyes present ( Fig. 44A ); cheliceral claw with eight teeth ( Fig. 10G–H ); tibia of leg I with 23 articles, tarsus I with 41 articles; leg IV basitibia with three pseudoarticles; distitibia sc and sf series each with four trichobothria.

Etymology

Adjective refering to the Brazilian state of Alagoas in which the type locality is located.

Type material

Holotype BRAZIL • ♀; Alagoas, Murici, Estação Ecológica de Murici ; 09°18′23.58″ S, 35°56′50.53″ W; 26–29 Jul. 2012; C.S. Costa, D.M.C. de Alcântara, P. de S. Dias and S.S. Nihei leg.; MNRJ 9294 .

Paratype BRAZIL • 1 ♀; Alagoas, Murici, Estação Ecológica de Murici, UFAL , Barranco ; 09°15.186′ S, 35°51.017′ W; 200 m a.s.l.; 17 Aug. 2006; MNRJ 9295 .

Description

CARAPACE. Carina ventral to lateral eyes, closer to carapace margin; frontal process large, subtriangular, not visible in dorsal view ( Fig. 44C ). Median eyes and median ocular tubercle present ( Fig. 44C ); median tubercle shallow, slightly higher than carapace surface, with pair of small setae; lateral eyes well developed, pale, small seta posterior to each lateral ocular triad.

STERNUM. Tritosternum projected anteriorly into small blunt tubercle, surpassing base of pedipalp coxae, with typical setation ( Fig. 44B ); medial platelet (tetrasternum) and third platelet (pentasternum) with single convex platelet, with pair of large setae anteriorly, and several small setae posteriorly; metasternum with anterior setae in membranous region; two or three setae, forming longitudinal row, posteriorly.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum slightly convex ( Fig. 45B ), with several setae on surface and along margin ( Fig. 45A–C ); sucker-like gonopods unsclerotized basally ( Fig. 45A ); gonopods with dorsal projection on retrolateral side ( Fig. 45D–E ); laterodistal margin of genital operculum with slit sensilla ventrally ( Fig. 45F ). Male unknown.

CHELICERAE. Small tooth in retrolateral row of basal segment ( Fig. 10H ); prolateral surface with row of around seven small setae, from ventral to dorsal surface; two setae, prolateral and retrolateral on dorsodistal border margin near membranous region of claw; claw with eight teeth and row of setae only present medially on retrolateral surface ( Fig. 10G–H ).

PEDIPALPS. Coxa with one or two small setae on rounded carina and three setae on anterior margin. Femur with three distinct setiferous tubercles proximal to spine 1 ( Fig. 44E ); primary series with four dorsal spines and three ventral spines ( Fig. 44E–F ); large ventral spine proximal to spine 1. Patella with four dorsal spines ( Fig. 44E ); large setiferous tubercle distal to spine I, about one-third length of spine I; three ventral spines decreasing in size ( Fig. 44F ); setiferous tubercle between spine I and distal margin. Tibia with two dorsal spines; ventral spine in distal half; two long setae between spine and distal margin. Pedipalp tarsus with two dorsal spines, proximal spine half length of distal spine ( Fig. 44D ). Cleaning brush with 32–36 setae.

LEGS. Tibia of leg I with 23 articles; tarsal organ situated near base of tarsal claw ( Fig. 46A, C–D ); rod sensilla composed of four setae in shallow groove ( Fig. 46B, E ); tarsus I with 41 articles. Leg IV basitibia with three pseudo-articles; trichobothrium bt situated medially on article; distal apex of basitibial pseudo-articles with dark, denticulate projection; distitibia trichobothrium bc situated closer to sbf than to bf; sc and sf series each with four trichobothria; distitarsus with distinct white annulus distally on first article.

Measurements

See Table 4 .

Distribution

Known only from the type locality.

Natural history

Found under fallen tree trunks and stones in tropical forest.

Figures

Fig. 10. Charinus Simon, 1892, chelicerae, prolateral and retrolateral views. A–B. Charinus loko sp. nov. (SMNS). C–D. Charinus miskito sp. nov. (SMNS). E–F. Charinus mocoa sp. nov. (SMF 68). G–H. Charinus alagoanus sp. nov. (MNRJ 9295). I–J. Charinus renneri sp. nov. (MNRJ 9198). K–L. Charinus madagascariensis Fage, 1954 (MNHN). Scale bars: 0.5 mm.

Fig. 43. Map plotting known distributions of species of Charinus Simon, 1892 in eastern South America, with inset for southeastern Brazil.

Fig. 44. Charinus alagoanus sp. nov. (MNRJ 9294), general morphology, ♀. A. Habitus, dorsal view. B. Sternum, ventral view. C. Frontal process. D. Pedipalp tarsus, frontal view. E. Pedipalp, dorsal view. F. Pedipalp, ventral view. Scale bars: A, E–F = 1 mm; B, D = 0.5 mm; C = 0.25 mm.

Fig. 45. Charinus alagoanus sp. nov. (MNRJ 9295), female gonopod and genital operculum. A. Suckerlike gonopod, dorsal view.B. Genital operculum, ventral view. C. Gonopods, posterior view.D. Aperture on sinistral side of sucker-like gonopod, dorsal view. E. Projection on sinistral side of sucker-like gonopod, posterior view. F. Gland opening near lateral margin of genital operculum.

