Ctenorillo papagayoensis Carpio-Díaz, Borja-Arrieta & Campos-Filho, 2023

Carpio-Díaz, Yesenia M., López-Orozco, Carlos Mario, Borja-Arrieta, Ricardo, Gutierrez-Estrada, Miguel, Campos-Filho, Ivanklin Soares, Sfenthourakis, Spyros, Taiti, Stefano, Moreno, Jhon Cesar Neita, Bermúdez, Adriana, Navas-S., Gabriel R. & Bichuette, Maria Elina, 2023, The genus Ctenorillo Verhoeff, 1942 (Oniscidea, Armadillidae) from Colombia: new records, new species, and conservation comments, Tropical Zoology (trop. Zool.) 36 (3 - 4), pp. 53-84 : 72-74

Ctenorillo papagayoensis Carpio-Díaz, Borja-Arrieta & Campos-Filho n. sp.

Figures 1,14-16

urn:lsid:zoobank.org:act:11B0915D-7619-4C61-AF01-C3B62C6A8680

Material examined

COLOMBIA: Holotype ♂ (parts in micropreparations) (ICN-CR-is 72), Santander, Bolívar, Los Papagayos cave , 5°58’47.65”N 73°46’24.44”W, 22 June 2008, leg. D. Casallas and M. Hoyos. Paratypes: 1 ♂, 1 ♀ (parts in micropreparations) (ICN-CR-is 72), same data as holotype .

Description

Maximum length: male 5 mm, female 5.5 mm. Color brown with typical pale muscular insertions; pereonites 1-7 median portion and epimera, and pleon strongly pigmented. Dorsum covered with short rounded tubercles, arranged as follows ( Figure 14A,B ): vertex of cephalon with 12 tubercles in three rows, anterior row with four tubercles, middle row with two tubercles, posterior row with six tubercles; pereonite 1 with four tubercles on anterior row, six tubercles on middle row, and two tubercles on posterior row; pereonites 2-7 with two tubercles on anterior row, six tubercles on posterior row; pleonites 3-5 plus telson smooth. Dorsal surface with short triangular scale-setae ( Figure 14C ). Pereonites 1-7 epimera with one line of noduli laterales per side inserted on postero-lateral surface of second outer tubercle. Cephalon ( Figure 14 D-F) with frontal shield rectangular, not protruding above vertex, and slightly bent over vertex; eyes of 16 ommatidia. Pereonite 1 epimera grooved on lateral margins for about two thirds of length, inner lobe of schisma rounded, not extending beyond posterior margin of outer lobe; pereonites 2-7 rectangular; pereonite 2 with ventral lobe subtriangular, distal margin rounded, not extending beyond posterior margin of epimera ( Figure 14A,F,G ). Pleonites 3-5 epimera rectangular ( Figure 14H,I ). Telson ( Figure 14H ) hourglass-shaped, proximal part broader than distal part, straight distal margin. Antennula ( Figure 14J ) of three articles, proximal and distal articles subequal in length, distal article bearing five apical aesthetascs. Buccal pieces ( Figure 15 A-E) as in Ctenorillo binomio n. sp. Pereopod 1 carpus with antennal grooming brush transverse, distal setae apically cleft; dactylus with ungual and dactylar seta simple. Uropod ( Figure 15F ) protopod trapezoidal, flattened, basal part enlarged, medial margin concave; exopod short, inserted dorsally below distinct lobe near median margin. Pleopods 1-5 exopods with monospiracular lungs.

Male: Pereopod 1 ( Figure 16A ) with no particular modifications. Pereopod 7 ( Figure 16B ) ischium with rostral surface slightly depressed distally. Genital papilla as in Figure 16C . Pleopod 1 ( Figure 16D ) exopod triangular, longer than wide, outer margin slightly concave, outer and inner margins bearing many short setae; endopod twice as long as exopod, distal part tapering bearing short setae on medial margin. Pleopod 2 ( Figure 16E ) exopod triangular, outer margin concave bearing many short setae. Pleopod 3 and 4 exopods as in Figure 16F,G , respectively. Pleopod 5 exopod ( Figure 16H ) triangular, outer margin almost straight bearing many short setae.

Etymology

The new species is named after of the locality where the specimens were collected: Los Papagayos cave.

Remarks

Ctenorillo papagayoensis sp nov. differs from all other species of the genus in the absence of tubercles on pleon and telson, and in the number and arrangement of the dorsal tubercles of the cephalon and pereon.

Figures

Figure 14. Ctenorillo papagayoensis Carpio-Díaz, Borja-Arrieta & Campos-Filho n. sp., ♀:A, habitus, lateral view; B, dorsal tubercles scheme; C, dorsal scale-seta; D, cephalon, dorsal view; E, cephalon, posterior view; F, cephalon and pereonites 1-3, frontal view; G, pereonites 1 and 2 epimera, ventral view; H, pereonite 7, pleon, telson, and uropods, dorsal view; I, pereonite 7, pleonites 3-5, telson, and uropods, ventral view; J, antennula; K, antenna.

Figure 15. Ctenorillo papagayoensis Carpio-Díaz, Borja-Arrieta & Campos-Filho n. sp., ♀: A, left mandible; B, right mandible; C, maxillula; D, maxilla; E, maxilliped; F, uropod.

Figure 16. Ctenorillo papagayoensis Carpio-Díaz, Borja-Arrieta & Campos-Filho n. sp., ♂:A, pereopod 1; B, pereopod 7; C, genital papilla; D, pleopod 1; E, pleopod 2; F, pleopod 3 exopod; G, pleopod 4 exopod; H, pleopod 5 exopod.