Androdeloscia micropunctata, Grangeiro & Souza & Christoffersen, 2021

Grangeiro, Daniela Correia, Souza, Leila Aparecida & Christoffersen, Martin Lindsey, 2021, Three new species of Androdeloscia Leistikow, 1999 (Oniscidea: Philosciidae) from the Brazilian Amazonia, Zootaxa 5047 (3), pp. 321-341 : 333-338

Androdeloscia micropunctata sp. nov.

( Figs 9–12 , 13C )

Material examined. Holotype: Male ( INPA 2544 ), Brazil, Amazonas , Manaus, Januari lake: mixed water, 3º20’S, 60º17’W, Jun 15, 1988, J. Adis et al. col . Paratypes: 6 males, 6 females ( INPA 2545 ), same data as for holotype ; 2 females ( CRUST. UFPB 7405 ), same data as for holotype ; 3 males, 3 females ( LABISO-UECE 0088 ), same data as for holotype ; 2 males, 4 females ( MZUSP 41609 ), same data as for holotype ; 1 male ( INPA 2546 ), same locality as for holotype , Jun 30, 1988, J. Adis et al. col.; 3 males ( INPA 2547 ), same locality as for holotype , May 16, 1988, J. Adis et al. col.; 1 male ( LABISO-UECE 0089 ), Brazil, Amazonas , Manaus , Reserva Florestal A. Ducke: solid ground, 2º55’S, 59º59’W, Nov 6-11, 1998, J. Adis et al. col .; 1 male ( INPA 2548 ), Brazil, Amazonas , Manaus , Reserva Florestal A. Ducke: solid ground, 2º55’S, 59º59’W, Nov 6, 1983, S. Golovatch leg ; 1 male ( LABISO- UECE 0090 ), Brazil, Amazonas , Manaus, Tarumã Mirim river: secondary forest, 3º02’S, 60º17’W, Oct 26, 1982, J. Adis et al. col .; 2 males ( CRUST. UFPB 7406 ), Brazil, Amazonas , Manaus , Reserva Florestal A. Ducke: solid ground, 2º55’S, 59º59’W, May 16, 1988, J. Adis et al. col .; 2 males ( LABISO-UECE 0091 ), Brazil, Amazonas , Manaus, Tarumã Mirim river: secondary forest, 3º02’S, 60º17’W, Jan 30, 1983, J. Adis et al. col .; 1 male ( MZUSP 41610 ), Brazil, Amazonas , Manaus , Reserva Florestal A. Ducke: solid ground, 2º55’S, 59º59’W, Jun 9, 1983, J. Adis et al. col .

Etymology. The species name is reference to tiny tip on outer corner of truncate apex of male pleopod I endopod.

Diagnosis. Eyes with nine dark brown ommatidia. First antenna distal article with two apical aesthetascs, separated by wide gap from group of seven subapical aesthetascs. First maxilla outer endite with 5 simple teeth (two of them smaller) + 5 teeth (4 bifid, 1 simple, smaller), lateral margin fringed with setae; concavity absent. Left mandible with 5 penicils and right mandible with 6 penicils on molar process. Male pleopod I endopod distal portion simple, truncated, with row of minute setae in distal margin and tiny tip in outer corner, exopod inner margin slightly convex, rounded portion expanded laterally. Male pleopod V exopod without elongate tip.

Description. Largest male ( Fig. 9B ), 3 mm in length, 1 mm in width; largest non-ovigerous female, 3 mm long, 1 mm wide. Habitus narrow, pigmented dark brown ( Fig. 13C ). Cephalothorax not involved by pereonite 1; frontal and lateral lobes slightly developed; linea frontalis absent; linea supraantennalis bent downwards in middle ( Fig. 9A ); eyes with nine dark brown ommatidia. Pereon with noduli laterales flagelliforms, peak of coordinates b/c and d/c on coxal plates 1 and 4, respectively ( Fig. 9E ). Pereonite 1 with anterior margin nearly straight; pereonite coxal plates 6 – 7 with conspicuous tips. Pleon narrower than pereon ( Figs 9B , 13C ). Pleon epimera 3–5 with very small tips ( Figs 9B , 13C ). Pleotelson triangular with slightly rounded apex and lateral margins slightly convex ( Figs 9B , 13C ).