Fig. 46. Charinus alagoanus sp. nov. (MNRJ 9295), antenniform leg I, ♀. A. Apex of distal article. B. Distal segment of tarsus, lateral view. C. Apex of distal article of tarsus showing claw and tarsal organ. D. Detail of claw and tarsal organ. E. Rod sensilla and olfactory setae.

Tables

Table 4 (continued on next five pages). Measurements of all eastern South American species of Charinus Simon, 1892.

							Pedipalp								Leg IV
Species	Additional information	Source	Sex	Carapace length	Carapace width	Femur length	Patella length	Tibia length	Tarsus length	Claw length	Femur I length	Femur	Basitibia article I	Basitibia article II	Basitibia article III	Basitibia article IV	Distitibia	Basitarsus	Other tarsal articles
C. acaraje	MNRJ 9297	This work	prob.♂ no gonopod	3.60	5.19	4.00	3.84	1.88	1.25	1.04	12.56	7.28	3.56	1.25	1.31	1.64	3.80	2.00	1.20
C. acaraje	MNRJ 9297	This work	♀	2.25	3.72	2.45	2.38	1.25	0.80	0.80	8.30	5.38	2.34	0.75	0.88	1.15	2.66	1.50	0.98
C. acaraje	MNRJ 9297	This work	♀	2.25	4.20	3.00	2.92	1.50	0.94	0.94	10.90	6.06	–	–	–	–	–	–	–
C. acaraje	MNRJ 9297	This work	♀	3.06	4.38	3.08	2.92	1.25	0.94	1.00	10.77	6.06	2.80	0.94	1.00	1.30	3.06	1.70	1.00
C. acaraje	MNRJ 9297	This work	prob.♂ no gonopod	3.69	5.13	4.60	4.50	1.84	1.19	1.09	13.59	7.60	3.40	1.25	1.20	1.55	3.68	2.19	1.25
C. acaraje	MNRJ 9297	This work	prob.♂ no gonopod	3.88	5.38	4.44	4.38	1.97	1.25	1.25	13.46	8.20	3.90	1.35	1.45	1.88	4.10	2.16	1.13
C. acaraje	MNRJ 09125	This work	♀	2.60	3.65	2.20	2.08	1.04	0.80	0.76	7.52	5.00	2.24	0.80	0.68	1.00	2.60	1.41	0.84
C. alagoanus sp. nov.	MNRJ 9294	This work	♀	2.76	4.00	2.13	2.03	1.16	0.80	0.71	6.32	4.35	2.31	0.60	0.78	–	2.38	1.18	0.75
C. alagoanus sp. nov.	MNRJ 9295	This work	♀	2.80	3.76	2.44	2.40	1.25	0.91	3.70	7.36	4.75	2.63	0.69	0.88	–	2.63	1.25	0.83
C. apiaca sp. nov.	MNRJ 9286	This work	♀	4.13	5.75	4.50	4.50	1.88	1.35	1.20	12.82	7.60	3.80	0.92	1.40	1.96	3.44	1.43	1.08
C. asturius	MZSP 18930 holotype	Pinto-da-Rocha et al. 2002	♂	3.80	5.45	–	7.30	–	–	–	9.50	5.90	3.30	0.75	1	1.20	2.60	1.20	1.00
C. asturius	MZSP 18930 paratype	Pinto-da-Rocha et al. 2002	♀	2.60	3.60	–	2.30	–	–	–	5.35	3.60	1.75	0.45	0.5	0.70	1.75	0.75	0.75
C. asturius	MZSP 18934 female	Pinto-da-Rocha et al. 2002	♀	3.80	5.50	–	4.60	–	–	–	9.25	6.00	3.30	0.90	1.1	1.25	2.75	1.20	1.10
C. brasilianus	SMF 25397 paratype	This work	♀	3.00	4.50	2.55	2.45	1.15	0.84	0.72	6.80	–	–	–	–	–	–	–	–
C. brasilianus	SMF 25397 paratype	This work	♂	3.05	4.45	3.05	3.10	1.20	0.80	0.60		–	–	–	–	–	–	–	–
C. brasilianus	SMF 25397 paratype	This work	♂	3.68	5.28	7.50	7.50	1.60	0.88	0.90	7.95	–	–	–	–	–	–	–	–
C. brasilianus	SMF 25397 paratype	This work	♂	2.88	5.19	5.69	5.94	1.44	1.00	0.65	7.69	–	–	–	–	–	–	–	–
C. brasilianus	SMF 25397 paratype	This work	♂	3.44	5.52	6.67	6.79	1.80	1.10	0.80	8.97	–	–	–	–	–	–	–	–
C. brasilianus	MNRJ 9271 Santa Teresa	This work	♂	3.25	4.90	6.40	6.32	1.44	0.94	0.75	8.10	4.65	2.34	0.72	0.75	1.13	2.63	1.05	0.80
C. brasilianus	MNRJ 9271 Santa Teresa	This work	♀	3.32	5.00	2.96	3.08	1.44	0.93	0.82	7.84	5.00	–	–	–	–	–	–	–