Julmarichardia gutui Ritger & Heard, 2007

Moralés-Núñez, Andres G. & Heard, Richard W., 2021, Julmarichardiidae, a new apseudoidean family (Crustacea: Tanaidacea: Apseudomorpha) with the description of a new species of Julmarichardia Guţu 1995 from the Northwest Australian Shelf, Zootaxa 5081 (1), pp. 77-115 : 105-110

Julmarichardia gutui Ritger & Heard, 2007

( Figs 20F, 20L, 20N , 21–24 )

We have reexamined type material and topotypical material of J. gutui , made corrections and additions to the morphology of its chelipeds and pereopods 1, 2 and 3 and observations on the species size distribution and interspecific variation, which are presented below.

Diagnosis. See Ritger & Heard (2007).

Amended diagnosis. Presence of mucus packets on several parts of body.

Material examined. — Paratypes: two ♂♂, two ♀♀ ( GCRL 2069 ).— Other topotypical material. — one SA , one non-ovigerous ♀ (with oostegites) and three ♂♂, ( AM P.52194), Stn 02-B12-S, (19°03’30’’S; 119°03’06’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 28-Apr-1983 . — two non-ovigerous ♀ (with oostegites) and one ♂, ( AM P.52211), Stn 06-B12-S, (19°03’00’’S; 119°02’23’’E), depth 80 m, Coll: FRV “ Soela ”, CSIRO 12-Dec-1982 . — one non-ovigerous ♀ (with oostegites), ( AM P.105701), Stn 04-B16-S, (20°01’12’’S; 116°57’36’’E), depth 52 m, Coll: FRV “ Soela ”, CSIRO 04-Sep-1983 . — three SA, seven non-ovigerous ♀♀ (with oostegites) (two broken), one ♀ empty marsupium, and three ♂♂, ( AM P.52331), Stn 05-B12-S, (19°03’24’’S; 118°03’42’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 23-Oct-1983 . — five SA, six non-ovigerous ♀♀ (with oostegites) (one damaged), two ♀♀ with empty marsupium (one broken), and three ♂♂ (one damaged), ( AM P.52335), Stn 05-B10-S, (19°04’54’’S; 118°52’12’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 23-Oct-1983 . — two SA, three non-ovigerous ♀♀ (with oostegites), one ovigerous ♀, one ♀ empty marsupium, four ♂♂, and three undetermined, ( AM P.52336), Stn 05-B11- S, (19°04’06’’S; 119°00’48’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 23-Oct-1983 . — two SA, two non-ovigerous ♀♀ (with oostegites), and one ovigerous ♀, ( AM P.52341), Stn 01-B2-S, (19°08’24’’S; 119°02’24’’E), depth 78 m, Coll: FRV “ Soela ”, CSIRO 11-Dec-1982 . — four SA, two non-ovigerous ♀ (with oostegites), one ovigerous ♀, and three ♂♂ (one damaged), ( AM P.105702), Stn 02-B6-S, (19°04’18’’S; 118°47’48’’E), depth 83 m, Coll: FRV “ Soela ”, CSIRO 27-Apr-1983 . — one SA, three non-ovigerous ♀♀ (with oostegites), two ovigerous ♀♀, eight ♂♂, and two undetermined, ( AM P.52354), Stn 01-B6-S, (19°04’24’’S; 118°47’30’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 16-Feb-1983 . — ovigerous ♀, ( AM P.52357), Stn 04-B4-S, (19°05’18’’S; 118°54’06’’E), depth 84 m, Coll: FRV “ Soela ”, CSIRO 29-Aug-1983 . — three SA, 11 non-ovigerous ♀♀, 31 non-ovigerous ♀♀ (with oostegites) (two damaged), six ovigerous ♀♀ (one broken), seven ♀♀ with empty marsupium (two damaged), 42 ♂♂ (three damaged), and six undetermined (one broken), ( AM P.52364), Stn 04-B12-S, (19°03’24’’S; 119°03’18’’E), depth 81 m, Coll: FRV “ Soela ”, CSIRO 01-Sep-1983 . — one SA and two non-ovigerous ♀, and one ovigerous ♀ (with oostegites), ( AM P.52368), Stn 03-B12-S, (19°03’00’’S; 119°04’06’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 30-Jun-1983 . — seven non-ovigerous ♀♀ (with oostegites), three ovigerous ♀♀, one ♀ with empty marsupium, five ♂♂, and three undetermined (damaged), ( AM P.52370), Stn 04-B10-S, (19°05’00’’S; 118°57’54’’E), depth 86 m, Coll: FRV “ Soela ”, CSIRO 29-Aug-1983 . — four non-ovigerous ♀♀ (with oostegites), two ovigerous ♀♀, one ♀ with empty marsupium, six ♂♂, ( AM P.52372), Stn 01-B4-S, (19°05’18’’S; 118°54’00’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 15-Feb-1983 . — 11 SA (on with right chela smaller and two with left chela smaller), One ♀ with oostegites (partially dissected), TBL 4.9 mm, XXXX, 11 non-ovigerous ♀♀ (with oostegites), two ovigerous ♀♀, and nine ♂♂, ( AM P.52376), Stn 05-B4-S, (19°05’24’’S; 118°53’54’’E), depth 80 m, Coll: FRV “ Soela ”, CSIRO 30-Oct-1983 . — two non-ovigerous ♀♀ (with oostegites), two ovigerous ♀♀, one ♀ with empty marsupium, one ♀ with remnants of marsupium, six ♂♂, ( AM P.52380), Stn 04-B6-S, (19°04’30’’S; 118°47’30’’E), depth 84 m, Coll: FRV “ Soela ”, CSIRO 28-Aug-1983 . — eight SA, 13 non-ovigerous ♀♀ (with oostegites), four ovigerous ♀♀ (one damaged), five ♀♀ with empty marsupium (one broken), 14 ♂♂ (one broken), and one undetermined, ( AM P.52388), Stn 05-B6-S, (19°04’05’’S; 118°47’47’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 30-Oct-1983 . — 13 SA, nine non-ovigerous ♀♀ (with oostegites), one ovigerous ♀, 11 ♂♂, and two undetermined (broken), ( AM P.105703), Stn 01-B10-S, (19°05’12’’S; 118°57’36’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 14-Feb-1983 . — one non-ovigerous ♀, one ♀ with empty marsupium, one ♂, and one undetermined (broken), ( AM P.56742), Stn 01- B5-S, (19°04’48’’S; 118°50’48’’E), depth 82 m, Coll: FRV “ Soela ”, CSIRO 15-Feb-1983 . — two SA, three nonovigerous ♀♀ (one broken), and one ovigerous ♀, ( AM P.56743), Stn 01-B12-S, (19°03’30’’S; 119°03’30’’E), depth 84 m, Coll: FRV “ Soela ”, CSIRO 14-Feb-1983 .

