Armandia circumpapillata

Magalhães, Wagner F., Rizzo, Alexandra E. & Bailey-Brock, Julie H., 2019, Opheliidae (Annelida: Polychaeta) from the western Pacific islands, including five new species, Zootaxa 4555 (2), pp. 209-235: 215-218

publication ID

https://doi.org/10.11646/zootaxa.4555.2.3

publication LSID

lsid:zoobank.org:pub:A7CF86E1-C763-4082-B1C2-9B8B66428142

persistent identifier

http://treatment.plazi.org/id/03E5E958-FFD1-916D-62CF-FB7BFF37FE8E

treatment provided by

Plazi

scientific name

Armandia circumpapillata
status

sp. nov.

Armandia circumpapillata  sp. nov.

Figures 1View FIGURE 1 (D), 5 (A–C) and 6 (A–E)

Material examined. Holotype: Hawaii, Oahu, Waianae ocean outfall, Sta. W 2R2, 21°24'46.5" N, 158°11'45.6" W, May /2015, 27.7 m ( BPBM-R3883)GoogleMaps  ; Paratypes: same station, date and collector as holotype (2 spms, BPBM- R3884). Additional material: Oahu , Hawaii : Waianae ocean outfall, Sta. W 2R2, 21°24'46.5" N, 158°11'45.6" W, May /2015, 27.7 m (2 spms on SEM stub); Waianae ocean outfall, Jun/2014, Sta. W 2R3, 21°24'46.5" N, 158°11'45.6" W, 27 m (3 spms); May/2015, Sta. W 9R6, 21°26'29.4" N, 158°12'16.3" W, 33 m (4); Sta. ZWR5, 21°25'25" N, 158°11'55.4" W, 34 m (1). Barbers Point ocean outfall, Sept/2014, Sta. HB 2R5, 21°17'00.4" N, 158°01'21.5" W, 59.4 m (3); Sta. HB 2R3, 21°17'00.4" N, 158°01'21.4" W, 59.4 m (4). Mokapu ocean outfall, Oct/ 2013, Sta. DR 2, 21°25'32.3" N, 157°42'53.6" W, 60 m (7). Sand Island ocean outfall, Oct/2014, Sta. D 3AR1, 21°16'55.4" N, 157°53'49.2" W, 50 m (5); Sand Island ocean outfall, Oct/2015, Sta. D 2R1, 21°16'56.8" N, 157°54'35.6" W, 53.3 m (7); Sta. E 3R2, 21°16'44.0" N, 157°53'48.9" W, 82.3 m (1); Sta. D 3AR2, 21°16'55.5" N, 157°53'49.3" W, 50.9 m (4); about 1 km offshore Waikiki, Sta. SE, Feb /2016, coll. M. HixonGoogleMaps  (5).

Diagnosis. Parapodia biramous, with parapodial prechaetal lobe and ventral lobe, lacking dorsal cirrus. Anal tube short, slightly narrower distally, with up to six transversal striations; up to seven pairs of round, short marginal papillae with gradation of length; internal, unpaired ventral anal cirrus, long and crenulated; one pair of glandular, digitate and wide basal papillae.

Description. Holotype 6 mm long and 0.5 mm wide for 27 chaetigers. Paratypes 5.5–7.4 mm long and 0.4–0.7 mm wide for 26–27 chaetigers. Body slender, slightly tapering towards anterior and posterior ends ( Fig. 6AView FIGURE 6). Prostomium elongate, excluding palpode, longer than wide; palpode elongate, clavate ( Figs 5AView FIGURE 5; 6BView FIGURE 6). A pair of small brownish eyes deeply and ventrally embedded in prostomium present; dorsal eye also small. One pair of oval-shaped nuchal organs on deep ciliated pits, posterior to eyespots inserted on posterior margin of prostomium ( Figs 5AView FIGURE 5; 6B, CView FIGURE 6); pharynx not observed. Branchiae from chaetiger 2 and absent only on last two chaetigers, short, not meeting middorsally, decreasing in length towards posterior chaetigers, last 2–3 chaetigers lacking branchiae ( Figs 5BView FIGURE 5; 6AView FIGURE 6); branchiae lacking pigmentation.

