Metasarcus limachii, Benedetti & Pinto-da-Rocha, 2022

Benedetti, Alipio Rezende & Pinto-da-Rocha, Ricardo, 2022, Systematic revision and total evidence phylogenetic analysis of the Andean family Metasarcidae Kury, 1994 (Opiliones: Laniatores), with description of two new genera and twenty new species, Arthropod Systematics & amp; Phylogeny 80, pp. 309-388 : 309

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Metasarcus limachii

sp. nov.

3.46. Metasarcus limachii sp. nov.

Figs 5G View Figure 5 , 10K, L View Figure 10 , 14G, H View Figure 14 , 26A, B View Figure 26 , 31 View Figure 31


MALE: Measurements (n =1) DSW: 6.1; DSL: 6.8; CL: 1.4. FIVL: 14.2. ChL: 2.4. Coloration: (Fig. 26A View Figure 26 ) Yellow background with black spots covering virtually the entire DS; scutal area III, pedipalpus, chelicerae and legs I-III brown. Leg IV black. Dorsum: (Fig. 5G View Figure 5 ) Gamma-P-type DSS, with strongly concave posterior margin of DS. Median elevation of anterior margin of DS with some scattered granules. Ocularium with median depression well marked with large and small granules around the eyes, and in lower concentrations in depression. Carapace with sparse granules. Areas I-IV with small-scattered granules. Area I undivided; with a pair of median tubercles. Areas II unarmed. Area III with a median pair of spines. Area IV with a pair of median tubercles. Lateral margins of DS with a denser concentration of granules. Posterior margin of DS and free tergites I-III with a row of granules. Free tergite III with a long spiniform apophysis, curved laterally and with a ventral short and sharp projection (This curvature is probably an individual anomaly. Furthermore, the first author has already had the opportunity to examine a photograph taken by Dr. Arthur Anker of a live male specimen whose apophysis was straight). Chelicerae: (Fig. 5G View Figure 5 ) Not swollen. Segment I smooth. Segment II with granules concentrated near the fixed finger; finger with three teeth. Segment III with four teeth. Pedipalpus : Trochanter with a ventroapical setiferous tubercle. Femur with two small ventrobasal spines; a ventral row of large spines and a proapical spine. Patella with a proapical spine. Tibia retrolateral iiiIi, prolateral IiIi. Tarsus: retrolateral iIiI, prolateral IiIi/iIiIi. Venter: Coxa I with a median row of 5-6 small setiferous tubercles near the apex. Coxae II-IV with sparse granules. Coxa IV with the lower granules. Genital area with few granules. Free sternites with rows of larger granules. Anal operculum with granules, concentrated in the apical part. Legs: (Figs 5G View Figure 5 , 10K, L View Figure 10 ) Coxa I-II each one with a retrolateral and a prolateral apophysis. Coxa III with dorsal small tubercles. Coxa IV with sparse granules; with 4-5 dorsoapical tubercles; a retrolateral short apophysis, with a tubercle at the base of apophysis, and a retolateral tubercle located more ventrally than apophysis. Trochanters I-III with sparse granules. Trochanter IV with a small probasal spiniform apophysis; a retrobasal and large retroapical spiniform apophyses. Femora I-III unarmed, granular. Femur IV slightly sigmoid, with a large dorsoapical tubercle; granular. Patellae I-IV unarmed. Tarsal segmentation: (n =1) 8, 16, 10, 11. Penis: (Fig. 14G, H View Figure 14 ) VP rectangular, with distal margin straight; straight in lateral view. MS C1-C3 apical long and straight; MS A1 median long and slightly curved; MS B1 sub basal long and slightly curved. Lateral sacs short, apically tapered, with short T3-like microsetae. Stylus with inflated apex, with an elongated ventral projection and tiny projections in the apical portion. Dorsal process long. Promontory convex. - FEMALE: Measurements (n =2) DSW: 5.6-5.7; DSL: 5.3-5.7; CL: 1.1-1.2. FIVL: 11.2-14.0. ChL: 2.0-2.3. (Fig. 26B View Figure 26 ) Areas I-II with three pairs of small tubercles. Area III with a paramedian pair of small spines. Trochanter IV unarmed. Apophysis of free tergite III shorter and without ventral projection. Coloration with less brown spots, highlighting the most yellow body, resulting in a spotty pattern. Area IV with brown pigmentation more obvious. Tarsal segmentation: (n =2) 7-8, 13-15, 9-11, 7-10.


It differs from other species of the genus because by having area I undivided; long spiniform apophysis on free tergite III (Fig. 5G View Figure 5 ); trochanter IV with a probasal, a retrobasal and a retroapical apophyses (Fig. 10K, L View Figure 10 ); DS with yellow background with black spots (Fig. 26A View Figure 26 ).

Derivatio nominis.

The specific epithet of masculine gender, in the genitive form, dedicated Miguel Limachi, from Coleccíon Boliviana de Fauna (CBF), who provided invaluable help with all formalities for collecting in Bolivia.


(Fig. 31 View Figure 31 ) BOLIVIA. La Paz. La Paz-Coroico; Yanacachi.

Material examined.

Type material: Holotype ♂, ' BOLIVIA, La Paz, Yanacachi , 16°23′54.5″S 67°44′11.6″W, 12/XII/2010, R. Pinto-da-Rocha, A. Benedetti, J. Ochoa & A. Saravia leg. (CBF) GoogleMaps - Paratype ♀, ‘ditto’ (MZSP 36991). Paratype ♀, ' BOLIVIA, La Paz, road La Paz-Coroico , 16°13′45″S 67°49′17.1″W, 30/XI/2010, R. Pinto-da-Rocha, A. Benedetti, J. Ochoa & A. Saravia leg. (MZSP 36992) GoogleMaps .