Redescription (partial). Cheliped ( Figs 21A–C , 24A ). Exopod with three articles, third article bearing four plumose setae (not illustrated). Mucus packets in carpus ( Fig. 24A ). Basis about 1.3 times longer than wide; ventral margin with three sub-proximal plumose setae, one spiniform seta on mid-margin, and six sub-distal plumose setae; inner face with mid-dorsal margin crenulate, with three mid-medial and three mid-dorsal simple setae ( Fig. 21B ). Merus triangular; ventral margin with small sub-proximal simple seta, mid plumose seta, and three simple setae and three translucent acute or subacute apophyses on sub-distal margin; mid-outer margin with eight plumose setae; inner face with three bipinnate spiniform setae ( Fig. 21B ). Carpus about twice longer than wide, larger than basis, widest distally; ventral margin with eleven plumose setae and five translucent acute or subacute apophysis; outer margin with a row of four sub-proximal plumose setae; dorsal margin with ten plumose setae, four mid setae ( Fig. 21B–C ), and sub-distal translucent acute or subacute apophyses; inner face with sub-distal margin having a row of 11 bipinnate setae ( Fig. 21B ). Propodus about 1.1 times longer than wide; ventral margin with two simple setae; outer margin with six spiniform setae (two ventral and four medial) ( Fig. 21B ), and two simple setae near articulation of movable finger; dorsal margin with two simple distally of unequal lengths; inner face with simple seta on outer ventral margin; with spiniform seta on mid-medial margin near articulation of movable finger, and “comb row” of nine (i.e., one biserrate and eight bipinnate) setae, and dorsal margin with sub-proximal simple seta ( Fig. 21B ); fixed finger with two ventral setae; with three spiniform seta and six sub-marginal simple setae on outer incisive margin, with tooth, with weakly crenulate dorsal margin after tooth, with two proximal simple setae of unequal lengths, claw short; inner face with sub-distal, ventro-lateral spiniform seta, incisive inner margin with two proximal simple setae, after tooth with row of seven small spines ( Fig. 21B ). Dactylus longer than fixed finger, with row of six spines ventrally ( Fig. 21A ); inner face with three pinnate spiniform setae on sub-distal margin ( Fig. 21B ).

