Caecoserolis Wagele 1994
Creators: name: Bruce, Niel
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Serolidae
Caecoserolis

description: <i>Caecoserolis</i> Wägele, 1994 <i>Caecoserolis</i> Wägele, 1994: 10 (not <i>Caecoserolis</i> of Poore and Brandt 1997: 161; = <i>Myopiarolis</i> gen. n.) <b>Type species.</b> <i>Serolis brinki</i> Kensley, 1978; original designation (Wägele 1994). <b>Description.</b> <i>Head</i> lateral lobe mesial margin with single concavity; anterolateral lobes forming of continuous margin with pereonite 1; anterior submarginal ‘ridge’ absent; posterior margin without ornamentation. <i>Eyes</i> absent. <i>Pereonites</i> all entire, articulating; pereonite 1 anterior margin not strongly bent dorsally, dorsally without tubercles. <i>Coxae</i> of pereonites 2–4 articulated, with dorsal sutures; 2–4 and pereonite 6 entirely lacking coxal keys; distal margin truncate; coxae 6 wide, laterally or distally broad, extending proximal to insertion of uropod peduncle. <i>Ventral coxal plates</i> 2–4 meeting midline; simple, smooth; plates 6 and 7 entirely separate. <i>Pleonites</i> distally narrow or acute, laterally overlapped by coxae 6, extending posteriorly along pleotelson. <i>Sternites</i> 5–7 visible, fused. <i>Sternal</i> plates of pleonites 1–3 3-cornered, with acute median point, without median ridge. <i>Pleotelson</i> dorsal surface not vaulted, with weak median longitudinal carina, without paired sublateral carinae; pleotelson posterior margin evenly rounded, without distinct exit channel. <i>Antennule</i> flagellum 1.2–2.0 as long as peduncle articles 3 and 4, extending to pereonite 2. <i>Antenna</i> peduncle articles 4 and 5 broad, article 5 less than 5 times as long as greatest width; flagellum three-quarters as long as peduncle article 5. <i>Epistome</i> evenly rounded. <i>Mandible</i> incisor with two posterior cusps; left mandible lacinia mobilis three-quarters as wide as incisor or larger, right lacinia mobilis distally multicuspid; mandibular spine distally serrate. <i>Maxilliped</i> palp with 3 articles; article 3 cordiform, longer than wide. <i>Pereopod 1</i> carpus RS–state not known (pilose <i>vs</i> serrate); propodal palm setae all RS, alternating straight and flattened, wide RS finely pilose, narrow RS distally bifid, with simple flagellum. <i>Pereopod</i> 2 propodus inferior margin without heel; palm straight; unguis simple, blunt. <i>Penial</i> openings narrowly separated. <i>Pleopods</i> 1–3 peduncles subquadrate. slightly narrower distally, pleopods 1–3 peduncles with coupling setae. <i>Pleopod</i> 2 endopod lamellar part slightly shorter than ramus. <i>Uropods</i> Biramous, inserted on pleotelson mid-laterally, positioned laterally, not forming part of continuous body outline; less than one-third as long as pleotelson, endopod distally rounded. <b>Remarks.</b> <i>Caecoserolis</i> belongs with the group of genera characterised by having a distal stem on pleopod 2 endopod, approximating to the ‘Group B’ of Wägele (1994). The genus can be identified by the flat (or weakly domed) pleotelson that lacks lateral carinae, antenna with broad peduncular articles 4 and 5, pleopod peduncles that are sub-quadrate (slightly narrower distally than proximally) and by the short uropods inserted mid-laterally on the pleotelson; another less precise character is that <i>Caecoserolis</i> has a flatter body than related genera. All but the type species of <i>Caecoserolis</i> have been transferred to the <i>Myopiarolis</i> gen. n. Th e characters that most readily separate these two genera (in parentheses for <i>Myopiarolis</i>) include antenna peduncle articles 4 and 5 broad with article 5 less than 5 times as long as greatest width (slender, elongate, 4.6–6.3 and 8.6–10.3 as long as wide respectively), pleopods 1–3 peduncles quadrate or subquadrate (triangular), pereonite 1 anterior margin anterior margin weakly indented (distinctly indented), pereonites all with visible entire sutures (pereonites 5–7 sutures medially fused), simple and flat pleotelson that lacks sub-lateral carina (pleotelson vaulted, with sub-lateral carinae), coxae 6 not extending posteriorly to pleonites (extending posteriorly to pleonites) and penial openings narrowly separated (fused in all species of <i>Myopiarolis</i>). <b>Distribution.</b> The genus is monotypic, with one western Indian Ocean species, off the Natal coast of South Africa.
description: Published as part of <i>Bruce, Niel, 2009, New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific, pp. 17-76 in ZooKeys 18 (18)</i> on pages 70-71, DOI: 10.3897/zookeys.18.96, http://zenodo.org/record/576495
description: {"references": ["Wagele J-W (1994) Notes on Antarctic and South American Serolidae (Crustacea, Isopoda) with remarks on the phylogenetic biogeography and a description of new genera. Zoologische Jahrbucher der Systematik 121: 3 - 69.", "Poore GCB, Brandt A (1997) Crustacea Isopoda Serolidae: Acutiserolis cidaris and Caecoserolis novaecaledoniae, two new species from the Coral Sea. Resultats de Campagnes MU- SORSTOM, Volume 18. Memoires du Museum National d'Histoire Naturelle, Paris 176: 151 - 168.", "Kensley BF (1978) Th e South African Museum's Meiring Naude cruises. Part 7. Marine Isopoda. Annals of the South African Museum 74: 125 - 158."]}