TABLE 1 in Two new species of Prionospio (Annelida: Spionidae) from the Northwest and Northeast Atlantic

TABLE 1. Main taxonomic characters of the six species most similar to Prionospio dubia Day, 1961. Based on Wilson’s, (1990) redescription of South African specimens*. Chaetiger (ch.); notations indicate the relative length (2, 1/3, 1/5, or 2/3) of branchial pairs 1-4 to the notopodial lamellae (NL).
CharactersP. dubia Day, 1961 *P. coorilla Wilson, 1990P. anuncataP. jonatani Delgado-P. gayheadia sp. nov.P. multisetosa sp. nov.Fauchald, 1972Blas, 2015Measurement (mm):Anterior fragment:a. 10, 0.25–3a. 45, 2.5a. 16–23, 0.2–0.6a. 18–23, 0.3–0.5a. 11–37, 0.2–0.7a. Length, widtha. 7.5–11, 0.4–7b. 45–62b. 98b. 72–79b. 76–94b. 60–98b. No. of chaetigersb. 26–50ProstomiumTriangular, narrow,Triangular, anteriorlyAnteriorly truncateSkittle-shaped,Flask-shaped, anteriorlySkittle-shaped,anteriorly roundedroundedanteriorly narrow,narrow, truncate, wideninganteriorly roundedroundedin mid-regionEyesPresent only in largestPresentAbsentAbsentAbsentAbsentspecimens1st pair branchiae:a. 7a. 6a. 15–16a. 6a. 6a. 5a. Extending up tob. 4–5b. About 4–5b. 11b. 4–5b. 3–4b. 4–5chaetiger number(s)b. Times as long asnotopodial lamellae4th pair of branchiae:a. 2/3> NLa. 2> NLa. 2> NLa. 1/3> NLa. Slightly> NLa. Slightly>, = NLa. Lengthb. Many pinnulesb. Few pinnules,b. Many pinnulesb. Few pinnules,b. Few pinnules alongb. Many pinnules alongb. Pinnulesarranged on posteriordigitiform on posterioron posteriordigitiform along outerouter lateral marginouter lateral marginsurfacessurfacesurfacelateral marginRelative length of nakedShortVery longVery shortVery longVery longVery shortdistal tips of 1st and 4thpinnate branchial pairsRelative lengths of:a. 4 =,> 2,3a. 4> 2,3a. 4 <2,3a. 4> 2,3a. 4> 2, 3a. 4> 2, 3a. Pinnate pair 4 andb. 2, 3 =,> NLb. 2, 3 NLb. 2, 3>, NLapinnate pairs 2,3b. Apinnate pairs 2,3 andnotopodial lamellae (NL)Anterior notopodialVery lowVery lowVery lowBasally fused with theVery lowWell-developedprechaetal lamellaenotopodial postchaetalpostbranchial: chaetigerslamellae in the branchial13–33regionNotopodial lamellaeNoNoNoNoOn chaetigers 21–32On chaetigers 14–37extending slightly ontodorsumFauchald, 1972Blas, 2015Anterior neuropodiala.?a. Reduceda. Roundeda. Small, rounded, mucha. Very short, rounded,a. Large, tongue-shapedpostchaetal lamellaeb. Asymmetrical ovoidb. Asymmetrical ovoid,b. Triangularsmaller than 1/3 of themuch smaller than 1/5 ofwith rounded edge, slightlya. Chaetiger 1c. Asymmetrical ovoidwith small, ventrallyc. Triangularsize of the NLthe size of the NLsmaller than the NLb. Chaetiger 2d. Asymmetrical ovoiddirected processd. Triangularb. Squareb. Oval with a roundedb. Ovalc. Chaetiger 3e. Semi-circularc. Asymmetrical ovoide. Triangularc. Squareventral lobe and slightlyc. Subtriangular withd. Chaetiger 4d. Asymmetrical ovoidd. Squareelongated dorsal edgeblunt dorsal edge, to ovale. Chaetiger 5e. Asymmetrical ovoide. Squarec. Ovald. Ovald. Ovale. Roundede. RoundedAnterior notopodialGranular capillariesGranular capillariesDense fasciclesUnilimbate, heavilyCapillaries of ch. 1 short,Capillaries of ch. 1 smooth,chaetaearranged in 3 rowsarranged in 3 rowsgranulated and withmoderately granulated,alimbate, arranged in 1long capillary tips;and arranged in 1 row.row. Capillaries of ch. 2capillaries of ch. 1Capillaries of ch. 2 onwardsonwards heavily granulated,arranged in a tuft.with very long tips,unilimbate, arranged in 4Capillaries from ch. 2arranged in 3 rows: chaetaerows up to around ch. 13.onwards arranged in 3moderately granulated onrowsposterior rows, smooth onanterior row.Anterior neuropodialGranulated capillaries,Granulated capillaries,Dense fascicles,Capillaries allCh. 1 with short,Ch. 1 with smooth, alimbatechaetaearranged in 2 rowsarranged in 2 rowschaetalunilimbate, heavilymoderately granulatedcapillaries, arranged in 1arrangementgranulated and withcapillaries, arranged inrow; chs. 2–5 with smooth,unknownlong tips. Capillaries1 row. Capillaries of ch.unilimbate capillaries,of ch. 1 arranged in 12 onwards arranged in 2arranged in 2 rows; from ch.row. Capillaries of ch.rows, with moderately6 onwards with moderately2 onwards arranged ingranulated capillaries ongranulated, alimbate2 rowsposterior row, and smoothcapillaries, arranged in 2chaetae on anterior row.rowsSabre chaetaea. 17–20a. 12–14?a. 14–18.a. 15–18 (smallera. 19–24 (smaller specimen,a. From chaetigers...b. Stout, granulated,b. Granulated, alimbateb. Robust, long,specimens, 15–17)14)b. Description of chaetaeslightly unilimbatemoderately granulated,b. Heavily granulated,b. Heavily granulated,without sheathswith very narrow sheathsbasally radial and alimbateNeuropodial hooded hooksa. 18–19a. 15–18a. 27–32a. 16–28a. 19–22 (smallera. 19–22 (smaller specimen,a. From chaetigersb. 3–4b. 3–4b. 5–7b. 4specimens, 17–18)16)b. No. of teethb. 4b. 3Notopodial hooded hooksa. 46–50a. 42–50Absenta. 35–77a. 70–76 (smallera. 50–55 (smaller specimen,a. From chaetigersb.?b. 3–4b. 4specimens, 56-59)46)b. No. of teethc. 2 (Day, 1961)c. Up to 2c. Up to 4b. 4b. 3c. max. No.c. Up to 3c. Up to 3
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