Brasiloniscus maculatus (Lemos de Castro, 1973 )

Cardoso, Giovanna Monticelli, Campos-Filho, Ivanklin Soares & Araujo, Paula Beatriz, 2018, Taxonomic revision of Brasiloniscus (Oniscidea, Pudeoniscidae) with description of a new species, European Journal of Taxonomy 434, pp. 1-16: 3-6

publication ID

https://doi.org/10.5852/ejt.2018.434

persistent identifier

http://treatment.plazi.org/id/03DB9962-FFA7-FFE6-FE6F-16FDCFC4F7D0

treatment provided by

Plazi

scientific name

Brasiloniscus maculatus (Lemos de Castro, 1973 )
status

gen. et comb. nov.

Brasiloniscus maculatus (Lemos de Castro, 1973)  gen. et comb. nov.

Figs 1–2View Fig. 1View Fig. 2, 7AView Fig. 7

Brasiloniscus maculatus Lemos de Castro, 1973: 6  , figs 3–4.

Brasiloniscus maculatus  – Leistikow & Wägele 1999: 42. — Schmalfuss 2003: 57. — Schmidt & Leistikow 2004: 17.

Material examined

Paratypes

BRAZIL: 4 ♂♂, 3 ♀♀, state of São Paulo, Ilha da Vitória , 30 Mar. 1965, K. Lenko leg., on tree bark ( MNRJ 6212View Materials). 

Redescription

MEASUREMENTS. Maximum body length: 15 mm.

BODY. Habitus in lateral view as in Fig. 1AView Fig. 1. Material depigmented due to long preservation in ethanol 70% ( Fig. 7AView Fig. 7). Dorsum covered by fan-shaped scale-setae and polygonal pattern scales ( Fig. 1BView Fig. 1), schisma with overlapping scales ( Fig. 1CView Fig. 1), ribs slightly developed on median and paramedian areas of pereonites, more evident on pereonites 1–5; noduli laterales 1–7 short, inserted at same distance from lateral margins and in each pereonite progressively near to posterior margin.

CEPHALON ( Fig. 1D–EView Fig. 1). Lateral lobes slightly bent upwards, frontal shield with lateral sides almost straight; eyes consisting of 20–25 ommatidia.

PEREON. Pereonite 1 epimeron with inner lobe of schisma rounded. Pereonites 2 and 3 with ventral lobes rounded, more conspicuous on pereonite 2 ( Fig. 1FView Fig. 1).

PLEON ( Fig. 1G–HView Fig. 1). Neopleura 5 not reaching distal margin of uropod protopod; telson with shallow dorsal depression, lateral sides concave.

ANTENNULA ( Fig. 1IView Fig. 1). Distal article with subapical aesthetascs.

ANTENNA ( Fig. 1J–KView Fig. 1). Fifth article of peduncle twice as long as flagellum. Flagellum with second and third articles subequal in length.

MOUTH. Mandible with molar penicil with about eight branches, left mandible ( Fig. 1LView Fig. 1) with 2+2 penicils, right mandible ( Fig. 1MView Fig. 1) with 1+1 penicils. Maxillula ( Fig. 1NView Fig. 1) inner endite bearing two hairy penicils; outer endite of 4+6 teeth, five of them with cleft apex. Maxilla ( Fig. 1OView Fig. 1) bilobate, strong suture line, outer lobe wider than inner lobe, both covered with setae. Maxilliped ( Fig. 1PView Fig. 1) palp with two long

setae on proximal article; endite subrectangular, median seta strong, surpassing distal margin, distal portion bearing many small setae.

PEREOPODS ( Fig. 2A–C, JView Fig. 2). With sparse setae on sternal margin, pereopod 1 carpus with distal seta serrate at apex and longitudinal antennal grooming brush; dactylus with inner claw not surpassing outer claw, dactylar and ungual setae simple.

UROPOD ( Fig. 1G–HView Fig. 1). Endopod about twice as long as exopod.

PLEOPOD EXOPODS. Respiratory areas as in diagnosis, exopods 1–4 with well-developed respiratory areas, reduced on exopod 5.

Male

PEREOPOD 7 ( Fig. 2CView Fig. 2). Base with lobe on distal sternal margin.

PLEOPODS. Pleopod 1 ( Fig. 2D–EView Fig. 2) exopod with deep re-entrancy on distal margin, inner margin rounded, inner and distal margin bearing setae; endopod twice as long as exopod, distal portion directed outwards with small inner lobe and narrow apex. Pleopod 2 ( Fig. 2FView Fig. 2) exopod triangular bearing setae; endopod slender, longer than exopod, reaching pleopod 4. Pleopod 3–5 exopod ( Fig. 2G–IView Fig. 2) rhomboid bearing small setae on outer margin; exopod 5 with transverse fringe of thin setae.

Remarks

Lemos de Castro (1973) mentioned the absence of respiratory area on pleopod exopods. However, the examination of the type material revealed the presence of uncovered respiratory areas in all pleopod exopods. New illustrations are provided here along with characters that were not mentioned in the original description.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Isopoda

Family

Pudeoniscidae

Genus

Brasiloniscus

Loc

Brasiloniscus maculatus (Lemos de Castro, 1973 )

Cardoso, Giovanna Monticelli, Campos-Filho, Ivanklin Soares & Araujo, Paula Beatriz 2018

2018
Loc

Brasiloniscus maculatus Lemos de Castro, 1973 : 6

Castro, 1973 : 6

Loc

Brasiloniscus maculatus

Leistikow & Wägele 1999 : 42 Schmalfuss 2003 : 57 Schmidt & Leistikow 2004 : 17