Cryptocellus islacolon, Botero-Trujillo & Carvalho & Florez D. & Prendini, 2021

Botero-Trujillo, Ricardo, Carvalho, Leonardo S., Florez D., Eduardo & Prendini, Lorenzo, 2021, Four New Species of “ Hooded Tick-Spiders ” (Ricinulei, Ricinoididae) from South and Central America, with Clarification of the Identity of Cryptocellus leleupi Cooreman, 1976, American Museum Novitates 2021 (3976), pp. 1-36 : 17-21

publication ID 10.1206/3976.1


persistent identifier

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scientific name

Cryptocellus islacolon

sp. nov.

Cryptocellus islacolon , sp. nov.

Figures 1 View FIGURE 1 , 9–11 View FIGURE 9 View FIGURE 10 View FIGURE 11 , 17C View FIGURE 17 , 18A–D View FIGURE 18 , 19B View FIGURE 19 ; table 1

TYPE MATERIAL: Holotype ♂ ( OUMNH 2010-028 - 001 ), PANAMA: Bocas del Toro: Isla Colón [09°24′N 82°16′W], 24.i–7.iii.2010, M. Sears and R. Wallace, under rotten wood GoogleMaps . Paratypes: 15 ♂ ( OUMNH 2010-028 - 003 to 017), 13 ♀ ( OUMNH 2010-028 - 018–030 ), 1 ♀ ( OUMNH 2010-028 - 002 ), same data as holotype GoogleMaps .

DIAGNOSIS: Cryptocellus islacolon most closely resembles C. goodnighti in the apically bilobate fixed process of the male copulatory apparatus. The fixed process is moderately bilobate (fig. 18B–D), with the retrolateral apical lobe noticeably smaller than the prolateral apical lobe (fig. 18C, D), in C. islacolon , but markedly bilobate (fig. 18E–H), with the retrolateral lobe larger than the prolateral apical lobe (fig. 18E, G, H), in C. goodnighti . Additionally, the fixed process bears a round knob subdistally on the prolateral surface in C. islacolon (figs. 11E, 18A, D), which is absent in C. goodnighti (fig. 18E, H).

ETYMOLOGY: The specific epithet is a noun in apposition taken from the type locality, Isla Colón, in Bocas del Toro, Panama .

DESCRIPTION OF MALE: Based on the holotype ( OUMNH 2010-028 - 001 ) .

Measurements: Total length, 4.49 mm (table 1).

Coloration: Soma and appendages dark red; pedipalps slightly paler. Carapace dorsolateral translucent areas yellowish. Cheliceral manus yellow; fingers and finger dentition reddish.

Setation: Soma and appendages covered with short and medium-sized, translucent, bristlelike setae (figs. 9, 11).

Tegument surface macrosculpture: Tegument without cuticular pits. Carapace and cucullus smooth (figs. 9A, 11A). Coxosternal region predominantly smooth, with fine granulation restricted to anterior and posterior margins of coxae (fig. 9B). Opisthosoma dorsal surface, ventral surface, and pleural membranes smooth (fig. 9C, D). Pedipalp femur predominantly smooth, ventral surface with few subspiniform granules proximally, retrolateral surface finely and densely granular proximally (fig. 11B, C); tibia entirely smooth (fig. 11D). Legs predominantly smooth, with scattered granules on tibiae, metatarsi, and tarsi.

Carapace: Carapace subtriangular, wider than long (table 1), broadest between coxae of legs II and III; lateral margins markedly curved, converging anteriorly (fig. 9A); anterior margin linear in dorsal aspect, sublinear in frontal aspect; posterior margin procurved; median longitudinal sulcus shallow, partial; paired lateral depressions present near lateral margins, adjacent to coxae of legs II; dorsolateral translucent areas very large, visible in dorsal and lateral aspects, distinctly convex and entirely smooth, aligned with intersection between coxae of legs I and II.