Parapodia biramous, with parapodial prechaetal lobe, triangular anteriorly and becoming rounded on mid- to posterior body ( Figs 5View FIGURE 5 A–C; 6D); ventral lobe present, shorter than prechaetal lobe and digitate, similar throughout ( Fig. 6DView FIGURE 6); dorsal cirrus absent. Simple capillary chaetae in two bundles; notochaetae twice longer than neurochaetae; notochaetae longer than branchiae throughout and neurochaetae of same length as branchiae from chaetiger 2. Notochaetae and neurochaetae of anterior chaetigers numbering eight capillaries per bundle reducing to 3–5 posteriorly. Lateral eyespots anterior to parapodia 7 on 11 chaetigers (chaetigers 7–17), reddish brown, variable shape, usually bean-shaped to horizontally oval ( Fig. 5AView FIGURE 5); eyespots of chaetiger 7, 16, and 17 of about a third the size of others.

Anal tube short, slightly narrower distally, as long as last two chaetigers and with up to six transversal striations ( Figs 5B, CView FIGURE 5; 6EView FIGURE 6). Posterior border provided with up to seven pairs of round, short papillae (but usually five pairs); marginal papillae with dorsal gradation in length, dorsal-most shorter, ventral-most papillae longer and slightly smaller than paired basal papillae ( Figs 5B, CView FIGURE 5; 6EView FIGURE 6). Internal, unpaired ventral anal cirrus, long and crenulated ( Figs 5B, CView FIGURE 5; 6EView FIGURE 6). Pair of glandular, digitate and wide basal papillae, usually larger and distinct from marginal papillae ( Fig. 5B, CView FIGURE 5); some individuals presenting dark spots on basal cirri ( Fig. 5BView FIGURE 5).

Remarks. Armandia circumpapillata  sp. nov. is most similar to specimens identified as Armandia intermedia sensu Day (1967)  from South Africa in relation to the shape of the anal cone and marginal papillae. Differences are related to the number of segmental eyes (11 pairs in A. circumpapillata  sp. nov. and 12 pairs in A. intermedia sensu Day, 1967  ), 5–7 pairs of marginal anal papillae in A. circumpapillata  sp. nov. and 10–20 papillae in A. intermedia sensu Day, 1967  , crenulated unpaired anal cirrus in A. circumpapillata  sp. nov. and unpaired anal cirrus being illustrated as smooth in A. intermedia sensu Day, 1967  .

Armandia opisthoculata Moreira & Parapar, 2017  shares some similarities with A. circumpapillata  sp. nov. in relation to the shape of the anal tube but differs in respect to the shape and number of paired marginal papillae (up to seven pairs in A. circumpapillata  sp. nov. and nine pairs in A. opisthoculata  ), length of the unpaired anal cirrus (long in A. circumpapillata  sp. nov. and short in A. opisthoculata  ). Small reddish spots were described for the paired basal papillae of A. opisthoculata  and pigmented spots were also described for the same body region in Armandia sampadae Gopal, Jaleel, Parameswaran & Vijayan, 2016  and to some specimens of A. circumpapillata  sp. nov.

Etymology. The epithet circum comes from the Latin for round, and papillata for papillae, referring to the round shape of the anal lateral and basal papillae.

Distribution. The type locality is Waianae, west shore of Oahu, Hawaii. This species has also been collected in Mamala Bay, Kailua Bay, Barbers Point and off Waikiki from shallow subtidal to 82 m depth in sand and coral rubble.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Opheliida

Family

Opheliidae

Genus

Armandia

Loc

Armandia circumpapillata

Magalhães, Wagner F., Rizzo, Alexandra E. & Bailey-Brock, Julie H. 2019

2019
Loc

A. circumpapillata

Magalhães & Rizzo & Bailey-Brock 2019

2019
Loc

A. circumpapillata

Magalhães & Rizzo & Bailey-Brock 2019

2019
Loc

A. circumpapillata

Magalhães & Rizzo & Bailey-Brock 2019

2019
Loc

A. circumpapillata

Magalhães & Rizzo & Bailey-Brock 2019

2019
Loc

Armandia opisthoculata

Moreira & Parapar 2017

2017
Loc

A. opisthoculata

Moreira & Parapar 2017

2017
Loc

A. opisthoculata

Moreira & Parapar 2017

2017
Loc

A. opisthoculata

Moreira & Parapar 2017

2017
Loc

Armandia sampadae

Gopal, Jaleel, Parameswaran & Vijayan 2016

2016