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, 7A View Figure

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. 1A View Figure . Material depigmented due to long preservation in ethanol 70% ( Fig. 7A View Figure ). Dorsum covered by fan-shaped scale-setae and polygonal pattern scales ( Fig. 1B View Figure ), schisma with overlapping scales ( Fig. 1C View Figure ), 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–E View Figure ). 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. 1F View Figure ).

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

ANTENNULA ( Fig. 1I View Figure ). Distal article with subapical aesthetascs.

ANTENNA ( Fig. 1J–K View Figure ). 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. 1L View Figure ) with 2+2 penicils, right mandible ( Fig. 1M View Figure ) with 1+1 penicils. Maxillula ( Fig. 1N View Figure ) inner endite bearing two hairy penicils; outer endite of 4+6 teeth, five of them with cleft apex. Maxilla ( Fig. 1O View Figure ) bilobate, strong suture line, outer lobe wider than inner lobe, both covered with setae. Maxilliped ( Fig. 1P View Figure ) 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, J View Figure ). 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–H View Figure ). 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. 2C View Figure ). Base with lobe on distal sternal margin.

PLEOPODS. Pleopod 1 ( Fig. 2D–E View Figure ) 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. 2F View Figure ) exopod triangular bearing setae; endopod slender, longer than exopod, reaching pleopod 4. Pleopod 3–5 exopod ( Fig. 2G–I View Figure ) 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

: 6

Loc

Brasiloniscus maculatus

: 42 : 57 : 17