Pereopod-1 ( Figs 22 , 24B ). Fossorial, strongly developed, with mucus packets in basis, merus, carpus, and propodus ( Fig. 24B ). Coxa, excluding anterior process, sub-quadrate; ventral margin with two setulate setae, simple seta, and small denticles adjacent to base of coxal process; inner face with row of 14 simple setae ( Fig. 22D ); coxal process well-developed, having length about twice width, becoming distally rounded, terminating in rounded tip ( Fig. 22A ); ventral margin asetose ( Fig. 22A ); dorsal margin with eight translucent acute or subacute apophysis and seven setulate setae ( Fig. 22A ). Exopod with three articles, third article bearing seven plumose setae ( Fig. 22B ). Basis 2.3 times longer than wide; ventral margin with nine setulate setae; mid-distal outer margin with setulose seta; dorsal margin with row of seven translucent acute or subacute apophysis interspersed in row of eight setulate setae with distal-most being smaller, and sub-distal small simple seta; inner face with three (one sub-distal and two distal) small setae and distal spiniform seta on ventral margin ( Fig. 22D ). Ischium wider than long, with cluster of five simple setae of unequal lengths on ventral margin ( Figs 22D ). Merus 2.1 times longer than wide, widest distally; ventral margin with six setulate setae and sub-distal stout spiniform seta; outer margin with sub-distal dorsal simple setae; dorsal margin with a row of seven inner bipinnate spiniform setae and distal stout spiniform seta ( Fig. 22A– B ); inner face with cluster of six setulate setae on half proximal margin, four (three setulate and one inner bipinnate spiniform) setae on half distal margin, and two distal inner bipinnate spiniform setae ( Fig. 22D ). Carpus 1.2 times longer than wide; ventral margin with two stout spiniform setae and three simple setae; outer dorsal margin with four (two mid and two sub-distal) inner bipinnate spiniform setae and distal stout spiniform seta; dorsal margin with two inner bipinnate spiniform setae and distal stout spiniform seta; inner face with semi-circular row of eight inner bipinnate spiniform setae of unequal lengths extending from mid-face ventrally to dorsal margin; distodorsal margin with semi-circular row of seven inner bipinnate spiniform setae being smaller ventrally ( Fig. 22D ). Propodus 1.1 times longer than wide, widest distally; ventral margin with three stout spiniform setae and four simple setae; outer ventral margin with two (mid and distal) simple setae; dorsal margin with mid PSS, three (two mid and one subdistal) inner bipinnate spiniform setae, and two (sub-distal and distal) stout spiniform setae; inner face with simple seta and setulate spiniform seta on distal margin ( Fig. 22D ). Dactylus together with unguis shorter than propodus, dactylus longer than unguis; ventral margin of dactylus with mid denticle and small distal denticle having two small fine setae ( Fig. 22C ), dorsal margin with small simple seta.

Pereopod-2 ( Figs 23A , 24C ). Longer and less robust than pereopod-1, with mucus packets in carpus and propodus ( Fig. 24C ). Coxa with plumose seta and translucent acute or subacute apophysis on distoventral margin; inner face with distoventral row of five simple setae. Basis about 3.9 times longer than wide; ventral margin subproximal PSS and ten plumose setae; dorsal margin with two sub-proximal PSS, three curved translucent acute or subacute apophysis, seven plumose (four very small and three long of varying lengths) setae. Ischium wider than long, distoventral margin with three simple and two plumose setae of unequal lengths. Merus about twice longer than wide, widest distally; ventral margin with five small mid plumose setae, four (one in the middle, two subdistal, and distal) simple setae, and three sub-distal stout spiniform setae; dorsal margin with one sub-proximal and two sub-distal plumose setae. Carpus about 2.4 times longer than wide; ventral margin with five simple setae and four stout spiniform setae (two in the middle and two sub-distal); outer sub-distal margin with two stout spiniform setae, outer and inner sub-distal margin with a crown of six plumose setae (one extending distally over ¾ length of propodus) of varying lengths. Propodus about 4.9 times longer than wide, longer than combined lengths of merus and carpus; ventral margin with five mid-bipinnate stout spiniform setae, three simple setae; outer ventral margin with three plumose setae and outer dorsal margin with sub-distal plumose seta; dorsal margin with sub-distal PSS and two sub-distal simple setae; inner margin with sub-distal simple seta. Dactylus curved, styliform, acutely tip, together with unguis slightly longer than propodus, dactylus longer than unguis; dactylus with simple seta on mid ventral margin.