First antenna three-jointed ( Fig. 9C ), distal article with two apical aesthetascs separated by wide gap from a group of seven subapical aesthetascs.

Second antenna ( Fig. 9D ) with flagellum of three articles, distal article longest, proximal and median articles subequal in length; apical organ subequal in length to third article of flagellum; aesthetascs not seen in flagellum.

Mandibles hairy lobe with many setae and two penicils on left mandible ( Fig. 10A ) and one penicil on right mandible ( Fig. 10B ). One penicil between molar and incisive processes in both mandibles. Molar process with fivebranched penicils on left mandible ( Fig. 10A ) and six-branched penicils on right mandible ( Fig. 10B ).

First maxilla inner endite ( Fig. 10D ) with two penicils, small spine-like seta on laterodistal corner; outer endite ( Fig. 10C ) with 5 simple teeth (two smaller) + 5 teeth (4 bifid and 1 smaller and simple).

Second maxilla ( Fig. 10E ) inner and outer lobes hairy; inner lobe detached from outer lobe, with seven thick setae; outer lobe without tick setae.

Maxilliped ( Fig. 10F ) basis with some conspicuous setae and sulcus lateralis; palp with one large seta on proximal article and medial article with simple setae; endite subrectangular, setose, with one seta in distal portion and without penicil.

Pereopods with strong and slender spine-like setae; dactylar seta simple; inner claw very short. Pereopod I ( Fig. 12A, C ) merus with one trifid seta; carpus with antennal brush, ornamental sensory spine serrate, and three trifid setae.

Pleopod exopod respiratory areas not discernible. Pleopod V exopod ( Fig. 11E, G ) triangular, bearing conspicuous transversal field of setae and hairy groove along medial margin.

Uropod exopods slightly longer than endopods, endopods inserted proximally.

Male. No apparent sexual dimorphism on pereopod I and VII ( Fig. 11A–D ) except for small differences in size, number and topology of spine-like setae. Pleopod I endopod ( Fig. 11B ) with simple distal portion, without “hyaline lamellae”; apex truncate, bearing groups of little thin setae and small acute tip in outer corner; exopod ( Fig. 11A ) inner margin convex (slightly concave in female; Fig. 11G ); rounded portion expanded laterally (shortened in female; Fig. 11G ). Pleopod II endopod ( Fig. 11C ) non-flagelliform, tapering towards apex; exopod ( Fig. 11D ) subtriangular, as long as wide, one bifurcate seta on outer margin, distally, and some conspicuous setae along inner margin. Pleopod V exopod ( Fig. 11E ) without elongate tip, two setae on outer margin, one simple, one bifurcate.

Remarks. Androdeloscia micropunctata sp. nov. differs from all other species of genus by distinct morphology of simple distal portion of male pleopod I endopod bearing thin setae and small acute tip in outer corner; number of ommatidia (nine); number of subapical aesthetascs on first antenna (seven); and number of teeth of first maxilla (5+5).

Figures

FIGURE 9. Androdeloscia micropunctata sp. nov. A−B, male holotype. A, cephalothorax frontal; B, habitus dorsal; C−E, paratype male. C, first antenna; D, second antenna; E, ratio b/c and d/c of noduli laterales relative of pereonites I–VII. Scale bar: A–B = 1 mm; C–D = 0.3 mm.

FIGURE 10. Androdeloscia micropunctata sp. nov. A−F, male paratype. A, left mandible; B, right mandible; C, first maxilla, outer endite; D, first maxilla, inner endite; E, second maxilla; F, maxilliped. Scale bar = 0.1 mm.

FIGURE 11. Androdeloscia micropunctata sp. nov. A−G, male paratype. A. exopod of pleopod I; B, endopod of pleopod I; C, endopod of pleopod II; D, exopod of pleopod II; E, exopod of pleopod V; female: F, exopod of pleopod I; G, exopod of pleopod V. Scale bar = 0.1 mm.

FIGURE 12. Androdeloscia micropunctata sp. nov. A−D, male paratype.A, pereopod I; B, pereopod VII; female. C, pereopod I; D, pereopod VII. Scale bar = 0.2 mm.

FIGURE 13. A–C, A, Androdeloscia bicornuata sp. nov.; B, Androdeloscia paraleilae sp. nov.; C, Androdeloscia micropunctata sp. nov. Scale bar = 1 mm.