Ischioscia herrerai Lopez-Orozco, Carpio-Diaz & Campos-Filho 2020, n. sp.
Creators: name: Campos-Filho, Ivanklin Soares
name: López-Orozco, Carlos Mario
name: Carpio-Díaz, Yesenia M.
name: Águiar, José Otávio
name: Navas, Gabriel R.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Philosciidae
Ischioscia
Ischioscia herrerai

description: Ischioscia herrerai López-Orozco, Carpio-Díaz & Campos-Filho n. sp.
(Figs 1-3)
urn:lsid:zoobank.org:act: 84046969-EDD0-4A8E-8175-7C645A1BB873
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; Y. Herrera-Medina leg.; CUDC-CRU 33.
Paratypes. Colombia • 1 ♂ (part in micropreparations); same locality and date as for holotype; C. M. López-Orozco leg.; CUDC-CRU 45 • 1 ♀ (part in micropreparations); same locality and date as for holotype; C. M. López-Orozco leg.; CUDC-CRU 47 • 2 ♂, 3 ♀; same locality and date as for holotype; C. M. López-Orozco leg.; ICN-CI-86 • 12 ♂, 37 ♀; same locality and date as for holotype; C. M. López-Orozco leg.; CUDC-CRU-37 • 1 ♂, 13 ♀; 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-36.
ETYMOLOGY. — The new species is named after Yeison Herrera- Medina who collected part of the specimens used in this study.
DESCRIPTION
Maximum body size: male 9 mm × 3.5 mm (holotype); female 9.8 mm × 3.8 mm. Body as in Fig. 1A. Colour dark brown: antennal peduncle with first and second articles slightly pigmented, third to fifth articles and flagellum strongly pigmented; cephalon with irregular unpigmented spots; pereon with longitudinal unpigmented areas on paramedian region, pereonites 4-7 with one longitudinal unpigmented spot on median portion, epimera with two distinct unpigmented spots near posterior portions; pleon, telson and uropod exopods strongly pigmented (Fig. 1A). Dorsal surface bearing short triangular scale-setae (Fig. 1B). Cephalon (Fig. 1C, D) lateral lobes and frontal line absent, supraantennal line almost straight; vertex dorsoventrally flattened with prominent compound eyes on lateral protrusions; eyes with 27 ommatidia arranged in four rows. Pleon (Fig. 1A) narrower than pereon, neopleurae 3-5 well developed and directed backwards. Telson (Fig. 1E) with lateral margins concave, apex rounded. Antennula (Fig. 1F) of three articles, distal article bearing six superimposed aesthetascs plus apical pair. Antenna (Fig. 1G) when extended posteriorly reaching anterior portion of pereonite 3; flagellum of three articles subequal in length, apical organ very long. Mandibles with molar penicil composed of seven branches, left mandible (Fig. 2A) with 2+1 penicils, right mandible (Fig. 2B) with 1+1 penicils. Maxillula (Fig. 2C) inner endite with distal margin rounded bearing two hairy penicils; outer endite of 4+5 teeth, two of them with cleft apex. Maxilla (Fig. 2D) outer lobe almost three times as wide as inner lobe, distal margin rounded and covered with thin setae, one thick seta on inner portion; inner lobe rounded bearing thick setae. Maxilliped (Fig. 2E) basis rectangular bearing sparse setae; palp with two setae on proximal article; endite sub-rectangular, rostral and caudal surfaces hairy, medial seta not surpassing distal margin. Uropod (Fig. 2F) protopod and exopod grooved on lateral margin, exopod as long as endopod, endopod inserted proximally. Pereopods 1-7 long and slender; carpus 1 with antennal grooming brush transverse and distal setae apically cleft; dactylus of two claws, inner claw not surpassing outer claw, ungual seta long, dactylar seta apically plumose. Pleopod exopods without respiratory areas.
Male
Pereopods 1-3 with carpus enlarged, rostral portion bearing dense field of setae. Pereopod 1 and 2 propodus and pereopods 1-3 merus bearing dense field of setae on rostral and sternal portions (Fig. 3A). Pereopod 7 (Fig. 3B) ischium with rounded lobe bearing one strong seta on caudal surface, and distal sternal portion prominent. Genital papilla (Fig. 3C) truncated apically, triangular ventral shield and two apical orifices. Pleopod 1 (Fig. 3D) exopod cordiform, inner margin slightly sinuous, outer margin with distinct lateral incision, apical lobe triangular, directed outwards; endopod stout, almost twice as long as exopod, distal portion straight with row of small setae on medial portion, apex rounded with subapical lobe on outer margin. Pleopod 2 (Fig. 3E) exopod triangular, outer margin concave bearing several setae; endopod stout, longer than exopod, apex pointed. Pleopods 3 and 4 as in Fig. 3F and G, respectively. Pleopod 5 (Fig. 3H) exopod triangular, transverse rows of scales, outer margin straight bearing five setae.
REMARKS
In the shape of the male pleopod 1 exopod Ischioscia herrerai López-Orozco, Carpio-Díaz & Campos-Filho n. sp. resembles I. martinae Leistikow, 1997 and I. muelleri Leistikow, 1997, but it differs in the shape of the male pereopod 1-2 carpus and the presence of a lobe on the male pereopod 7 ischium. In having a lobe on the male pereopod 7 ischium I. herrerai López-Orozco, Carpio-Díaz & Campos-Filho n. sp. is similar to I. variegata (Dollfus, 1893), I. panamaensis Leistikow, 1999, I. marmorata Leistikow, 2000, I. hirsuta Leistikow, 2001, I. colorata Leistikow, 2001, I. pariae Leistikow, 2001, I. guamae Leistikow, 2001, and I. trifasciata Leistikow, 2001; however, it differs from all these species in the colour pattern, shape of the male pereopods 1-3 carpus, of the lobe on the male pereopod 7 ischium, and of the male pleopod 1 exopod.
description: Published as part of 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, pp. 115-130 in Zoosystema 42 (8) on pages 116-120, DOI: 10.5252/zoosystema2020v42a8, http://zenodo.org/record/3726211