Ischioscia unicartagenae Campos-Filho,, 2020

Campos-Filho, Ivanklin Soares, López-Orozco, Carlos Mario, Carpio-Díaz, Yesenia M., Águiar, José Otávio & Navas, Gabriel R., 2020, Three new species of Ischioscia Verhoeff, 1928 (Isopoda, Oniscidea, Philosciidae) from Serranía de Perijá, Andean Cordillera, Colombian Caribbean, Zoosystema 42 (8), pp. 115-130 : 122-125

Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp.

( Figs 7-9 )

urn:lsid:zoobank.org:act:38E5D677-A988-4B85-AC82-F78325E4C9C8

TYPE MATERIAL. — Holotype. Colombia • ♂; Quebrada El Jordán, El Contento Village, San José de Oriente, La Paz, Cesar; 10°17’40.4”N, 72°55’52.1”W; 13.VIII.2015; C. M. López-Orozco leg.; CUDC-CRU 104 .

Paratypes. Colombia. 1 ♂ (parts in micropreparations); same locality and date as for holotype; Y. Herrera-Medina leg.; CUDC-CRU 105 • 1 ♀ (parts in micropreparations); same locality and date as holotype; Y. Herrera-Medina leg.; CUDC-CRU 106 • 1 ♂, 4 ♀; same locality and date as for holotype; C. M. López-Orozco leg.; ICN-CI-87 • 4♂, 6 ♀; same locality and date as for holotype; C. M. López-Orozco leg.; CUDC-CRU-34 • 4 ♀; Cerro Pintao, La Jagua del Pilar, La Guajira; 10°25’41.8”N, 72°56’8.3”W; 10.VIII.2015; C. M. López-Orozco leg.; CUDC-CRU-50 .

ETYMOLOGY. — The new species name honours the University of Cartagena (UDC), on the 193rd anniversary of its foundation, which has contributed to the academic and research training of professionals in different science fields.

DESCRIPTION

Maximum body size: male 6.9 mm × 3 mm (holotype); female 7 mm × 2.5 mm. Body as in Fig. 7A . Colour dark brown: antennae and uropods weakly pigmented; cephalon with irregular unpigmented spots; pereon with longitudinal unpigmented spots on paramedian region, median portion strongly pigmented, epimera pigmented; pleon and telson strongly pigmented, telson one unpigmented spot on median region ( Fig. 7A ). Dorsal surface bearing short triangular scale-setae ( Fig. 7B ). Cephalon ( Fig. 7C, D ) lateral lobes and frontal line absent, supraantennal line straight; vertex dorsoventrally flattened with prominent compound eyes on lateral protrusions; eyes with 27 ommatidia arranged in four rows. Pleon ( Fig. 7A ) narrower than pereon, neopleurae 3-5 well developed, directed backwards. Telson ( Fig. 7E ) with lateral margins concave, apex rounded. Antennula ( Fig. 7F ) of three articles, distal article bearing five lateral aesthetascs plus apical pair. Antenna ( Fig. 7G ) when extended posteriorly reaching posterior margin of pereonite 4; flagellum of three articles subequal in length, apical organ very long. Mandibles with molar penicil composed of 6 to 7 branches, left mandible ( Fig. 8A ) with 2+1 penicils, right mandible ( Fig. 8B ) with 1+1 penicils. Maxillula ( Fig. 8C ) inner endite with distal margin rounded, outer distal margin with tip and bearing two hairy penicils; outer endite with 5+5 teeth, three of them with cleft apex. Maxilla ( Fig. 8D ) outer lobe more than twice as wide as inner lobe, distal margin rounded covered with setae; inner lobe rounded bearing thick setae. Maxilliped ( Fig. 8E ) basis rectangular bearing sparse setae; palp with one seta on proximal article, outer distal margin with fringe of thin setae; endite sub-rectangular, ventral and dorsal surfaces hairy, medial seta surpassing distal margin, outer distal portion with one seta. Uropod ( Fig. 8F ) protopod and exopod grooved on lateral margin, exopod longer than endopod, endopod almost at same level of exopod. Pereopods 1-7 long and slender, sternal margin bearing sparse long setae; carpus 1 with transverse anten- nal grooming brush; dactylus of two claws, inner claw not surpassing outer claw, ungual seta longer than outer claw, dactylar seta apically plumose. Pleopod exopods without respiratory areas.

Male

Pereopod 1 ( Fig. 9A ) merus and carpus with dense field of setae. Pereopod 7 ( Fig. 9B ) without any morphological modifications. Genital papilla ( Fig. 9C ) truncated apically, triangular ventral shield and two apical orifices. Pleopod 1 ( Fig. 9D ) exopod cordiform, distal margin rounded, outer margin with lateral incision, lateral process short and rounded; endopod stout, distal portion straight, apex rounded and arched bearing row of small setae on medial margin, outer distal margin bearing subapical small lobe. Pleopod 2 ( Fig. 9E ) exopod triangular, outer margin concave bearing several setae; endopod stout, slightly longer than exopod. Pleopods 3 and 4 as in Fig. 9F and G , respectively. Pleopod 5 ( Fig. 9H ) exopod triangular, outer margin almost straight bearing three setae, median portion with transverse rows of thin setae.

REMARKS

In the shape of the male pleopod 1 endopod Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp. is similar to I. martinae Leistikow, 1997 and I. elongata Leistikow, 1997 , but it is readily distinguishable in the shape of the male pleopod 1 exopod. In the shape of the male pleopod 1 exopod I. unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp. resembles I. curvaculeus Leistikow, 2001 , but it differs in the cephalon without lamina frontalis, broader distal portion of telson, male pereopod 7 merus without proximal lobe, and male pleopod 1 endopod stout. Moreover, I. unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp. differs from I. herrerai López-Orozco, Carpio-Díaz & Campos-Filho n. sp. and I. perijaensis Carpio-Díaz, López-Orozco & Campos-Filho n. sp. in the shape of the male pleopod 1 exopod.

Figures

FIG. 7. — Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp., female paratype (CUDC-CRU 106). A, habitus, dorsal view; B, dorsal scale-seta; C, cephalon, dorsal view; D, cephalon, frontal view; E, telson; F, antennula; G, antenna. Scale bar: 1 mm.

FIG. 8. — Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp., female paratype (CUDC-CRU 106). A, left mandible; B, right mandible; C, maxillula inner endite (right), outer endite (left); D, maxilla; E, maxilliped; F, uropod.

FIG. 9. — Ischioscia unicartagenae Campos-Filho, Carpio-Díaz & López-Orozco n. sp., male paratype (CUDC-CRU 105). A, pereopod 1; B, pereopod 7; C, genital papilla; D, pleopod 1, exopod (left), endopod (right); E, pleopod 2; F, pleopod 3; G, pleopod 4; H, pleopod 5.