Cucullus: Cucullus trapezoidal, slightly wider than long (table 1); lateral margins diverging slightly ventrally (fig. 11A); ventral margin predominantly linear in anterior aspect, with shallow median concavity in ventral aspect.

Chelicerae: Movable finger longer than fixed finger, not widened; mucron sharp; tooth row comprising 10 or 11 small teeth. Fixed finger tooth row comprising four small to medium-sized teeth and one markedly larger distal tooth.

Coxosternal region: Tritosternum small, tuberculate, not abutting coxae of legs I (fig. 9B); coxae of legs II–IV abutting one another medially along entire length; coxae of legs II, anterior and posterior margins not perpendicular to median axis, posterior margin forming obtuse angle medially; coxae of legs II–IV progressively decreasing in length (table 1); suture between coxae of legs II longer than sutures between coxae of legs III and IV.

Opisthosoma: Opisthosoma oval, longer than wide (fig. 9C, D, table 1), broadest at tergite XII. Median sclerites of tergites XI–XIII each with paired, shallow submedian depressions, lateral margins converging posteriorly on XI and, to lesser extent, XII, subparallel on XIII; of tergites XI–XIII wider than long (table 1); of tergite XIII, lateral margins forming right angle with posterior margin, posterior corners protruding laterally. Sternites XI–XIII each with paired submedian depressions similar to tergites (fig. 9D). Pygidium basal segment, posterior margin shallowly emarginate dorsally, entire ventrally.

Pedipalps: Femur robust (table 1), dorsal surface convex. Tibia longer than femur (table 1), entirely linear (fig. 11B), markedly swollen proximally, rest of segment noticeably narrower (fig. 11D); elevated oval tubercles absent. Movable finger longer and more robust than fixed finger.

Legs: Leg II longest; I–IV similar in width, no segments swollen (table 1). Legs without modifications except those associated with copulatory apparatus. Leg III metatarsus moderately concave dorsodistally; metatarsal process situated basally near tibia, tapering and curving retrolaterally, apex acute and dorsoventrally compressed (fig. 11E, F); lamina cyathiformis longer than deep, with rounded apex (fig. 11F).

Copulatory apparatus: Fixed process robust; proximal two thirds of ventral surface predominantly linear in lateral aspect (figs. 11E, 17C); basal part distinctly bent, ventral margin markedly curved in lateral aspect (fig. 18A); proventral submedian ledge well developed, semicircular in dorsal aspect (fig. 18B); distal part broad in ventral aspect (fig. 18D); apex moderately bilobate, retrolateral lobe smaller than prolateral lobe (fig. 18B–D); prolateral surface with rounded knob subdistally (fig. 18A, D). Movable process similar in length to fixed process, narrowing distally; apex simple, entire.

SUPPLEMENTARY DESCRIPTION OF FEMALE: Based on the paratype ( OUMNH 2010-028 - 002 ). Resembles male except as noted .

Measurements: Total length, 4.17 mm (table 1).

Coloration: Predominantly intense red, paler than male.

Coxosternal region: Suture between coxae of legs II 2× length of sutures between coxae of legs III and IV (fig. 10B, table 1).

Opisthosoma: Opisthosoma more rounded than in male (fig. 10C, D). Lateral margins of median sclerites converging posteriorly on tergite XI and, to lesser extent, XII, subparallel on XIII.

Pedipalps: Femur ventral surface smooth, without subspiniform granules (fig. 10B).

Spermathecae: Spermathecae heavily sclerotized, approximately as deep as wide (fig. 19B); adjacent but separated; internal cavity convoluted, pattern of convolution bilaterally symmetrical. Anterior genital lip subtriangular; posterior genital lip subtrapezoidal, wider than deep (fig. 19B).

DISTRIBUTION: Cryptocellus islacolon is known only from the type locality, Isla Colón, in the province of Bocas del Toro, Panama (fig. 1) .


Departamento de Geologia, Universidad de Chile