Pereopod-3 ( Figs 23B , 24D ). Similar to pereopod-2, but shorter. Basis with ventral margin having eight plumose setae and one PSS on distal margin; outer margin with two plumose setae; dorsal margin with three sub-proximal PSS, one curved translucent acute or subacute apophyses, and five plumose setae. Merus distodorsal margin with plumose seta.

Intraspecific variation. Julmarichardia (J.) gutui exhibits some degree of variation between left and right side of the same specimen, and among the individuals examined during this study as follows:

(1) Number of articles on the antennular outer flagellum observed on non-ovigerous females varied from 9–10.

(2) Number of articles on the antenna observed on non-ovigerous females varied from 11–12.

(3) Number of spiniform setae on the ventral margin of pereopod 2–3 propodus of non-ovigerous females varied from 3–4. This number can vary between right and left side of the same specimen.

(4) Number of bipinnate spiniform setae occurring in the inner view of merus of cheliped varied from 2–3.

Size-distribution. The non-ovigerous females ranged from 3.3 to 4.9 mm (n=10). Ovigerous females varied from 3.4 to 4.0 mm (n=3). Adult males ranged from 3.3 to 3.6 mm (n=4).

Remarks. Upon reexamination of paratypes and additional material used in the description of J. gutui , we found several discrepancies in its original description. These include: (1) the presence of a cluster/row of plumose setae (smaller mid-dorsally and increasing in size mid-laterally) on the mid-dorsolateral margin of the carapace of both sexes, but fewer present on males (illustrated but not included under the original description); (2) overall female cheliped with more plumose setae; (3) cheliped exopod with three articles; (4) female cheliped.merus having two translucent acute or subacute apophyses on sub-distal margin; (5) female cheliped.inner margin of merus bearing three bipinnate spiniform setae; and (6) female cheliped.carpus having five translucent acute or subacute apophysis on ventral margin.

Figures

FIGURE 20. Antenna: A, Richardjulmaia bajau; B, Julmarichardia sp. A; C, J. alinati; D, J. deltoides; E, J. thomassini: F, J. gutui; G, J. magdae sp. nov. Rostrum: H, J. sp.A; I, J. alinati; J, J. deltoides; K, J. thomassini: L, J. gutui; M, J. magdae sp. nov. Pereopod-1: N, J. gutui; O, J. magdae sp. nov. [Figures modified from: A, Bamber & Sheader (2005); B, G–H, M–O, Morales & Heard (this study); C, E, I, K, Guţu (1989a); D, J, Barnard (1914); F, L, Ritger & Heard (2007)]. Not to scale.

FIGURE 21. Julmarichardia gutui, topotypical non-ovigerous female (with oostegites). A, cheliped, outer view; B, cheliped, inner view; C, enlargement of seta. Scale bar = 0.1 mm for A–B.

FIGURE 22. Julmarichardia gutui, topotypical non-ovigerous female (with oostegites). A, pereopod-1, outer view; B, exopod of pereopod-1; C, enlargement of dactylus and unguis; D, pereopod-1, inner view. Scale bar = 0.1 mm.

FIGURE 23. Julmarichardia gutui, topotypical non-ovigerous female (with oostegites).A, pereopod-2, outer view; B,pereopod- 3, inner view. Scale bar = 0.1 mm.

FIGURE 24. Digital images of Julmarichardia gutui topotypical non-ovigerous female (with oostegites). A, cheliped, outer view, B, pereopod-1, outer view; C, peropod-2, outer view; D, pereopod-3, outer view. Red arrows shown the presence of mucus packets. Scale bars = 0.2 mm. Photos by A.G. Morales-Núñez.