Parmulopsyllus iamarinoi, Borges & Farias & Mácola & Neves & Son, 2021

Borges, Camila, Farias, Amilcar, Mácola, Rosa, Neves, Elizabeth G. & Son, Rodrigo Johns-, 2021, A new Entomolepididae genus and a new species of Spongiopsyllus Johnsson, 2000 (Copepoda, Siphonostomatoida) and their association with Aplysina Nardo, 1834 (Porifera, Demospongiae) in Todos-os-Santos Bay, Bahia, Brazil, Zootaxa 4981 (2), pp. 301-316 : 303-307

Parmulopsyllus iamarinoi sp. nov.

( Figs 1–3 )

lsid:zoobank.org:act: 408AB588-31F7-4F95-A3A0-E58F1ABB140E

Material examined. Holotype female ( UFBA 3290 ) associated with Aplysina cauliformis at 3 m depth in Yacht Club Beach, Salvador, Bahia, Brazil, collected by C. Borges in 27 th September 2012.

Description of female.

Body shield flattened ( Fig. 1a ), with radiating bands along outer margin. Mean body length (excluding caudal setae) 1110 µm and mean body width 930 µm. Pedigerous somite 1 fused with cephalosome. Pedigerous somite 2 narrower than the others. Pedigerous 3 and 4 fused, forming posterior shield covering urosome almost entirely, except for distal portion of anal somite and caudal rami. Urosome ( Fig. 1b ) 3-segmented. Genital double-somite fused with fifth pedigerous somite, 257 × 150 µm; length: width ratio 1.7:1. Both postgenital somites wider than long, 62 × 85, 65 × 80 µm, respectively. Caudal rami elongated, 27 µm long, armed with 6 plumose setae distally.

Antennule ( Fig. 1c ) slender, 325 µm long (not including setae), and 16-segmented. Length of segments in proximal to distal order: 111, 14, 9, 48, 15, 16, 5, 16, 18, 21, 23, 22, 25, 26, 28, and 29 µm, respectively. Segmental homologies and setation as follows: 1(I)–1; 2(II)–2; 3(III)–1; 4(IV-VII)–7; 5(VIII)–2; 6(IX–XII)–5; 7(XIII)–1; 8(XIV)– I+1; 9(XV)–2; 10(XVI)–2; 11(XVII)–1; 12(XVIII)–1; 13(XIX)–2; 14(XX)–1; 15(XXI)– 1+ae; 16(XXII– XXVIII)–9. Aesthetasc 94 µm long. Segment 8 bearing spine and seta. Antenna ( Fig. 1d ) 348 µm long (including distal claw); unarmed coxa with 53 µm long, basis 108 µm long. Exopod 1-segmented, 37 µm long armed with two very short, distal setae. Endopod 3-segmented; first segment unarmed, 91 µm long, ornamented with setules along outer margin, second segment 23 µm long and unarmed, third segment 24 µm long and armed with plumose, robust seta and terminal claw slightly curved with 36 µm long.

Oral cone ( Fig. 2a ) 264 µm long, reaching genital double somite, distal margin ( Fig. 2b ) ornamented with a dense bunch of setules on spatula-like tip. Mandible ( Fig. 2c ) comprising stylet and slender 1-segmented palp measuring 127 µm long, with 2 distal unequal setae, one partially plumose. Stylet slender ( Fig. 2c ) with 350 µm, with middle portion narrowing abruptly. Maxillule ( Fig. 2d ) bilobed. Inner lobe 98 µm long, armed with four naked setae, one much shorter than others. Outer lobe 30 µm long, armed with four distal setae. Maxilla ( Fig. 2e ) with syncoxa measuring 214 µm long and claw 156 µm long, very curved distally. Maxilliped ( Fig. 2f ) 4-segmented, 419 µm long (excluding claw); syncoxa and basis 113 and 167 µm long respectively, both unarmed. Endopod 2-segmented; first segment 46 µm long and armed with two setae; second segment 31 µm long, ornamented with setules on inner margin and armed with seta close to distal claw. Claw ornamented with setules and bearing slight indentation near tip.

Legs 1 to 3 ( Figs. 3a–c ) biramous, with 3-segmented rami. Leg 4 absent.

NEW NEW Armature formula of legs 1 to 3 as follows, with missing seta indicated in parenthesis:

All exopodal segments of legs 1 to 3 ( Figs. 3a, b and c ) have spinules on outer margins.All endopodal segments of leg 1 have row of long setules on outer margin, similarly for first and third endopodal segments of leg 2. On leg 1, first exopodal segment with distal denticle and second endopodal segment showing four denticles. Leg 3 with first and second endopodal segments bearing four and three deticle, respectively. First endopodal segment of leg 2 showing row of spinules distally.

Free exopodal segment of P5 ( Fig. 1b ) elongated and curved, 207 µm long, reaching distal margin of genital double-somite, and armed with two distal setae and another one subdistally.

Male. Unknown.

Etymology. Species named in honor of Atila Iamarino, biologist, PhD in microbiology and scientific communicator for his notorious work informing, educating and raising awareness in combating misinformation about covid-19.

Figures

FIG. 1. Parmulopsyllus iamarinoi gen. et sp, nov., female (UFBA 3290). a) Body in dorsal view; b) urosome; c) antennule; d) antenna. Scale bars: a = 200 µm; b = 100 µm; c–d = 50 µm.

FIG. 2. Parmulopsyllus iamarinoi gen. et sp. nov., female (UFBA 3290). a) Oral cone; b) Tip of oral cone, c) Mandible; d) maxillule; e) maxilla; f) maxilliped. Scale bars: a–f = 50 µm.

FIG. 3. Parmulopsyllus iamarinoi gen. et sp. nov., female (UFBA 3290). a) P1; b) P2; c) P3. Scale bars: a–c = 50 µm.