Cryptocellus canutama, 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 : 5-9

publication ID 10.1206/3976.1


persistent identifier

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scientific name

Cryptocellus canutama

sp. nov.

Cryptocellus canutama , sp. nov.

Figures 1 View FIGURE 1 , 2A–C View FIGURE 2 , 3 View FIGURE 3 , 4 View FIGURE 4 , 17A View FIGURE 17 ; table 1

TYPE MATERIAL: Holotype ♂ ( CHNUFPI 2215 ), BRAZIL: Amazonas : Canutama, near road BR-230, 07°30′41.5″S 63°23′28.3″W, 78 m, 22.x.2016, L.S. Carvalho GoogleMaps . Paratypes: 1 ♂ ( CHNUFPI 2502 ), 1 ♂ ( UFMG 24332 View Materials ), deutonymph ( CHNUFPI 3387 ), same data as holotype GoogleMaps .

DIAGNOSIS: Cryptocellus canutama resembles C. adisi , C. canga , C. jamari , and C. tarsilae in the presence of a moundlike excrescence posteromedially on the carapace (fig. 3A). Cryptocellus canutama most closely resembles C. jamari in the fusion of the median sclerites of tergites X and XI (figs. 3C, 4B), a character unique to the two species, and in the presence of a pair of submedian moundlike excrescences on median sclerite of tergite XI of the male (fig. 3C), a character also observed in both sexes of C. adisi . The male of C. canutama can be distinguished from that of C. jamari by the moundlike excrescences of tergite XI, which are smaller and less prominent than the posteromedian excrescence of the carapace, in C. canutama , but well developed, only slightly smaller than the posteromedian excrescence, in C. jamari . Additionally, the fixed process of the male copulatory apparatus of C. canutama is crooked, weakly sclerotized, and flexible subbasally (figs. 4E, 17A), able to bend prolaterally (fig. 17A), and unmodified basally whereas the copulatory apparatus of C. jamari is almost straight, heavily sclerotized, and inflexible subbasally, with a distinct ventral swelling basally.

ETYMOLOGY: The specific epithet is a noun in apposition taken from the type locality, Canutama , in Amazonas, Brazil .

DESCRIPTION OF MALE: Based on the holotype ( CHNUFPI 2215 ) .

Measurements: Total length, 3.68 mm (table 1).

Coloration: Soma and appendages reddish (fig. 2A, B); pedipalps slightly paler. Carapace dorsolateral translucent areas yellow. Cheliceral manus yellow; fingers and finger dentition reddish.

Setation: Soma and appendages covered with short, translucent, bristlelike setae, slightly expanded, especially on carapace and dorsal surface of opisthosoma (fig. 3A, C), but fine, hairlike on coxosternal region, pedipalps, ventral half of cucullus, ventromedial surface of opisthosoma, and leg tarsi (e.g., figs. 3B, D, 4A, F).

Tegument surface macrosculpture: Tegument without cuticular pits. Carapace entirely and densely covered with conspicuous, round, iridescent granules (fig. 3A). Cucullus , coxosternal region, and legs with granulation similar to carapace, except for smooth medial surface on coxae of legs IV (figs. 3B, 4A, C, D). Opisthosoma dorsal surface with granulation similar to carapace, except along outer margin of opisthosoma, along which dorsal sclerites are predominantly smooth (fig. 3C); ventral surface sparsely granular (fig. 3D); lateral membranes granular. Pedipalp trochanter 1 and, to lesser extent, trochanter 2 granular; femur densely granular proximally and ventrosubmedially (fig. 4F); tibia entirely smooth.

Carapace: Carapace trapezoidal, as long as wide (table 1), broadest between coxae of legs II and III; lateral margins curved, converging anteriorly (fig. 3A); anterior margin linear in dorsal aspect, sublinear in frontal aspect; posterior margin procurved; median longitudinal sulcus shallow, partial, terminating at base of posteromedian moundlike excrescence; paired lateral depressions present near lateral margins, adjacent to coxae of legs II; dorsolateral translucent areas well defined, visible in lateral aspect but not in dorsal aspect, glabrous and planar, aligned with intersection between coxae of legs I and II.

Cucullus: Cucullus trapezoidal, wider than long (table 1); lateral margins diverging ventrally (fig. 4A); ventral margin predominantly linear in anterior aspect, slightly concave in ventral aspect.

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

Coxosternal region: Tritosternum small, tuberculate, not abutting coxae of legs I (fig. 3B); coxae of legs II–IV abutting one another medially along entire length; coxae of legs II, anterior and posterior margins almost perpendicular to median axis, not forming angle medially; coxae of legs II–IV progressively decreasing in length (table 1); suture between coxae of legs III slightly shorter than sutures between coxae of legs II and IV.

Opisthosoma: Opisthosoma oval, longer than wide (fig. 3C, D, table 1), broadest at tergite XII. Median sclerites of tergites X and XI fused, lateral sclerites separated (fig. 4B); median sclerites of tergites XI–XIII each with paired, shallow submedian depressions, lateral margins converging posteriorly on XI, subparallel on XII and XIII; of tergites XI, XII and, to lesser extent, XIII, wider than long (table 1), of XI anteriorly with obscure pair of low, moundlike excrescences submedially; of tergite XIII, lateral margins sinuous, forming right angle with posterior margin, posterior corners slightly protruding laterally. Sternites XI–XIII each with paired submedian depressions similar to tergites (fig. 3D). Pygidium basal segment, posterior margin with shallow V-shaped notch dorsally, entire ventrally.

Pedipalps: Femur robust (table 1), dorsal surface convex. Tibia longer than femur (table 1), entirely linear (fig. 4F), slightly swollen proximally, rest of segment narrower in dorsal aspect and, to lesser extent, lateral aspect; 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 I–IV femora, dorsal and ventral surfaces each with moderate projection proximally, protecting articulation with trochanter. Legs without modifications except those associated with copulatory apparatus. Leg III metatarsus with moderate concavity dorsodistally; metatarsal process situated basally near tibia, tapering and curving retrolaterally, apex dorsoventrally compressed and truncate (fig. 4C, D); lamina cyathiformis approximately as deep as long, with rounded apex (fig. 4D).

Copulatory apparatus: Fixed and movable processes U-shaped. Fixed process crooked, weakly sclerotized, and flexible subbasally (figs. 4E, 17A), able to bend prolaterally (fig. 17A); ridges, basal swelling, or other modifications absent; apex pointed. Movable process similar in length to fixed process, narrowing distally; apex simple, entire.

FEMALE: Unknown.

DISTRIBUTION: Cryptocellus canutama is known only from the type locality, Canutama , in the state of Amazonas, Brazil (fig. 1) .