Metasarcus kurosawai, 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 kurosawai

sp. nov.

3.45. Metasarcus kurosawai sp. nov.

Figs 5F View Figure 5 , 10I, J View Figure 10 , 14E, F View Figure 14 , 25G, H View Figure 25 , 31 View Figure 31


MALE: Measurements (n =2) DSW: 4.0; DSL: 4.0-4.5 (4.5); CL: 1.5 FIVL: 9.2-10.0 (9.2). ChL: 3.3-3.8 (3.8). Coloration: (Fig. 25G View Figure 25 ) Chelicerae, trochanter IV and basal portion of femur IV orange. Pedipalpus , legs I-III, remaining parts of leg IV and dorsal scutum black. Dorsum: (Fig. 5F View Figure 5 ) Kappa- type DSS, with straight posterior margin of DS; constriction I shallow, constriction II absent, mid-bulge slightly larger than carapace and coda undefined, coalescing with mid-bulge. Sparse row of granules on the anterior margin of DS, including the median elevation. Clusters of granules concentrated on the lateral of the carapace and the posterior region to ocularium. Ocularium with depression well marked, unarmed and with granules concentrated near the eyes. Areas I-IV with a few scattered granules. Area I divided by the scutal grooves I and II; with a pair of median tubercles. Area II invading the area I; unarmed. Area III with a median pair of large spines, whose base elevation is irregularly covered by small tubercles. Area IV unarmed. Lateral margins of DS covered with granules. Posterior margin of DS and free tergites I-III with a row of granules. Chelicerae: (Fig. 5F View Figure 5 ) Swollen. Segment I with few granules. Segment II with small setiferous granules; finger with twelve small teeth. Segment III with five teeth. Pedipalpus : Trochanter with a long ventroapical acuminate setiferous tubercle. Femur with a ventral row of six setiferous tubercles of irregular size, most long and two short. Patella with a proapical small tubercle, whose base is wider than tall. Tibia: retrolateral iIiIii, prolateral IiIi. Tarsus: retrolateral iIiIi, prolateral IiIii. Venter: Coxa I with a median row of five setiferous tubercles. Coxa II with a row of 5-6 setiferous tubercles in the basal portion. Coxae III-IV with small sparse granules. Genital area, free sternites and anal operculum with scattered granules. Legs: (Figs 5F View Figure 5 , 10I, J View Figure 10 ) Coxae I-III each one with a prolateral and a retrolateral apophysis. Coxa IV covered with setiferous granules. Trochanters I-IV unarmed and granular. Femora-patellae I-IV unarmed and with few small granules. Tibiae I-IV unarmed, with sparse granules. Tarsal segmentation: (n =2) 8, 15-17 (17), 10, 10-12 (12). Penis: (Fig. 14E, F View Figure 14 ) VP rectangular, with distal margin straight; straight in lateral view. MS C1-C3 (sub)apical long and straight; MS A1 median long and straight (smaller than MS C and MS B); MS B1 basal long and straight; MS D1 very short, near MS C3, placed more ventrally; MS E1 very short, near MS C1, placed more ventrally. Lateral sacs short and robust, with short T3-like microsetae. Stylus long with truncated apex and small apical projections. Dorsal process absent. Promontory truncated/straight. - FEMALE: Measurements (n =2) DSW: 4.0; DSL: 4.2-4.3; CL: 1.4; FIVL: 8.6-9.0; ChL: 1.0-1.7 (Fig. 25H View Figure 25 ). Chelicerae small, not swollen. Tarsal segmentation: (n =2) 7, 15, 10, 11.


Similar to Metasarcus beni sp. nov. because the ocularium is unarmed, area I divided, a pair of spines in the area III (Fig. 5F View Figure 5 ) and male femur IV slender and without major rows of tubercles (Fig. 10I, J View Figure 10 ). It differs from M. beni sp. nov. because kappa type DSS, coxa III with two apophyses (Fig. 5F View Figure 5 ), femur IV without a distal retrodorsal small apophysis (Fig. 10I, J View Figure 10 ) and by having chelicerae orange colored (Fig. 25G View Figure 25 ).

Derivatio nominis.

The specific epithet of masculine gender, in the genitive form, dedicated to the Japanese filmmaker, producer and screenwriter Akira Kurosawa (黒澤明; 1910-1998).


(Fig. 31 View Figure 31 ) BOLIVIA. La Paz. Zongo.

Material examined.

Type material: Holotype ♂, ' BOLIVIA, La Paz, Zongo , 16°10′32.4″S 68°08′11.9″W, 10/XII/2010, R. Pinto-da-Rocha, A. Benedetti & A. Saravia leg. (CBF) GoogleMaps - Paratype ♀, ‘ditto’ (CBF). Paratype ♀, ‘ditto’ (MZSP 76551). Paratype 1 ♂ ' BOLIVIA, La Paz, Road La Paz-Coroico , 16°12′57″S 67°49′24.7″W, 30/XI/2010, R. Pinto-da-Rocha, A. Benedetti, J. Ochoa & A. Saravia leg. (MZSP) GoogleMaps .